Twist-Lock connectors in schools
- Thread starteregilson1
- Start date
I grew up and started my career in Oklahoma. We referred to them as "Edison". When I moved out here to Portland nobody knew what I was talking about; everyone called them PBG's. Made the move to Theatre construction and People mostly use 5-15. Same thing Ship was talking about earlier. Oklahoma/Midwest, Stage Pin, and sometimes you'd see a "Stage Plug" Move out here and it's GSP or Bates <more prevalent in the movies.> I like the variety. keeps everyone guessing.
I have a new development in my theories of why it’s called “edison”.
For a while I’ve been thinking it’s because household power has historically been supplied by local “Edison’s” (ComEd, Detroit Edison, Con Edison) and thus the connector to hook into their power is an edison connector.
Recently, on an antique christmas light collector page, I saw a screw base plug referred to as an “edison plug”. Before Hubbell invented the Tandem and Parallel blade connectors, the primary “plug” of the day utilized the same Edison 26 screw base as light bulbs. Capped screw base outlets, in the now traditional locations, were even installed in the more affluent and technologically progressive houses. As these screw base plugs were changed over to Hubbell designs, I suspect the nickname “edison plug” stuck around.
As an example, an early carbon filament Christmas lighting outfit with an Edison plug.
For a while I’ve been thinking it’s because household power has historically been supplied by local “Edison’s” (ComEd, Detroit Edison, Con Edison) and thus the connector to hook into their power is an edison connector.
Recently, on an antique christmas light collector page, I saw a screw base plug referred to as an “edison plug”. Before Hubbell invented the Tandem and Parallel blade connectors, the primary “plug” of the day utilized the same Edison 26 screw base as light bulbs. Capped screw base outlets, in the now traditional locations, were even installed in the more affluent and technologically progressive houses. As these screw base plugs were changed over to Hubbell designs, I suspect the nickname “edison plug” stuck around.
As an example, an early carbon filament Christmas lighting outfit with an Edison plug.
My notes on the Edison Screw. (No I don't remember or note where I got them from.) I'm open to the concept above but think a more lazy reason, but similar to ComEd/household perhaps. Note the seemingly Euro connection in the descriptions below, or for screw based lamp sockets in general for reason I don't think related to Edison plugs. Complete list of lamp sockets I know of posted on request. My notes are extensive.
E5 = Midget Screw/Lilliput Edison Screw (LES) 0.215" Dia. 0.37" Long Base. LCL - Filament to Bot. of base. IEC standard 7004-25
E10/12 = Mini Edison Screw (MES) (LCL is at Bot. of Base contact) Screw 0.37" (9.3mm) Dia. 0.59" Long Base. Porc. Skirt is 15mm Dia (???European Mini-Candelabra (M7) Base). IEC 7004-22
E11 = Mini-Candelabra Edison Screw 7/16" (10.7mm) Dia Extended/Skirted to 17/32" (15mm) Dia. at Top of Skirt.(Dia of ceramic insulator is .531" at LCL measurement). IEC 7004-6-1
E12/15 = Candelabra Edison Screw/Mini-Can ½" (0.47") Dia. 0.65" Long Base (LCL is at Bot of Base contact.) IEC 7004-28.
E14 = European Screw / Small Edison Screw (SES) 0.540" Dia. 0.85" Long Base. Sym. to E-12, but larger & Longer. 230v IEC 7004-23.
E17/20 = Intermediate Edison Screw 5/8" (0.642") (17mm) Dia. 0.82" Long Base (LCL is at Bot of Base contact.) 120v Appliance, IEC 7004-26
E26s = Medium Screw Single Contact / Medium One-Inch Edison Screw(ES or MES) 1.1/16" (26mm) Dia. (LCL is at Bot of Base contact.) ANSI #C61.61-1990sheet 1-157-1; IEC 7004-21A-2.
E27 = Admedium, “Edison Screw” Similar to Medium E-26 Lamp Base, 230v 1.5/32" (1.03") Dia. 1.05" Long Base (LCL is at Bot of Base contact.) Usually For Euro 240v Systems DIN #49620, IEC #7004-21
E29 = Admedium Edison Screw (ES), 29mm (No info.)
E39 = Mogul Screw/ Single Contact (Mogul-In America) Goliath Edison Screw (GES). 120v 250w+ Industrial 1.19/32" (39mm) Dia (LCL is at Bottom of Base contact.) IEC 7004-24
E40 = Mogul Screw/ Mogul Goliath Edison Screw (GES) 230v 250w+ 1.55" Dia, 1.88" Long Base (LCL is at Bottom of Base Contact.) DIN #49625, IEC #7004-24, ANSI #C81.61-1990sheet 1-185-1
Also a side note from my notes...
Typical Lamp Efficacies:
Edison’s First Lamp: 1.4 Lumen/Watt.
Typical Incandescent Lamps: 10-40 Lumen/Watt.
E5 = Midget Screw/Lilliput Edison Screw (LES) 0.215" Dia. 0.37" Long Base. LCL - Filament to Bot. of base. IEC standard 7004-25
E10/12 = Mini Edison Screw (MES) (LCL is at Bot. of Base contact) Screw 0.37" (9.3mm) Dia. 0.59" Long Base. Porc. Skirt is 15mm Dia (???European Mini-Candelabra (M7) Base). IEC 7004-22
E11 = Mini-Candelabra Edison Screw 7/16" (10.7mm) Dia Extended/Skirted to 17/32" (15mm) Dia. at Top of Skirt.(Dia of ceramic insulator is .531" at LCL measurement). IEC 7004-6-1
E12/15 = Candelabra Edison Screw/Mini-Can ½" (0.47") Dia. 0.65" Long Base (LCL is at Bot of Base contact.) IEC 7004-28.
E14 = European Screw / Small Edison Screw (SES) 0.540" Dia. 0.85" Long Base. Sym. to E-12, but larger & Longer. 230v IEC 7004-23.
E17/20 = Intermediate Edison Screw 5/8" (0.642") (17mm) Dia. 0.82" Long Base (LCL is at Bot of Base contact.) 120v Appliance, IEC 7004-26
E26s = Medium Screw Single Contact / Medium One-Inch Edison Screw(ES or MES) 1.1/16" (26mm) Dia. (LCL is at Bot of Base contact.) ANSI #C61.61-1990sheet 1-157-1; IEC 7004-21A-2.
E27 = Admedium, “Edison Screw” Similar to Medium E-26 Lamp Base, 230v 1.5/32" (1.03") Dia. 1.05" Long Base (LCL is at Bot of Base contact.) Usually For Euro 240v Systems DIN #49620, IEC #7004-21
E29 = Admedium Edison Screw (ES), 29mm (No info.)
E39 = Mogul Screw/ Single Contact (Mogul-In America) Goliath Edison Screw (GES). 120v 250w+ Industrial 1.19/32" (39mm) Dia (LCL is at Bottom of Base contact.) IEC 7004-24
E40 = Mogul Screw/ Mogul Goliath Edison Screw (GES) 230v 250w+ 1.55" Dia, 1.88" Long Base (LCL is at Bottom of Base Contact.) DIN #49625, IEC #7004-24, ANSI #C81.61-1990sheet 1-185-1
Also a side note from my notes...
Typical Lamp Efficacies:
Edison’s First Lamp: 1.4 Lumen/Watt.
