electricalist
Senior Member
- Location
- dallas tx
On another thread I had stated the lithonia rep told our inside sales guy that with LED drivers the amperage does not change. He is wrong. We hooked up all 42 lights on 1 277v circuit.
LED driver correction
- Thread starter electricalist
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electricalist
Senior Member
- Location
- dallas tx
Sorry I left out that he told us it didn't matter what voltage is used on a LED driver the amperage is the same . we thought we would need more circuits than the plans called for. Today we hooked up all 42 2x4 lights to one 277 v circuit.
ptonsparky
Tom
- Occupation
- EC - retired
Talk about all your eggs in one basket.
I haven't read the other thread so I am no doubt missing something.
electricalist
Senior Member
- Location
- dallas tx
When I get home my son is climbing on me ans trying to take my phone and my post end up more confusing. Aorry
gadfly56
Senior Member
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- New Jersey
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- Professional Engineer, Fire & Life Safety
Enjoy the climbing while you can. I can hardly get my 9-year old to give me a hug sometimes. 'Cause, you know, he's a big boy now.
Fulthrotl
~Autocorrect is My Worst Enema.~
- Occupation
- E
so these are universal voltage drivers?
one single hot wire, not different ones for different voltages?
electricalist
Senior Member
- Location
- dallas tx
True
The actual amperage makes no sense.
When we hooked this one driver to 120v it pulled .35 amps that x 2 drivers per light is .7 so as mentioned the label on the fixture is in correct.
At best we figured we need 2 circuits but today we hooked them up to 277 and they all held.
Its my responsibility if I'm gonna do this type of work to learn and know the products.
With poor labelling, mis informed reps and constant hurry up schedule.
The highlight of my day is my son waking me up at 3 am. Daddy, Daddy, Daddy.....what! ,,he says,,,I needja help. Unlock door I wanna go play.
Electric-Light
Senior Member
It's not a surprise that real measurements read about 120 over 277th times the amperage. 
Although, it may not matter for nominal/list amp ratings. :shrugs:
Although, it may not matter for nominal/list amp ratings. :shrugs:
PetrosA
Senior Member
- Location
- Lancaster, Pennsylvania
I agree it doesn't make sense and someone must have goofed something up on the label. I haven't seen any of the LEDs that I use labelled with an ampere rating, rather they just give the watts. That number can't be used for sizing dimmers since evidently you have to multiply it by a factor of 10 or so or the dimmer will malfunction when turning on the load.
- Location
- Placerville, CA, USA
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- Retired PV System Designer
I think that a correct statement is that regardless of the supply voltage the current through the LEDs does not change.
With a buck circuit in the driver that does not imply the supply current staying the same.
With a buck circuit in the driver that does not imply the supply current staying the same.
electricalist
Senior Member
- Location
- dallas tx
This is one of the drivers. The other label was on the light.
Electric-Light
Senior Member
Not everything have the same nominal to real compliance.
A space heater may have real and actual amp that are very close together. A window AC may call for a dedicated 20A 120v circuit, because the nominal continuous amps are 12.5A if you were to use it in Death Valley. but measured amps may suggest 15A circuit is adequate even after the 25% allowance. This does not mean that you have the discretion to cut the plug off and wire it up for 15A circuit. These are things determined by specifying and factory engineers.
A space heater may have real and actual amp that are very close together. A window AC may call for a dedicated 20A 120v circuit, because the nominal continuous amps are 12.5A if you were to use it in Death Valley. but measured amps may suggest 15A circuit is adequate even after the 25% allowance. This does not mean that you have the discretion to cut the plug off and wire it up for 15A circuit. These are things determined by specifying and factory engineers.
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