Can Wires pass through Linked Subpanels

Merry Christmas
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Smart $ said:
Ummm... phasing is generally accepted to be
  • A - Black
  • B - Red
  • C - Blue
  • N - White
Your wiring "appears" to have B and C phases reversed.
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That is only "IF" the POCO got the phase rotation correct at the meter.If your POCO is pacific gas and electric , it is my experiance with them they tend to only get phase rotation correct by accident.
 
allenwayne said:
My question is why is the panel on the right slap full of breakers that aren`t being used.Seems like a waste of $$$$
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It has been my experience that bolt on panels are commonly spec'd to be filled with breakers, even if they are unused. I have an opinion on why that specification typcially exists, but I might be wrong. I feel that practice encourages more work in hot panels than may not have otherwise been done if there were no spare bolt-on breakers in the panel.
 
hardworkingstiff said:
What happened to Orange ID for the high leg?
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Believe me, its a bone of contention for me.... You walk up to a service, or for that matter any panel or box, and you find a rainbow various colors on different phases with high-legs due to changing local codes and out of towners at various evolutions of install. Black red blue - black orange blue - black orange red - black red orange - black blue purple - black red purple - black purple blue and black purple red...

Its rather dangerous but forces you to break out a meter - as you should... :wink:
 
e57 said:
Its rather dangerous but forces you to break out a meter - as you should... :wink:
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I'm working on a building survey and found that all the 120/208 volt panels and equipment are using brown orange yellow for phase wiring, and all the 480 volt panels are using black red blue .Some of the 480 panels were using blue colored wire as the feeder conductors.
Rick
 
Hardworking,
What happened to Orange ID for the high leg?
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The code does not actually require the use of orange for the high leg.
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is orange in color or by other effective means.
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Don
 
bending radius

bending radius

Bending Radius;
armored cable 320.24
flex metal conduit348.24
over 600 v 300.34
lead covered 300.34
metal clad 330.24
MI cable 332.24
NM 334.24
 
RUWired said:
I'm working on a building survey and found that all the 120/208 volt panels and equipment are using brown orange yellow for phase wiring, and all the 480 volt panels are using black red blue .Some of the 480 panels were using blue colored wire as the feeder conductors.
Rick
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Guess I better not come to PA, cause we use brown, orange, yellow for 480v as do most of the others in the area, when it is IDd at all.
 
BOY and BRB are trade practices and are not NEC required, other than by local code and job specs. If the customer spec'd brown, pink and purple for 120/208 and black, orange and red for 277/480, that would be perfectly legal even if it's very strange.
 
acrwc10 said:
That is only "IF" the POCO got the phase rotation correct at the meter.If your POCO is pacific gas and electric , it is my experiance with them they tend to only get phase rotation correct by accident.
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I too will vouch for this opinion to be remarkably true.... Phase rotation is inside responcabilty even if they are reconnecting it would seem in thier opinion.
 
Welcome to the forum Dispect, I see your from MA as well.

Dinspect said:
I'am concerned that there is no ground bar for these panels ?
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I do not see any reason those panels would be required to have EGC bars.
 
Dindpect,
Dear Cgrafx, I'am looking at your two panels I'am concerned that there is no ground bar for these panels ?
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I don't see any green wires and if there are none, then a ground bar is not required.
Don
 
Dinspect said:
Dear Cgrafx, I'am looking at your two panels I'am concerned that there is no ground bar for these panels ?
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the installation is 208 three phase.

Although not clearly visible in the picture, there was a ground wire pulled with the service wires. I assure you it is securly attached to the panel on the left. The panel on the right is grounded through the two 2in interconnects.

The second sub-panel feed exiting the right side panel has a ground rod at the far end of feed, as I didn't want to rely on a ground through 300+ feet of cable and two connections.

thanks for the comment though. One can never be to careful and having extra assistance on this as been very valuable.
 
don_resqcapt19 said:
Dindpect,

I don't see any green wires and if there are none, then a ground bar is not required.
Don
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I agree with Don and Bob, why would you need a ground bar if there are no grounds?
 
I held the thread for a few hours, my apologies to cgrafx.

cgrafx said:
The second sub-panel feed exiting the right side panel has a ground rod at the far end of feed, as I didn't want to rely on a ground through 300+ feet of cable and two connections.
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Could you please explain this in more detail? It sounds as though you've removed the fault-clearing path, in the event that a hot conductor touches the grounding conductors on the load side of the distant feeder...?
 
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