Typical Incandescent Lamps: 10-40 Lumen/Watt.
) Now, to you have the equivalent for all the prefucus and Like this:
Metric / Standard Base Conversions:
“A” = The Letter following the base type designates that the distance from the bottom of the collar to the bottom of the base contact on SC or DC Prefocus Lamps is 13/32"
“B” = As a letter following the base type designates the distance from the bottom of the collar of the base contact is 9/16". For LCL determination.
B22d = 2-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
B22-3 = 3-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
BA5s = European Bayonet Base, 0.197" Dia, 0.35" long bulb to tip of single contact. Note: use of vertical fins instead of lugs.
BA7s = European Bayonet Base, 0.276" Dia, 0.45" long Bulb to tip of single contact. Note: use of vertical fins instead of lugs.
BA9s = Miniature Bayonet Base, 0.355" (9mm) Dia, 0.53" long bulb to tip of single contact.
B15d = (?Dual Contact Bayonet Candelabra w. Pins out of alignment w. eachother) Din #49721, IEC #7004-11
BA15s = SC Bay, Single-Contact Bayonet Candelabra 5/8" (0.59") Dia. (LCL at top of Alignment Pins) Base Length 0.775". DIN #49720, IEC #7004-11A,
ANSI #C81.61-1990sheet 1-20-1
BA15d = DC Bay, Double-Contact Bayonet Candelabra 5/8" (15.25mm) Dia. (0.59") Base Length 0.775" (LCL at top of Alignment Pins) DIN #49720, IEC #7004-11A,
ANSI #C81.61-1990sheet 1-20-1, Leviton Base #910-01, 910-200, 910-201 & 910-209
BAY15s = Single Contact Bayonet Indexing, Special top of base, but otherwise sym. to normal BA15s.
BAY15d = DC Bay, Double-Contact Bayonet Indexing, Special top of base, but otherwise sym. to normal BA15d. B22-3 = 3-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
BA22d/22 = DC European Double Contact Bayonet, 0.866 Dia., 1" long Base. IEC #7004-10 2-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
BY-22D = DC Bay, Double Contact Bayonet Indexing, (Low Pressure Sodium Vapor Lamps) Leviton #8806, One-Piece Keyless, HID, Glazed Porcelain Lampholder, Single Circuit Back Wired, 660w/1,000v, 9" 16ga SEWF-2 150c Leads, Surface Mount, Nickel-Plated Copper Alloy Screw Shell, Glazed Porcelain Shell.
BB = Brass Base, Usually on E-26 type lamp base. Brass Bases are recommended for exterior use.
CA = Cable on Anode Base
Candelabra Pre-Focus = Pre-Focus Lamp Base with OD of Ring 1.3/16", and Base 5/8" Dia.
Contact Lug = 2-Lug, Mainly used on automotive headlamps where two terminals are required (High Beam), 3-Lug (Hi/Lo Beam)
DC Bayonet = seeBA 15d above
DC Index = same as BA 15d above, but with filament out of center radius of “S” type lamp. NOTE: LCL and MOL is the same on most lamps, Lamp base is correspondingly Longer due to higher filament placement if LCL is the same as DC Bayonet.
DC Pref = Double Contact Pre-Focus Base, sym. to SC Prefocus Base w. two contacts.
Disc = 7/8" Dia.
DF Wedge = Special Shaped lamp base w. double contact 0.78" dia. 0.82" long.
Double Contact Medium = Skirted DC Lamp Base, 7/8" Dia at Bot./ 1.1/32" at top of Skirt
E5 = Midget Screw/Lilliput Edison Screw (LES) 0.215" Dia. 0.37" Long Base. LCL - Filament to Bot. of base. IEC standard 7004-25
E10/12 = Mini Edison Screw (MES) (LCL is at Bot. of Base contact) Screw 0.37" (9.3mm) Dia. 0.59" Long Base. Porc. Skirt is 15mm Dia (???European Mini-Candelabra (M7) Base). IEC 7004-22
E11 = Mini-Candelabra Edison Screw 7/16" (10.7mm) Dia Extended/Skirted to 17/32" (15mm) Dia. at Top of Skirt.(Dia of ceramic insulator is .531" at LCL measurement). IEC 7004-6-1
E12/15 = Candelabra Edison Screw/Mini-Can ½" (0.47") Dia. 0.65" Long Base (LCL is at Bot of Base contact.) IEC 7004-28.
E14 = European Screw / Small Edison Screw (SES) 0.540" Dia. 0.85" Long Base. Sym. to E-12, but larger & Longer. 230v IEC 7004-23.
E17/20 = Intermediate Edison Screw 5/8" (0.642") (17mm) Dia. 0.82" Long Base (LCL is at Bot of Base contact.) 120v Appliance, IEC 7004-26
E26s = Medium Screw Single Contact / Medium One-Inch Edison Screw(ES or MES) 1.1/16" (26mm) Dia. (LCL is at Bot of Base contact.) ANSI #C61.61-1990sheet 1-157-1; IEC 7004-21A-2
E26/50x39 = Medium Skirted Screw 1.1/16" Dia. Scr. / 1.1/2" Dia at Top of Skirt. (LCL is at Bot of Base contact.)
E26d = “3 Kon-Tact” Medium Screw Dual Contact (3-Way Lamp Base) 1.1/16" Dia. (LCL is at Bot of Base contact.)
E27 = Admedium, “Edison Screw” Similar to Medium E-26 Lamp Base, 230v 1.5/32" (1.03") Dia. 1.05" Long Base (LCL is at Bot of Base contact.) Usually For Euro 240v Systems DIN #49620, IEC #7004-21
E29 = Admedium Edison Screw (ES), 29mm (No info.)
E39 = Mogul Screw/ Single Contact (Mogul-In America) Goliath Edison Screw (GES). 120v 250w+ Industrial 1.19/32" (39mm) Dia (LCL is at Bottom of Base contact.) IEC 7004-24-A1
E40 = Mogul Screw/ Mogul Goliath Edison Screw (GES) 230v 250w+ 1.55" Dia, 1.88" Long Base (LCL is at Bottom of Base Contact.) DIN #49625, IEC #7004-24, ANSI #C81.61-1990sheet 1-185-1
EEM = (EX39) Extended Eyelet Mogul Base.
EMEP = Extended Mogul End Prong
F = Cable Terminal Type with flag faston terminal.
Fa4 = RSC Type Lamp with External Contact Pin (Instead of Recessed)
Fa8 = Single Pin
Fastoon Cap = S8.5/8 Base (Ridged Loop) (RLX-Shape) RSC type lamp base with metal ring around porcelain body.
Ferrule = Contact discs/Points Mounted on Reflector Lamp Base with or without Bracket for Screw, Combination or Terminals Attached.
