What Voltage is this Panel?

[jar546]

This is an easy one. What section of the code covers this?

 

[Paul Sweet]

My guess would be 120/208. There is no orange wire for a stinger, and 277/480 often uses other color conductors.

 

[jar546]

My guess would be 120/208. There is no orange wire for a stinger, and 277/480 often uses other color conductors.

I would think that you are correct.

 

[wwhitney]

I would think that you are correct.

But that is a guess only, as I don't see a voltage label (didn't zoom in). I'm not ware of anything in the NEC that requires a voltage label for every panelboard, although I'm not sure I didn't overlook something.

NEC 408.58 requires the panelboard to be marked with its voltage rating, but that doesn't mean the system voltage matches that, it could be less.

If the premises has branch circuits of more than one voltage system, then 210.5(C)(1) requires a premises identification system for the different voltage systems, and that it be posted at each panelboard supplying branch circuits, which would identify the voltage system at that panelboard. But if there is only one voltage system, or if a panelboard supplies only feeders, the identification system would not need to be posted.

Cheers, Wayne

 

[jar546]

But that is a guess only, as I don't see a voltage label (didn't zoom in). I'm not ware of anything in the NEC that requires a voltage label for every panelboard, although I'm not sure I didn't overlook something.

Industry standards, state, & local amendments to the code are the only reason you see the color codes.

210.5 Does not mandate specific colors.

 

[Norcal]

You should never rely on colors, there are the idiots who use green as a hot/ungrounded conductor, always test.

 

[jar546]

You should never rely on colors, there are the idiots who use green as a hot/ungrounded conductor, always test.

Excellent point