210.8(B) RECEPTACLES RATED 150V TO GROUND OR LESS

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DrewH

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Kennesaw, GA
In 2017 NEC 210.8(B) now refers to single phase receptacles rated 150 volts to ground or less. I am not familiar with a single phase receptacle being rated in this way. Usually I see ratings like system voltage they are rated for like 250VAC OR 125VAC. The reason I ask is I have an application with a single phase 250VAC rated receptacle on a 208VAC system. It is wired L-L with a ground conductor. Obviously either L to ground would measure approx 120v to ground, but this would not mean the receptacle is rated 150 volts to ground. I wonder if they are trying to say that my 250V rated single phase receptacle now has to have GFCI? Any ideas?

thanks!!
 
DrewH said:
I appreciate your feedback. Is it your understanding that the 250V receptacle is rated 150V or less to ground? It is the 'rated' terminology that is throwing me.
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250v is 125v on each leg--
125v is 125v from hot to ground. Therefore a 250v receptacle is rated 150v or less to ground... To ground- that is the key words.
 
The wording is very poor and it references a receptacle rating that does not exist and the section is not really valid.

The intent is to have GFCI protection for receptacles rated 50 amps or less that are installed on single phase circuits that are supplied by a system that has a voltage to ground of 150 volts or less.
 
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