G3.9 = Extra Small Bi-Pin MR-11 Lamp Base, 3.9mm oc. w. pins 9mm long, and 1.5mm dia. ANSI #C81.61-1990sheet 1-300-1
G 4 = Wedge & 2-Pin 4mm oc. Bet. Pins Pin Dia. is 0.028" (0.7mm) Note: Has Exhaust Tip sticking out bet. pins Base is 0.33" wide. (LCL at Bot of Ceramic Base - Where Pins Come Out) IEC # 7004-72, Leviton Base #1562-100, 1563-100 & 80054-200 & 80054
GU4 = BI Pin MR 11 Lamp Base w. Pins 4mm oc. and Pins 0.7 & 1mm Dia. 6mm Long
GY4 = Bi-Pin MR Lamp base w. Pins 4mm oc. and pins 1mm Dia, 6mm Long
GZ4 = (MR-11) SE. Min. Quartz Round Lamp Base w. Skirted Sloped Sides, Pin dia. is 0.7mm (to 1mm), pin o.c. is 4mm. Pin length is 6mm IEC #7004-67, Leviton Base #80054-200 & 80054
GZX4 = Bi-Pin MR lamp with wide rim porc. base. Pins 4mm o.c.
G5 = Miniature Bi-Pin
G5.3 = Miniature 2-Pin 5.3mm oc. Bet. Pins Pin Dia is 1.56mm (LCL at Bot of Ceramic Base - Where Pins Come Out), IEC #7004-73-2, ANSI #C81.61-1990sheet 1-20-1
G5.3x4.8 = Pins 5.3mm oc. 7mm long & 0.5x4.8mm oval Pins
GU5.3 = 2-Pin Round Pins 1.45 & 1.6mm, 5.3mm oc. w. 6.1mm Long. Locking Ring Interchangeable with GX 5.3 Lamp Base.
GX5.3 = 2-Pin Round Pins Same Dia. Reflector 5.3mm oc. 1.5mm Dia. Pins, 5.2mm Long. (Low Voltage) (MR-16) (2-Pin & RM2P) (Round Pins, Sloped Sides to Base) (LCL at Bot of Ceramic Base - Where Pins Come Out) IEC #7004-73, ANSI #C61.61-1990sheet 1-321-1, Leviton Base #80054-200, 80054, 80052, 80050, & 80051
GY5.3 = Oval/Flat 2-Pin pin Reflector dia is 1.25mm. Pin Min Thickness is 0.7x2mm at 5.3mm oc. (LCL at Bot of Ceramic Base - Where Pins Come Out)
G 6.35 = Glass 2-Pin, Pin Dia is 1mm, at 6.35mm oc. 7.5mm Long (?Same as GX6.35 &GY6.35) IEC #7004-73, ANSI #C61.61-1990sheet 1-340-1, Leviton Base #80054-200 & 80054
G 6.35/15x19 = 2-Pin, Pin Dia is 1.6mm, at 6.35mm oc.
GX 6.35 = Glass 2-Pin Base Pin Dia is 1mm and 7.5mm Long. (?Same as GX6.35 &GY6.35) IEC #7004-73, ANSI #C61.61-1990sheet 1-340-1
GY 6.35 = Glass 2-Pin Base with 6.35mm oc. bet. pins and 0.44" wide base. Pin Dia. is 1.25mm at 7.5mm Long.
(?Same as GX6.35 &GY6.35) IEC #7004-73, ANSI #C61.61-1990sheet 1-340-1, (Leviton Base #80054-200, 80054 & 80053)
GZ 6.35 = Round 2-Pin Base, Sloped Sides to Base, Pin Dia is 1mm, at 6.35mm oc. Pin Length is 6mm. DIN #49754, IEC #7004-59A
G 7.9 = Standard 120v Base at 90° off Axis, 7.92mm oc. pin dia. is 2.4 & 3.2mm
GU 7 = Twist & Lock Base, MR-16 12v (Sym. to Fluorescent Starter Canister)
GX 7.9 = 2-Pin (TB-2P & 2Pin Ven) Low Voltage Lamp Base at 90° off Axis, 7.92mm oc. pin dia. is 2.4 & 3.2mm
G8 = 2-Pin with pins 8mm. on Center
G9 = Bi-Pin Base w. Pins 9mm oc. 4.4mm Long and 0.5mm in Dia.
G9.5 = Medium 2-Pin (w. Heat Sink for HPL)3/8" o.c. bet. Pins / 9.53mm oc. Bet. Pins 15/16" at top of Skirt and 24mm wide at horz. width Pin Dia is 3.17mm at 11.4mm long. (LCL at Bot of Ceramic/Alum Base - Where Pins Come Out)
GX9.5 = Skirted Medium Prefocus 2-Pin Pin dia is 3.2mm x 8.4mm Long, 9.5mm oc. (LCL at Bot of Ceramic Base - Where Pins Come Out) Note: Porc. Alignment/Spacer Pegs coming out of Base at Bot. This 9.5 Base is Larger Rectangle than GY base, with Center Alignment Slot Pn Dia is 3.17mm DIN #49638, IEC #7004-70A
GY9.5 = Skirted 2-Pin Medium Prefocus Pin Dia is 3.2mm & 2.4mm, at 9.53mm oc. Pin Length is 8.6mm, Skirt Width is 30mm. (Higher Wattage) (Base Makes Cross Shape) (LCL at Bot of Ceramic Base - Where Pins Come Out) (Smaller Shape than GX 9.5) IEC #7004-70B, AnSI #C81.61-1990sheet 1-369-1.
GZ 9.5 = Pins are two different Dia. 3.2 & 2.3mm Dia. 8.6mm Long Porc. is 24mm Wide. 2-Pin Prefocus (LCL at Bot of Ceramic Base - Where Pins Come Out)
GZX 9.5 = Lamp Base w. 9.5mm oc. pins 3.2mm Dia, 8.6mm Long and on Center a Large Valley in Porc. Socket bet. Pins. approx 8mm Deep
GZY 9.5 = Lamp Base w. 9.5mm oc. Pins 3.2 & 2.3mm Dia, 8.6mm Long and on Center a Large Valley in Porc. Socket Bet. Pins appx 8mm Deep
GZZ 9.5 = Lamp Base w. 9.5mm oc. Pins 2.3mm Dia, 8.6mm Long and on Center a Large Valley in Porc. Socket Bet. Pins appx 8mm Deep
GZ 10 = 2-Pin Base, w. wide T-shaped pins. (Same type of pins as on Fluorescent Starter), GU 10 bases can be used with GZ 10 bases.
GZ 10 = 2-Pin Base, w. wide T-shaped pins. 7mm Long (Same type of pins as on Fluorescent Starter), GZ 10 bases cannot be used with GU 10 bases.
G12 = SE. MH, 150w, Bi-Pin Base 12mm oc. 2.4mm Dia pins, 11.4mm Long. Leviton Base #557, Pulse Rated
G12.7 = Med. Side Prong (MSP)
G13 = Medium Bipin
GY16 = 2-Pin Prefocus Pin Length is 16mm, Pin Dia. is 4.8&3.2mm, at 16mm oc. (LCL at Bot of Ceramic Base - Where Pins Come Out)
GX16d = 2.1/16" wide, Mogul End Prong 31/64" high, Pin oc. is 16.6mm, and 13.6mm Long or (EMEP) Extended Mogul End Prong, Double Contact 1.1/4" high
G17t = 3-Pin Prefocus
G17q = 4-Pin Prefocus (Sym in shape to GX17q) Pins 1&4 are Hot DIN #49665, IEC #7004-45, ANSI C81.61-1990sheet 1-440-1
GX17q = 4-Pin Prefocus (Low Voltage) Pins 1&4 are Hot.
