277-120 transformer

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readydave8

readydave8

re member
Location
Clarkesville, Georgia
Occupation
electrician
Out of comfort zone

Customer installing 80w bug zapper, wants transformer and 120v receptacle fed from nearby exit sign

So do I need 2.4 kva or more transformer?

Do I need a subpanel and breaker?

Sorry I don't have any more information, but might could get some general answers so as to know what direction to proceed
 
readydave8 said:
Out of comfort zone

Customer installing 80w bug zapper, wants transformer and 120v receptacle fed from nearby exit sign

So do I need 2.4 kva or more transformer?

Do I need a subpanel and breaker?

Sorry I don't have any more information, but might could get some general answers so as to know what direction to proceed
Click to expand...
Is the exit sign really 277V
 
Does the customer want a 120V outlet? Or do they want a bug zapper and think that it has to plug in?

Does the customer want a _zapper_ or would one of the UV lights with glue boards work?

Is the exit sign on a general purpose 277V lighting circuit...or is it some sort of emergency circuit?

Some thoughts:

If you get rid of the receptacle, then you eliminate any problems with someone trying to use that receptacle at higher power than you design for. I don't think that there is an explicit requirement that a receptacle be able to actually supply 15 or 20A, but you can be certain that if there is a receptacle someone will plug something in. (Case in point, some LED shop lights have receptacles that let you 'daisy chain' the lights. They are rated for about half an amp. Guess what happens when a handyman needs to plug in a drill.....)

The glue type units use fluorescent lamps with ballasts; ones with 277V ballasts are probably available (in fact it would not surprise me if now they simply have universal ballasts because those are so common).

-Jon
 
winnie said:
Does the customer want a 120V outlet? Or do they want a bug zapper and think that it has to plug in?

Does the customer want a _zapper_ or would one of the UV lights with glue boards work?

Is the exit sign on a general purpose 277V lighting circuit...or is it some sort of emergency circuit?

Some thoughts:

If you get rid of the receptacle, then you eliminate any problems with someone trying to use that receptacle at higher power than you design for. I don't think that there is an explicit requirement that a receptacle be able to actually supply 15 or 20A, but you can be certain that if there is a receptacle someone will plug something in. (Case in point, some LED shop lights have receptacles that let you 'daisy chain' the lights. They are rated for about half an amp. Guess what happens when a handyman needs to plug in a drill.....)

The glue type units use fluorescent lamps with ballasts; ones with 277V ballasts are probably available (in fact it would not surprise me if now they simply have universal ballasts because those are so common).

-Jon
Click to expand...

I have not been to jobsite (wire-man that works with me has) and apologize for not having more information

Bugzappers are already installed, done by pest control company, I may be mistaken but it sounds like they contracted the work and did not think about where to plug them in

Yes I thought about hardwiring but assume that I could create UL and warrantee problems if I cut off cord cap

So we're bidding $6k+ for 8 duplex receptacles and hoping for the best
 
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