480 volt lighting. What a pain....

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Talked the customer into using one switch for all the lighting. So a 2 gang switch plate with a toggle switch blank for my fubar and we're rollin' again!
 
kwired said:
Are you guys confused with maybe 408.8(B):



I sure hope you can install separate switches in separate boxes, otherwise all the switches in a particular building would all have to be in same box - sounds pretty inconvenient for the user in most cases.

I don't think this section would apply to a switch rated for 480 volts unless there is one that is considered a general purpose snap switch and not a manual motor controller. Only ones I have seen are called motor switches or something of that nature and are rated for 600 volts, 1, 2 or 3 pole.
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Okay, I must be on the 2008 code because I do not have 408.8(B). I think you meant 404.8(B)? I knew about that reference, how does that apply to installing 1 switch in one box and one switch in another? Which was my original suggestion.
 
A check of the UL White book will reveal that contactors marked as 'definite purpose' contactors have not been evaluated for lighting loads. Only units marked as 'lighting contactors' are.

Indeed, there are a whole variety of uses for which the 'definite purpose' contactor has not been evaluated. It appears that 'definite purpose' really means it's not good for much at all!

I don't make this stuff up, I often think a lot of it is a crock, and it should surprise no one that engineers are terrible authors .... but facts are facts.
 
rich000 said:
Okay, I must be on the 2008 code because I do not have 408.8(B). I think you meant 404.8(B)? I knew about that reference, how does that apply to installing 1 switch in one box and one switch in another? Which was my original suggestion.
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You are right, art 404 not 408. I think it was just a typo, as I quoted the correct article.

I don't get what jusme123 thinks is wrong with separate switches in separate boxes. That is what I was trying to provide information about.
 
renosteinke said:
A check of the UL White book will reveal that contactors marked as 'definite purpose' contactors have not been evaluated for lighting loads. Only units marked as 'lighting contactors' are.

Indeed, there are a whole variety of uses for which the 'definite purpose' contactor has not been evaluated. It appears that 'definite purpose' really means it's not good for much at all!

I don't make this stuff up, I often think a lot of it is a crock, and it should surprise no one that engineers are terrible authors .... but facts are facts.
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j
I guess I should not be suprised that a device that has both a resistive and hp rating would not necessarily be suitable for lighting loads.
 
renosteinke said:
A check of the UL White book will reveal that contactors marked as 'definite purpose' contactors have not been evaluated for lighting loads. Only units marked as 'lighting contactors' are.
Click to expand...

I don't agree with this. I've been doing some looking and the so-called "lighting contactors" I have found, have a UL listing in the white book that says nothing about lighting. They all seem to be listed under non-motor loads.

Also every "definite purpose" contactor I have found UL listed uses the same listing as a standard motor starter.
 
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