G20 = Mogul Bipin
G22 = Medium Bipost 7/8" o.c. Bet. Pins / 22mm o.c. Bet. Pins, 5/8" Length Pin Dia is 6.35mm (LCL at Bot of Ceramic Base - Where Pins Come Out),
IEC #7004-75, ANSI #C81.61-1990sheet 1-466-1
GY22 = Bi-Pin Lamp Base, with 26mm pins, 9.1mm & 6.4mm Dia. Pins 22mm oc. Ignition voltage must be applied to the thin pin.
G22+Cable = G=22 base with ring terminal & cable from top of lamp. Pins are short circuited together, the electrode furthest from base must be connected via cable.
G23 = Compact Fluorescent Lamp Base 9wPL-s/BAX type w. Single alignment ridge. & 2 Contact Pins on line
GX23 = Compact Fluorescent Lamp Base, w. Double alignment ridge., & 2 Contact Pins on line
GX23-2 = Compact Fluorescent Lamp Base, same as GX 23, but with larger lamp base tube support.
G38 = Mogul Bipost Pins 1.1/2" o.c / 38.1mm o.c. and Pin Length 1.1/8" Pin Dia is 11.1mm (LCL at Bot of Ceramic Base - Where Pins Come Out) IEC #7004-76, ANSI #C81.61-1990sheet 1.519-1
G53 = Multi-Purpose, quick disconnect and 6-32 Screw Thread terminal on PAR 36 or AR-111 lamp.
K = Unique Base
KPR = Krypton Gas, Pre-focus base.
Knurled Screw = sym to SFc/ SFa Lamp Base. with Screw & Nut End. Nut is 0.38" Dia. & 0.29" Long
LHT = Left-hand threaded medium lamp base.
MB = Miniature Bayonet
Med.NP = Med. Screw, Nickle Plated Brass Base
MEP = Mogul End Prong
M-23 Bi-Pin = TL-1.1/2 Bulb with pins9/64"oc. (3.57mm)
Miniature 2-Pin = Sym. to G-5 Lamp base, but pins are 3/16" o.c. (4.76mm)
Miniature Flanged = Sym. to BA9s, w/o bayonet lugs, has 0.533" Dia. Prefocus Flange bet top of base and lamp. Base Length is 0.61".
MP = Multi-Purpose Terminal - Mainly used on non-headlamp PAR applications. This base is designed to accept both slip-on and screw lugs.
MSP = (G-12.7) Medium Side Prong, 1.7/16" Dia Brass Base with Plug Prongs off to side
NPBB = Nickel-Plated Brass Base
P = European Designation
P14.5s = Single Contact Bayonet Prefocus w. Alignment Shield, Length bet. Base & top of Alignment Shield is 18.5mm
P28s = Medium Prefocus Single Contact 1.1/16" (27.4mm) Dia. 25mm Long, and 33.5mm Wide at Skirt. (LCL at Top of Base Fins) DIN #49728, IEC #7004-42, ANSI #C81.61-1990sheet 1-700-1
P30s = SC Pf, Candelabra Prefocus Single Dontact (LCL at Top of Base Fins)
P30d = DC Pf, Candelabra Prefocus Double Contact (LCL at Top of Base Fins)
P40s = Mogul Prefocus Single Contact 1.1/2" (39.5mm) Dia, 2" Dia at outside of Fins. (LCL at Top of Base Fins)
PC = Printed Circuit Application.
PG12 = HPS Lamp, Leviton #558, Pulse Rated (Sym. to G12)
PG22-6.35 = Shielded Pre-Focus Base with Dual Bi-Pin G6.35 Pins, (6.35mm o.c.) DIN #49751, IEC #7004-48
PO E-39 = Position Orientated E-39 Mogul Base.
POMB = Position Orientated Mogul Base.
R7s / RSC/R75 = Recessed Single Contact, Recessed Concave Contact (Behind Porc. Insulation) 9/32" Dia. Porcelain Ferrule. Pinch Measures 8mm x 18mm.
DIN #49750, IEC #7004-92, ANSI #C8.61-1990sheet 1-770-1 (See LL Below for LCL)
R17d = Recessed Dual Contact
RT = Cable Terminal Type with Round Terminal
RX7s/RSC = (R75) Recessed Single Contact, Pinch Measures 9.14mm x 22.4mm Leviton #554 Front Flange & 555 Rear Flange, 555-121/021 & 554-121/021 are For MH Lamps, 554/554-100 & 555/555-100 are for Quartz Lamps
R7s-12 = RSC Lamp Base w. Porc. Recess Support Dia of 7mm & 12mm dia at widest point (Pinch) where Lamp Base meets lamp Glass
R7s-18 = RSC Lamp Base w. Porc. Recess Support Dia of 7mm & 18mm dia at widest point (Pinch) where Lamp Base meets Lamp Glass
Rigid Loop = RSC type Lamp Base with wire lead loop contact in crimped bulb end at ends as opposed to concave contact in porcelain
“S” = The few SC and DC Prefocus Base Lamp s with a “s” designation are special in that the collar location and or the orientation of the contacts differs from the standard “A” or “B” contact to collar distance.
SC Pf = Single Contact, BA type based lamp with large Pre-Focus fin instead of Lugs. 1.18" Dia to outside of Wing, 0.8" Long Base.
Screw Terminal = 7/8" o.c. Ferrules
SF Wedge = Sym. to DF Wedge, but w. single contact.
SFa = Base w. Cable or Base With Hollow For Cable or Rod to be mounted in with a set Screw to Retain it. (1st Number is Skirt, Second Number is Set Screw Mount.)
(SFa15-10, SFa16-8, SFa16-10, SFa20-8, SFa20-10, SFa25-10, SFa27-8, SFa27-10, SFa27-11, SFa27-12, SFa27-14, SFa28-18)
SFa21-12 = Mult. Dia. Xenon Base w. 21mm Skirt & 12mm Pin.
SFaX = SFa Lamp Base w. Countersunk Flat and Side Post (SFaX27-10, SFaX27-9.5, SFaX27-12, SFaX27-13, SFaX27-14, SFaX30-9.5, SFaX30-16)
SFc = Screw End on Anode Side of Lamp (SFc 10-4, SFc 6-3, SFc 12-4, SFc 13-4) All Have 1.6mm Wide Alignment Slit and The First Number in its Code Representing the Skirted Dia. the Second Number Representing The Post or Threaded Screw Dia. in Metric SFc25-14 & SFc27-14 have Threaded Stud End w. Nut of Same Skirt Dia.
SFcX 12-4 = Threaded End Post 12mm Skirt w. M4 Thread.
SFcX 27-8 = Threaded M-8 Xenon Lamp Base w. 2 Side Posts. 27mm at Skirt.
SK = Skirted Base Found on Mini-Can & PAR Lamps
SK 27-50 = Xenon Lamp Base w. Side Post off to One Side, both for Contact But Usually Base/End of lamp For Support and Cable Crimped Side Post for Power.
Slide #1 = Pointed Base, w. contact wings off to side of lamp body, 1.27" long base tip to end of contact.
Slide #2 = Pointed Base, w. contact wings off to side of lamp body also extending on sides of tip material, 1.2" long base tip to end of contact.
Slide #3 = Pointed Base, w. contact wings off to side of lamp body also extending on sides of tip material, sym. to Slide #2 in all ways.
