I have a small event going in next week, the electrician who will be doing the tie in is out of the country, and I need to get my shop pull sheet in by end of business today....The venue has a 4wire 200A panel installed (with breaker), so am I correct in providing him 5wire Camlok tails? This will be hooked up directly to an ETC 12ch 2kW sensor rack. I'm assuming he'll just bus together the neutral and ground, but I want to make sure I'm providing him with the right thing. The venue production manager assured me events use that panel to power distros and dimmers all the time, so I think I'm on the right track with the cam tails. I can always do a last minute run to the shop but I'm hoping to avoid that. Thanks!
Quick feeder question
- Thread starterjstroming
- Start date
The worst-case scenario is that one of the wires is not used.
Is it a two-pole or three-pole breaker? I suspect a "4wire 200A panel" would be HHNG, 120/240VAC 1Ø, split-phase.
No. Connecting the ground and neutral together may only be done at the service entrance (where power enters the building) and no where else.
Either the dimmer pack needs to be set-up in the shop for 120/240VAC 1Ø leaving the center input unused, OR two of the three hot legs tied together.
To cover all your bases, I'd include on the shop order:
1 set 2/0 tails
1 set 10' rack jumpers
1 ea. Tee, paralleling
1 ea. Tee, tapping
2 ea. Cam-lok turnaround, MM
2 ea. Cam-lok turnaround, FF
Based on what I see in the pic, either it's single phase and neutral is fused, or it's 3 phase and it's missing either a neutral and ground. Both are an issue unless it the fused neutral set up to trip the hots should the neutral trip. Neutral and ground are not interchangeable from a safety standpoint on line voltage circuits unfortunately...
bishopthomas
Well-Known Member
JD
Well-Known Member
Looks like there are three hots, a nuetral top left and ground bottom left, operative phrase, looks like. If possible bring a lug for the ground tap. I would suggest they take another picture showing the entire box so we can see the taps on the left. The lug top left is isolated from the box so I am assuming it's a nuetral. The bottom left is probably a ground but you can't tell if there is a lug or not.
ejsandstrom
Member
Sorry for the mini-rant, but coming from a power gen back ground, so many times questions here are answered with a just give him this or do that.
From the picture we know nothing. 3phase 200a comes in all flavors.
It could be
120/208
120/240
277/480
or even some other bastardazation there in. Just be cause someone says the last guy plugged in here is no reason to not know 100%.
A phrase that kills is "the last guy did it".
I have seen 20 year union electricians mix up the line and load line in a transfer switch. I have also had to pick up the pieces afterword.
Why take the chance?
How about "I am sorry, I do not know exactly what you need and until I have all of the information I need, I cannot give you an answer." anything other than that and you are taking to many chances, at best you blow up a dimmer rack, at worst....look up arc blast on youtube for the worst.
From the picture we know nothing. 3phase 200a comes in all flavors.
It could be
120/208
120/240
277/480
or even some other bastardazation there in. Just be cause someone says the last guy plugged in here is no reason to not know 100%.
A phrase that kills is "the last guy did it".
I have seen 20 year union electricians mix up the line and load line in a transfer switch. I have also had to pick up the pieces afterword.
Why take the chance?
How about "I am sorry, I do not know exactly what you need and until I have all of the information I need, I cannot give you an answer." anything other than that and you are taking to many chances, at best you blow up a dimmer rack, at worst....look up arc blast on youtube for the worst.
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