NEMA L5-30R???

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llrodriguez

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A NEMA L5-30R recept is rated for 125v, 2 pole, 3 wiring grounding. Does this not mean that a 2 pole breaker needs to installed for it?

A contractor wired the rect for 208v since he saw the 2 poles on the panel schedule and the UPS that was supposed to use the L5-30 got fried when they plugged it in. A L5-30 was specifically called for on design plans.
 
Re: NEMA L5-30R???

Linda
According to my book an L5-30R is 125 volt. There would be no place to connect a second hot leg. It has a hot, a neutral, and a ground. It would be fed with a 30 amp 1 pole breaker.
Jim T
 
Re: NEMA L5-30R???

A NEMA L5-30R recept is rated for 125v ... A contractor wired the rect for 208v since he saw the 2 poles on the panel schedule ...
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Looks like there are two problems here. It appears that the drawings were in error and specified a 2 pole breaker to feed this receptacle and the electrican did not catch the error.
Don
 
Re: NEMA L5-30R???

I find it hard to believe that a journeyman electrician would not see that silver screw and know something was wrong.My guess is that one man made up the panel and another installed the receptacle.Or this is the result of letting helpers do jobs they are not ready for.Costly mistake i am sure.
 
Re: NEMA L5-30R???

I wonder if this receptacle was suposed to be wired to a 120/60 volt isolated technical power supply? If it was then it would have been connected to a two pole breaker. As I noticed it was for a UPS.
 
Re: NEMA L5-30R???

With the mention of "two poles on the panel schedule" and a UPS, could it have actually been calling for a "Shunt Trip Breaker" and just indicating two spaces used.

Just a thought.

Roger
 
Re: NEMA L5-30R???

Whoever installed it should of at least looked at the color of the screw's. If it was only 125v then one screw would have been silver.
 
Re: NEMA L5-30R???

Wayne,
I wonder if this receptacle was suposed to be wired to a 120/60 volt isolated technical power supply? If it was then it would have been connected to a two pole breaker. As I noticed it was for a UPS.
Click to expand...
Why would the supply to a UPS be from a technical power supply?
Don
 
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