Slide #5 = Flat Base, w. contact wings on sides of tubular bulb body. 0.65" long base end to tip ends of contacts.
Slide #6 = Flat Base, w. contact wings on sides of tubular bulb body. 0.6" long base end to tip ends of contacts. sym to Slide #5 but narrower
Special Screw = 0.187" Dia. 0.3" Long. Short fine screw thread and larger porcelain body to base.
T = Cable Terminal type lamp base, with straight faston terminal.
T-3/4 = Micro-Midget Flanged Base, Body 0.123" Dia., Length from bulb to tip of single contact 0.13".
T-3/4 = Bi-Pin with pins 0.05" spaced, and lamp base 0.096" wide.
T-1 = Sub-Midget Flanged Base, Body 0.158" Dia., Length from bulb to tip of single contact 0.16".
T-1 = Bi-Pin with pins 0.5" spaced, and lamp base 0.124" wide.
T-1 = Bi-Pin 100, with pins 0.1" spaced, and lamp base 0.124" wide.
T-1.1/4 = Special-Midget Flanged, Body 0.185" Dia., Length from bulb to tip of single contact 0.33".
T-1.1/4 = Bi-Pin with pins 0.1" spaced, and lamp base 0.124" wide.
T-1.3/4 = Midget Grooved\, Body 0.235" Dia., Length from bulb to tip of single contact 0.335".
T-1.3/4 = Bi-Pin with pins 0.124" spaced, and lamp base 0.23" wide.
T-1.3/4 = Glass Wedge, 0.2" wide. glass tip at bottom & contact rails on sides of glass bulb.
T-3.1/4 = Glass Wedge, 0.37" wide. small glass tip at bottom & contact rails on sides of glass bulb.
T-5 = Glass Wedge, 0.37" wide. glass tip at bottom & contact rails on sides of glass bulb. Note: contact rails are the same shape.
TP = Base w. Threaded Pin
TM = Threaded Pin w. Modified Thread
Wedge - Sym. to G-4 Lamp Base, but without pins. Contacts are flush in the glass. Leviton Base #562,562-800 562-001, 562-002, 562-003 & 562-005
Wire lead Lamp Bases. = Heat, humidity and mechanical loads place high demands on airfield lamps, yet these lamps have to be easy to adjust and replace. Osram lamps with cable connections and cement free prefocusing bases have been designed to meet all these requirements. By moving the electrical contacts away from the lamp base, we have been able to reduce significantly the risk of the base or seal overheating as a result of electrical contact resistances. The prefocusing base greatly reduces the need for adjustments by the housing manufacturer and by the end user. Overall, these features lead to improved electrical contact and excellent reliability.
Or did you want something different from elsewhere in notes? I literally almost every day of the week, and took my vacacations from 2000-2010 in spending my time reading books and lamp catalogues, than copying everything useful into lamp tables or notes. Page by page. I learned how to type really fast.
My updating of notes since married and child have fallen off since than but still get upgraded once in a while.
Metric / Standard Base Conversions:
“A” = The Letter following the base type designates that the distance from the bottom of the collar to the bottom of the base contact on SC or DC Prefocus Lamps is 13/32"
“B” = As a letter following the base type designates the distance from the bottom of the collar of the base contact is 9/16". For LCL determination.
B22d = 2-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
B22-3 = 3-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
BA5s = European Bayonet Base, 0.197" Dia, 0.35" long bulb to tip of single contact. Note: use of vertical fins instead of lugs.
BA7s = European Bayonet Base, 0.276" Dia, 0.45" long Bulb to tip of single contact. Note: use of vertical fins instead of lugs.
BA9s = Miniature Bayonet Base, 0.355" (9mm) Dia, 0.53" long bulb to tip of single contact.
B15d = (?Dual Contact Bayonet Candelabra w. Pins out of alignment w. eachother) Din #49721, IEC #7004-11
BA15s = SC Bay, Single-Contact Bayonet Candelabra 5/8" (0.59") Dia. (LCL at top of Alignment Pins) Base Length 0.775". DIN #49720, IEC #7004-11A,
ANSI #C81.61-1990sheet 1-20-1
BA15d = DC Bay, Double-Contact Bayonet Candelabra 5/8" (15.25mm) Dia. (0.59") Base Length 0.775" (LCL at top of Alignment Pins) DIN #49720, IEC #7004-11A,
ANSI #C81.61-1990sheet 1-20-1, Leviton Base #910-01, 910-200, 910-201 & 910-209
BAY15s = Single Contact Bayonet Indexing, Special top of base, but otherwise sym. to normal BA15s.
BAY15d = DC Bay, Double-Contact Bayonet Indexing, Special top of base, but otherwise sym. to normal BA15d. B22-3 = 3-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
BA22d/22 = DC European Double Contact Bayonet, 0.866 Dia., 1" long Base. IEC #7004-10 2-Lug Sleeve, 15/16" Dia. (LCL at top of Alignment Pins)
BY-22D = DC Bay, Double Contact Bayonet Indexing, (Low Pressure Sodium Vapor Lamps) Leviton #8806, One-Piece Keyless, HID, Glazed Porcelain Lampholder, Single Circuit Back Wired, 660w/1,000v, 9" 16ga SEWF-2 150c Leads, Surface Mount, Nickel-Plated Copper Alloy Screw Shell, Glazed Porcelain Shell.
BB = Brass Base, Usually on E-26 type lamp base. Brass Bases are recommended for exterior use.
CA = Cable on Anode Base
Candelabra Pre-Focus = Pre-Focus Lamp Base with OD of Ring 1.3/16", and Base 5/8" Dia.
Contact Lug = 2-Lug, Mainly used on automotive headlamps where two terminals are required (High Beam), 3-Lug (Hi/Lo Beam)
DC Bayonet = seeBA 15d above
DC Index = same as BA 15d above, but with filament out of center radius of “S” type lamp. NOTE: LCL and MOL is the same on most lamps, Lamp base is correspondingly Longer due to higher filament placement if LCL is the same as DC Bayonet.
DC Pref = Double Contact Pre-Focus Base, sym. to SC Prefocus Base w. two contacts.
Disc = 7/8" Dia.
DF Wedge = Special Shaped lamp base w. double contact 0.78" dia. 0.82" long.
Double Contact Medium = Skirted DC Lamp Base, 7/8" Dia at Bot./ 1.1/32" at top of Skirt
E5 = Midget Screw/Lilliput Edison Screw (LES) 0.215" Dia. 0.37" Long Base. LCL - Filament to Bot. of base. IEC standard 7004-25
E10/12 = Mini Edison Screw (MES) (LCL is at Bot. of Base contact) Screw 0.37" (9.3mm) Dia. 0.59" Long Base. Porc. Skirt is 15mm Dia (???European Mini-Candelabra (M7) Base). IEC 7004-22
E11 = Mini-Candelabra Edison Screw 7/16" (10.7mm) Dia Extended/Skirted to 17/32" (15mm) Dia. at Top of Skirt.(Dia of ceramic insulator is .531" at LCL measurement). IEC 7004-6-1
E12/15 = Candelabra Edison Screw/Mini-Can ½" (0.47") Dia. 0.65" Long Base (LCL is at Bot of Base contact.) IEC 7004-28.
