840w LED lights 15 amp or 20 amp breaker?

L

Lilmink

Well-Known Member
I am running four 840w grow lights , will need to install new breakers. Should I put each on a separate breaker? Should I use 15a or 20a?
 
Lilmink said:
I am running four 840w grow lights , will need to install new breakers. Should I put each on a separate breaker? Should I use 15a or 20a?
Click to expand...

Youd need a 30, or 2 20’s is my guess without knowing the amp draw on your lights. I run 650w lights and they are 6,3A each
 
bk78 said:
Youd need a 30, or 2 20’s is my guess without knowing the amp draw on your lights. I run 650w lights and they are 6,3A each
Click to expand...

I have a 30 amp dual breaker that isn't being used anywhere. I just wasn't sure if I can put the lights on a 30 amp.
 
Also know once a breaker trips once from a true overload it never operates at full capacity again. Its only good for about 80% of its rating. It's simply how a breaker works and is designed internally
 
Assuming that your voltage is steady at 120v AC input, you'll be drawing 7 amps per fixture. Personally I'd put 20 amp breakers and run two lamps per circuit.
 
Lilmink said:
I have a 30 amp dual breaker that isn't being used anywhere. I just wasn't sure if I can put the lights on a 30 amp.
Click to expand...

Once again wattage means nothing. The 30 dual should be fine to run the 4 from. You need to kniw the amp draw from your lights for proper calculation.
 
bk78 said:
Once again wattage means nothing. The 30 dual should be fine to run the 4 from. You need to kniw the amp draw from your lights for proper calculation.
Click to expand...
He's right it will be fine. But if you are stupid and put 30 amps or more thru those wall wires your asking for trouble if they aren't guaged low enough
 
Well that's assuming he is going to wire. I'm trying to stress that he does and be safe. Not use existing wall wires and put that many amps guessing
 
You must log in or register to reply here.
Back
Top