Recent content by mrb

oops youre right in that its not the same as single phase, but its still not two phase. Should also be noted that the neutral on a circuit with 2 hots derived from a 3ph wye service carries more current than the phase imbalance and is considered a current carrying conductor.

no. two hots off a 3ph service is considered single phase. Two phase is an entire different animal. Heres a wikipedia article on it Two-phase electric power - Wikipedia, the free encyclopedia

:grin: two phase power has 4 hot wires, basically two seperate single phase windings that are in sync. Was used at the dawn of commercial power to run motors. I think niagra falls output 2 phase and I know it was used in san francisco. Most utilities have done away with it but there is a...

you want the 120/208 WYE. There is no such thing as 220v in the usa. There is 240V 3ph Delta which comes in two flavors. Regular delta has 3 hots only and you will not get 120v from it. Then there is center tapped delta which is basically a 120/240v service with a third 240v leg. Also referred...

the molded soco connectors I have seen are just regular soco connectors overmolded. Whats different than the grounding? Do you have a picture of one of the ones you are talking about before molding?

perhaps wire up a circuit on some perfboard with a 1:1 op amp and replicate the voltage divider circuit with lower value resistors on the input side. VD isnt going to be a problem, you would be in the low tenths of a volt at 20ma with 120ft of 24ga this is based on my assumption we are NOT...

are the unused conductors in the cat5 floating or grounded? The issue I see (however im no EE) is the high value resistors. You only have a fraction of a milliamp flowing, it seems as though reducing the value of the resistors (while keeping proper proportions) would increase noise immunity.

utility installations are not governed by the NEC. iirc traffic signals also use green for something other than the EGC

there is also the consideration for exit signs and egress lighting. does installation of this new dimmer rack trigger the current (for some time now iirc) requirement that these be powered from the same source as the house lights?

Multicable of that sort is not UL listed (its ul recognized AWM) and as such cant even be hardwired into a building....

wire a neon indicator light across each bulb, when one burns out its indicator will light. That saves a ton of trouble finding the burned out lamp.

i did something similar once with a couple hundred fixtures in a walk through art gallery / museum environment. Used a TON of cube taps and 6 and 12ft black molded extension cords. That was when pacific electricord was still around and we cleaned them out of all their black molded extension...

another problem with the ENR is the airflow sensor in the control module. Dust builds up on it and the control module flashes all the dimmers on and off. The sensor is fragile, clean it only with clean dry air.

Re: Chamsys MagicDMX For Rent?across the ocean? PRG is the USA distributor for Chamsys, dont they have one in stock?

seems the point of the thread is to spam CB with his company if I was going to buy LED fixtures, i would buy them from Bill @ ESC Entertainment systems corporation as he is an active member of this forum who makes many contributions and has a solid track record.