E14 = European Screw / Small Edison Screw (SES) 0.540" Dia. 0.85" Long Base. Sym. to E-12, but larger & Longer. 230v IEC 7004-23.
E17/20 = Intermediate Edison Screw 5/8" (0.642") (17mm) Dia. 0.82" Long Base (LCL is at Bot of Base contact.) 120v Appliance, IEC 7004-26
E26s = Medium Screw Single Contact / Medium One-Inch Edison Screw(ES or MES) 1.1/16" (26mm) Dia. (LCL is at Bot of Base contact.) ANSI #C61.61-1990sheet 1-157-1; IEC 7004-21A-2
E26/50x39 = Medium Skirted Screw 1.1/16" Dia. Scr. / 1.1/2" Dia at Top of Skirt. (LCL is at Bot of Base contact.)
E26d = “3 Kon-Tact” Medium Screw Dual Contact (3-Way Lamp Base) 1.1/16" Dia. (LCL is at Bot of Base contact.)
E27 = Admedium, “Edison Screw” Similar to Medium E-26 Lamp Base, 230v 1.5/32" (1.03") Dia. 1.05" Long Base (LCL is at Bot of Base contact.) Usually For Euro 240v Systems DIN #49620, IEC #7004-21
E29 = Admedium Edison Screw (ES), 29mm (No info.)
E39 = Mogul Screw/ Single Contact (Mogul-In America) Goliath Edison Screw (GES). 120v 250w+ Industrial 1.19/32" (39mm) Dia (LCL is at Bottom of Base contact.) IEC 7004-24-A1
E40 = Mogul Screw/ Mogul Goliath Edison Screw (GES) 230v 250w+ 1.55" Dia, 1.88" Long Base (LCL is at Bottom of Base Contact.) DIN #49625, IEC #7004-24, ANSI #C81.61-1990sheet 1-185-1
EEM = (EX39) Extended Eyelet Mogul Base.
EMEP = Extended Mogul End Prong
F = Cable Terminal Type with flag faston terminal.
Fa4 = RSC Type Lamp with External Contact Pin (Instead of Recessed)
Fa8 = Single Pin
Fastoon Cap = S8.5/8 Base (Ridged Loop) (RLX-Shape) RSC type lamp base with metal ring around porcelain body.
Ferrule = Contact discs/Points Mounted on Reflector Lamp Base with or without Bracket for Screw, Combination or Terminals Attached.
G3.9 = Extra Small Bi-Pin MR-11 Lamp Base, 3.9mm oc. w. pins 9mm long, and 1.5mm dia. ANSI #C81.61-1990sheet 1-300-1
G 4 = Wedge & 2-Pin 4mm oc. Bet. Pins Pin Dia. is 0.028" (0.7mm) Note: Has Exhaust Tip sticking out bet. pins Base is 0.33" wide. (LCL at Bot of Ceramic Base - Where Pins Come Out) IEC # 7004-72, Leviton Base #1562-100, 1563-100 & 80054-200 & 80054
GU4 = BI Pin MR 11 Lamp Base w. Pins 4mm oc. and Pins 0.7 & 1mm Dia. 6mm Long
GY4 = Bi-Pin MR Lamp base w. Pins 4mm oc. and pins 1mm Dia, 6mm Long
GZ4 = (MR-11) SE. Min. Quartz Round Lamp Base w. Skirted Sloped Sides, Pin dia. is 0.7mm (to 1mm), pin o.c. is 4mm. Pin length is 6mm IEC #7004-67, Leviton Base #80054-200 & 80054
GZX4 = Bi-Pin MR lamp with wide rim porc. base. Pins 4mm o.c.
G5 = Miniature Bi-Pin
G5.3 = Miniature 2-Pin 5.3mm oc. Bet. Pins Pin Dia is 1.56mm (LCL at Bot of Ceramic Base - Where Pins Come Out), IEC #7004-73-2, ANSI #C81.61-1990sheet 1-20-1
G5.3x4.8 = Pins 5.3mm oc. 7mm long & 0.5x4.8mm oval Pins
GU5.3 = 2-Pin Round Pins 1.45 & 1.6mm, 5.3mm oc. w. 6.1mm Long. Locking Ring Interchangeable with GX 5.3 Lamp Base.
GX5.3 = 2-Pin Round Pins Same Dia. Reflector 5.3mm oc. 1.5mm Dia. Pins, 5.2mm Long. (Low Voltage) (MR-16) (2-Pin & RM2P) (Round Pins, Sloped Sides to Base) (LCL at Bot of Ceramic Base - Where Pins Come Out) IEC #7004-73, ANSI #C61.61-1990sheet 1-321-1, Leviton Base #80054-200, 80054, 80052, 80050, & 80051
GY5.3 = Oval/Flat 2-Pin pin Reflector dia is 1.25mm. Pin Min Thickness is 0.7x2mm at 5.3mm oc. (LCL at Bot of Ceramic Base - Where Pins Come Out)
G 6.35 = Glass 2-Pin, Pin Dia is 1mm, at 6.35mm oc. 7.5mm Long (?Same as GX6.35 &GY6.35) IEC #7004-73, ANSI #C61.61-1990sheet 1-340-1, Leviton Base #80054-200 & 80054
G 6.35/15x19 = 2-Pin, Pin Dia is 1.6mm, at 6.35mm oc.
GX 6.35 = Glass 2-Pin Base Pin Dia is 1mm and 7.5mm Long. (?Same as GX6.35 &GY6.35) IEC #7004-73, ANSI #C61.61-1990sheet 1-340-1
GY 6.35 = Glass 2-Pin Base with 6.35mm oc. bet. pins and 0.44" wide base. Pin Dia. is 1.25mm at 7.5mm Long.
(?Same as GX6.35 &GY6.35) IEC #7004-73, ANSI #C61.61-1990sheet 1-340-1, (Leviton Base #80054-200, 80054 & 80053)
GZ 6.35 = Round 2-Pin Base, Sloped Sides to Base, Pin Dia is 1mm, at 6.35mm oc. Pin Length is 6mm. DIN #49754, IEC #7004-59A
G 7.9 = Standard 120v Base at 90° off Axis, 7.92mm oc. pin dia. is 2.4 & 3.2mm
GU 7 = Twist & Lock Base, MR-16 12v (Sym. to Fluorescent Starter Canister)
GX 7.9 = 2-Pin (TB-2P & 2Pin Ven) Low Voltage Lamp Base at 90° off Axis, 7.92mm oc. pin dia. is 2.4 & 3.2mm
G8 = 2-Pin with pins 8mm. on Center
G9 = Bi-Pin Base w. Pins 9mm oc. 4.4mm Long and 0.5mm in Dia.
G9.5 = Medium 2-Pin (w. Heat Sink for HPL)3/8" o.c. bet. Pins / 9.53mm oc. Bet. Pins 15/16" at top of Skirt and 24mm wide at horz. width Pin Dia is 3.17mm at 11.4mm long. (LCL at Bot of Ceramic/Alum Base - Where Pins Come Out)
GX9.5 = Skirted Medium Prefocus 2-Pin Pin dia is 3.2mm x 8.4mm Long, 9.5mm oc. (LCL at Bot of Ceramic Base - Where Pins Come Out) Note: Porc. Alignment/Spacer Pegs coming out of Base at Bot. This 9.5 Base is Larger Rectangle than GY base, with Center Alignment Slot Pn Dia is 3.17mm DIN #49638, IEC #7004-70A
GY9.5 = Skirted 2-Pin Medium Prefocus Pin Dia is 3.2mm & 2.4mm, at 9.53mm oc. Pin Length is 8.6mm, Skirt Width is 30mm. (Higher Wattage) (Base Makes Cross Shape) (LCL at Bot of Ceramic Base - Where Pins Come Out) (Smaller Shape than GX 9.5) IEC #7004-70B, AnSI #C81.61-1990sheet 1-369-1.
