120V max in dwelling occupancies

[mguzik]

Is the use of 277V lighting fixtures in a dwelling occupancy a violation of NEC 210.6 (A) and would it be allowed by any other code section like NEC 410?

 

[480sparky]

Where do you get 277v in a dwelling?

 

[Dennis Alwon]

The way I read it is that you cannot use 277v for lighting in a dwelling based on 210.6 (A). Article 210.6(C) alows 277v but I take that to mean in non residential if it met the following choices listed.

 

[Dennis Alwon]

If these are condos then I believe the 277 may be used outside the building for the exterior lights.

 

[norcal]

Where do you get 277v in a dwelling?

When you have a bootleg MIL unit attached to a shop w/ a 480Y/277V service, I kid you not........


The electrical is a sight to see

480V submersable pump, see anything wrong? With the other 2 it's easier to ask if anything is right.

 

[480sparky]

If these are condos then I believe the 277 may be used outside the building for the exterior lights.

Seems it would be a poor design to install a 277/480v service for a handful of wall packs, then have a humongous 480-120/208 transformer to run 99.99% of the load.