210.6(D)(2)

[anbm]

Circuits exceeding 277 volts, nominal, to ground and not exceeding 600 volts, nominal, between conductors shall be permitted to supply the following:

(2) Cord-and-plug-connected or permanently connected utilization equipment other than luminaires.

I assume this meant indoor lights cannot be powered from 480V single phase circuits?

 

[infinity]

Is this from a 480Y/277 volt system? Would a 480 circuit exceed 277 volts to ground?

210.6(D) 600 Volts Between Conductors. Circuits exceeding
277 volts, nominal, to ground and not exceeding 600 volts,
nominal, between conductors shall be permitted to supply the
following:

 

[Dennis Alwon]

I agree, It appears to state that luminaires cannot exceed 600v so 480v would be allowed.

 

[infinity]

I agree, It appears to state that luminaires cannot exceed 600v so 480v would be allowed.

480 volts would be allowed if the system were as I mentioned 480Y/277. If you had a corner grounded 480 volt system then the voltage to ground would exceed 277 volts with a voltage between conductors of 480 volts.

 

[anbm]

Is this from a 480Y/277 volt system? Would a 480 circuit exceed 277 volts to ground?

Yes, 480Y/277V system, never use 480V-single phase lights for indoor lighting, but curious about the rule...

 

[infinity]

Yes, 480Y/277V system, never use 480V-single phase lights for indoor lighting, but curious about the rule...

Cool so there it is.

If you have one system (480Y/277) then there is no restriction if you have the corner grounded 480 volt system then you cannot do it.