GZ 9.5 = Pins are two different Dia. 3.2 & 2.3mm Dia. 8.6mm Long Porc. is 24mm Wide. 2-Pin Prefocus (LCL at Bot of Ceramic Base - Where Pins Come Out)
GZX 9.5 = Lamp Base w. 9.5mm oc. pins 3.2mm Dia, 8.6mm Long and on Center a Large Valley in Porc. Socket bet. Pins. approx 8mm Deep
GZY 9.5 = Lamp Base w. 9.5mm oc. Pins 3.2 & 2.3mm Dia, 8.6mm Long and on Center a Large Valley in Porc. Socket Bet. Pins appx 8mm Deep
GZZ 9.5 = Lamp Base w. 9.5mm oc. Pins 2.3mm Dia, 8.6mm Long and on Center a Large Valley in Porc. Socket Bet. Pins appx 8mm Deep
GZ 10 = 2-Pin Base, w. wide T-shaped pins. (Same type of pins as on Fluorescent Starter), GU 10 bases can be used with GZ 10 bases.
GZ 10 = 2-Pin Base, w. wide T-shaped pins. 7mm Long (Same type of pins as on Fluorescent Starter), GZ 10 bases cannot be used with GU 10 bases.
G12 = SE. MH, 150w, Bi-Pin Base 12mm oc. 2.4mm Dia pins, 11.4mm Long. Leviton Base #557, Pulse Rated
G12.7 = Med. Side Prong (MSP)
G13 = Medium Bipin
GY16 = 2-Pin Prefocus Pin Length is 16mm, Pin Dia. is 4.8&3.2mm, at 16mm oc. (LCL at Bot of Ceramic Base - Where Pins Come Out)
GX16d = 2.1/16" wide, Mogul End Prong 31/64" high, Pin oc. is 16.6mm, and 13.6mm Long or (EMEP) Extended Mogul End Prong, Double Contact 1.1/4" high
G17t = 3-Pin Prefocus
G17q = 4-Pin Prefocus (Sym in shape to GX17q) Pins 1&4 are Hot DIN #49665, IEC #7004-45, ANSI C81.61-1990sheet 1-440-1
GX17q = 4-Pin Prefocus (Low Voltage) Pins 1&4 are Hot.
G20 = Mogul Bipin
G22 = Medium Bipost 7/8" o.c. Bet. Pins / 22mm o.c. Bet. Pins, 5/8" Length Pin Dia is 6.35mm (LCL at Bot of Ceramic Base - Where Pins Come Out),
IEC #7004-75, ANSI #C81.61-1990sheet 1-466-1
GY22 = Bi-Pin Lamp Base, with 26mm pins, 9.1mm & 6.4mm Dia. Pins 22mm oc. Ignition voltage must be applied to the thin pin.
G22+Cable = G=22 base with ring terminal & cable from top of lamp. Pins are short circuited together, the electrode furthest from base must be connected via cable.
G23 = Compact Fluorescent Lamp Base 9wPL-s/BAX type w. Single alignment ridge. & 2 Contact Pins on line
GX23 = Compact Fluorescent Lamp Base, w. Double alignment ridge., & 2 Contact Pins on line
GX23-2 = Compact Fluorescent Lamp Base, same as GX 23, but with larger lamp base tube support.
G38 = Mogul Bipost Pins 1.1/2" o.c / 38.1mm o.c. and Pin Length 1.1/8" Pin Dia is 11.1mm (LCL at Bot of Ceramic Base - Where Pins Come Out) IEC #7004-76, ANSI #C81.61-1990sheet 1.519-1
G53 = Multi-Purpose, quick disconnect and 6-32 Screw Thread terminal on PAR 36 or AR-111 lamp.
K = Unique Base
KPR = Krypton Gas, Pre-focus base.
Knurled Screw = sym to SFc/ SFa Lamp Base. with Screw & Nut End. Nut is 0.38" Dia. & 0.29" Long
LHT = Left-hand threaded medium lamp base.
MB = Miniature Bayonet
Med.NP = Med. Screw, Nickle Plated Brass Base
MEP = Mogul End Prong
M-23 Bi-Pin = TL-1.1/2 Bulb with pins9/64"oc. (3.57mm)
Miniature 2-Pin = Sym. to G-5 Lamp base, but pins are 3/16" o.c. (4.76mm)
Miniature Flanged = Sym. to BA9s, w/o bayonet lugs, has 0.533" Dia. Prefocus Flange bet top of base and lamp. Base Length is 0.61".
MP = Multi-Purpose Terminal - Mainly used on non-headlamp PAR applications. This base is designed to accept both slip-on and screw lugs.
MSP = (G-12.7) Medium Side Prong, 1.7/16" Dia Brass Base with Plug Prongs off to side
NPBB = Nickel-Plated Brass Base
P = European Designation
P14.5s = Single Contact Bayonet Prefocus w. Alignment Shield, Length bet. Base & top of Alignment Shield is 18.5mm
P28s = Medium Prefocus Single Contact 1.1/16" (27.4mm) Dia. 25mm Long, and 33.5mm Wide at Skirt. (LCL at Top of Base Fins) DIN #49728, IEC #7004-42, ANSI #C81.61-1990sheet 1-700-1
P30s = SC Pf, Candelabra Prefocus Single Dontact (LCL at Top of Base Fins)
P30d = DC Pf, Candelabra Prefocus Double Contact (LCL at Top of Base Fins)
P40s = Mogul Prefocus Single Contact 1.1/2" (39.5mm) Dia, 2" Dia at outside of Fins. (LCL at Top of Base Fins)
PC = Printed Circuit Application.
PG12 = HPS Lamp, Leviton #558, Pulse Rated (Sym. to G12)
PG22-6.35 = Shielded Pre-Focus Base with Dual Bi-Pin G6.35 Pins, (6.35mm o.c.) DIN #49751, IEC #7004-48
PO E-39 = Position Orientated E-39 Mogul Base.
POMB = Position Orientated Mogul Base.
R7s / RSC/R75 = Recessed Single Contact, Recessed Concave Contact (Behind Porc. Insulation) 9/32" Dia. Porcelain Ferrule. Pinch Measures 8mm x 18mm.
