I am assuming you read my 2nd POST, we both posted at the same time!

You dont think so, its a 20 AMP.. I assume you can run a 1000Watt HPS on one circuit. I am doing 400 Watts of HPS + 400 Watts of Flourescents + some fans (dont know wattage yet)

So lets add it up

4.0 (I took this off the ballast) + 3.3 for flourescents (400/120=3.3) = 7.3 Amps

I dont think 2 fans is gonna pull too much AMP but I will check when I buy them.. That will leave me with around 12.70.. For good measure, lets reduce it by 20% for safety purpose that leaves me around 10.16 (12.70 * .8). Now keep in mind I dont claim to be a electrical expert.. so my math and calculations could be wrong.. This is just what I was thinking.. If I am wrong.. Please tell me, I dont want to burn down the house
SeedKing72 Reviewed by SeedKing72 on . Electricity, Current, Overloade circuit I have a S51 400 Watt ballast. It says it current is 4.0. So this telling me that the ballast is 480Watts/120Volts=4.0 AMP Current. I needed an extentions cord that was rated at 15AMP and is 12 Gauge Now I also have 5 2-40 Watt Flourescent fixtures in there for a total of 400 Watts.. So I am assuming that is a current of 400Watts/120volts/3.3 AMP (Am I doing this math right). The fixture has nothing on it to tell me the current. So I am now at what 4.0 + 3.3 = 7.3 and the circuit it is Rating: 5