DIN #49750, IEC #7004-92, ANSI #C8.61-1990sheet 1-770-1 (See LL Below for LCL)
R17d = Recessed Dual Contact
RT = Cable Terminal Type with Round Terminal
RX7s/RSC = (R75) Recessed Single Contact, Pinch Measures 9.14mm x 22.4mm Leviton #554 Front Flange & 555 Rear Flange, 555-121/021 & 554-121/021 are For MH Lamps, 554/554-100 & 555/555-100 are for Quartz Lamps
R7s-12 = RSC Lamp Base w. Porc. Recess Support Dia of 7mm & 12mm dia at widest point (Pinch) where Lamp Base meets lamp Glass
R7s-18 = RSC Lamp Base w. Porc. Recess Support Dia of 7mm & 18mm dia at widest point (Pinch) where Lamp Base meets Lamp Glass
Rigid Loop = RSC type Lamp Base with wire lead loop contact in crimped bulb end at ends as opposed to concave contact in porcelain
“S” = The few SC and DC Prefocus Base Lamp s with a “s” designation are special in that the collar location and or the orientation of the contacts differs from the standard “A” or “B” contact to collar distance.
SC Pf = Single Contact, BA type based lamp with large Pre-Focus fin instead of Lugs. 1.18" Dia to outside of Wing, 0.8" Long Base.
Screw Terminal = 7/8" o.c. Ferrules
SF Wedge = Sym. to DF Wedge, but w. single contact.
SFa = Base w. Cable or Base With Hollow For Cable or Rod to be mounted in with a set Screw to Retain it. (1st Number is Skirt, Second Number is Set Screw Mount.)
(SFa15-10, SFa16-8, SFa16-10, SFa20-8, SFa20-10, SFa25-10, SFa27-8, SFa27-10, SFa27-11, SFa27-12, SFa27-14, SFa28-18)
SFa21-12 = Mult. Dia. Xenon Base w. 21mm Skirt & 12mm Pin.
SFaX = SFa Lamp Base w. Countersunk Flat and Side Post (SFaX27-10, SFaX27-9.5, SFaX27-12, SFaX27-13, SFaX27-14, SFaX30-9.5, SFaX30-16)
SFc = Screw End on Anode Side of Lamp (SFc 10-4, SFc 6-3, SFc 12-4, SFc 13-4) All Have 1.6mm Wide Alignment Slit and The First Number in its Code Representing the Skirted Dia. the Second Number Representing The Post or Threaded Screw Dia. in Metric SFc25-14 & SFc27-14 have Threaded Stud End w. Nut of Same Skirt Dia.
SFcX 12-4 = Threaded End Post 12mm Skirt w. M4 Thread.
SFcX 27-8 = Threaded M-8 Xenon Lamp Base w. 2 Side Posts. 27mm at Skirt.
SK = Skirted Base Found on Mini-Can & PAR Lamps
SK 27-50 = Xenon Lamp Base w. Side Post off to One Side, both for Contact But Usually Base/End of lamp For Support and Cable Crimped Side Post for Power.
Slide #1 = Pointed Base, w. contact wings off to side of lamp body, 1.27" long base tip to end of contact.
Slide #2 = Pointed Base, w. contact wings off to side of lamp body also extending on sides of tip material, 1.2" long base tip to end of contact.
Slide #3 = Pointed Base, w. contact wings off to side of lamp body also extending on sides of tip material, sym. to Slide #2 in all ways.
Slide #5 = Flat Base, w. contact wings on sides of tubular bulb body. 0.65" long base end to tip ends of contacts.
Slide #6 = Flat Base, w. contact wings on sides of tubular bulb body. 0.6" long base end to tip ends of contacts. sym to Slide #5 but narrower
Special Screw = 0.187" Dia. 0.3" Long. Short fine screw thread and larger porcelain body to base.
T = Cable Terminal type lamp base, with straight faston terminal.
T-3/4 = Micro-Midget Flanged Base, Body 0.123" Dia., Length from bulb to tip of single contact 0.13".
T-3/4 = Bi-Pin with pins 0.05" spaced, and lamp base 0.096" wide.
T-1 = Sub-Midget Flanged Base, Body 0.158" Dia., Length from bulb to tip of single contact 0.16".
T-1 = Bi-Pin with pins 0.5" spaced, and lamp base 0.124" wide.
T-1 = Bi-Pin 100, with pins 0.1" spaced, and lamp base 0.124" wide.
T-1.1/4 = Special-Midget Flanged, Body 0.185" Dia., Length from bulb to tip of single contact 0.33".
T-1.1/4 = Bi-Pin with pins 0.1" spaced, and lamp base 0.124" wide.
T-1.3/4 = Midget Grooved\, Body 0.235" Dia., Length from bulb to tip of single contact 0.335".
T-1.3/4 = Bi-Pin with pins 0.124" spaced, and lamp base 0.23" wide.
T-1.3/4 = Glass Wedge, 0.2" wide. glass tip at bottom & contact rails on sides of glass bulb.
T-3.1/4 = Glass Wedge, 0.37" wide. small glass tip at bottom & contact rails on sides of glass bulb.
T-5 = Glass Wedge, 0.37" wide. glass tip at bottom & contact rails on sides of glass bulb. Note: contact rails are the same shape.
TP = Base w. Threaded Pin
TM = Threaded Pin w. Modified Thread
Wedge - Sym. to G-4 Lamp Base, but without pins. Contacts are flush in the glass. Leviton Base #562,562-800 562-001, 562-002, 562-003 & 562-005
Wire lead Lamp Bases. = Heat, humidity and mechanical loads place high demands on airfield lamps, yet these lamps have to be easy to adjust and replace. Osram lamps with cable connections and cement free prefocusing bases have been designed to meet all these requirements. By moving the electrical contacts away from the lamp base, we have been able to reduce significantly the risk of the base or seal overheating as a result of electrical contact resistances. The prefocusing base greatly reduces the need for adjustments by the housing manufacturer and by the end user. Overall, these features lead to improved electrical contact and excellent reliability.
Or did you want something different from elsewhere in notes? I literally almost every day of the week, and took my vacacations from 2000-2010 in spending my time reading books and lamp catalogues, than copying everything useful into lamp tables or notes. Page by page. I learned how to type really fast.
My updating of notes since married and child have fallen off since than but still get upgraded once in a while.
Last edited:
A funny little aside story: When I was in High School, my next-door neighbor was the chief engineer of NYC water tunnel # 3 (850' below ground). His company inherited the project from a previous contractor who defaulted. The previous contractor, in a supposed effort to prevent light bulb theft by workers (there was 13 miles of lights strung in the tunnel ), used reversed threaded type-a lamps and sockets. The problem was everyone was stealing them because a reversed threaded lamp is novel and a great practical joke to sneak them into a package of regular lamps. There was also only one vendor in the world for reversed threaded lamps, so they ended up costing 10x as much as a normal lamp. They didn't want to change out 13 miles of bulbs and sockets, so they were kind of stuck with the silly reverse threaded ones.
I wish I could still locate my reversed-threaded lamp...but I think is was lost in a move many years ago...too bad
I wish I could still locate my reversed-threaded lamp...but I think is was lost in a move many years ago...too bad
tjrobb
Well-Known Member
FWIW, where I was working pre-dates NEMA (which started in 1930). Found this out when I had to blank a box off and the plate doesn't fit. Ended up with 1/8" Luan painted to match the wall, drilled to match the screw tab spacing.
Also, same place I found their original house lights, mogul screw base 1kW incandescent PC's. Several of the lamps still run, but I wasn't willing to run them for long! [The soft glass actually started to deform downward from the heat].
Also, same place I found their original house lights, mogul screw base 1kW incandescent PC's. Several of the lamps still run, but I wasn't willing to run them for long! [The soft glass actually started to deform downward from the heat].
