bulit a 16x10ft room split almost in half in my garage. running 4 cfl duel lights, with two fans in the veg room. finishing up the flowering room want to run two 650w 240v ballasts hps in the flower room with 2 fans and a ac unit. think the garage is on a 20amp circuit. will it blow. what do you guys think i should do

Yes it will with just one 20 amp circuit.The light are 240 vac will take 10 or more amps.That's with the new digtal ballest.You have fans,timers,the ac will eat the most of the amps and you have to have alittle load amps to boot.Talk to a electrician and see if you can get a new line installed in the garage. Peace

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Check and see if you have more then one fuse for the garage. My garage has 2 15 amp fuses. My 600w HPS uses less amps @ 240v then it does @ 120v. Check all your equipment to see how many amps your running total. You may be runing less then you think. Im pretty sure you dont want to run more then 17-18 amps max with a 20 amp fuse. If not you could run the fans and the cfls off another line from the house and run the lights on the 20 amp. Good luck!

To be safe you shouldn't load the circuit more than 80% of capacity.

With a 20 amp curcuit that would equate to 16 amps.

2 - 240v -600 w ballasts will use roughly 6 of those amps.

The fans will use a few amps. The amp draw of the A/C will be the real kicker (literally). Check out how many amps the AC is to get an idea where you are at.

be safe...first and foremost!!

ww

If your 20 amp breaker is 110v as I think it would be. I would run a separate 240v line to run your 240v equipment. Twin 20 amp should be plenty.

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Just make sure you match your wire with you breaker.

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Just the other way around, you want to protect the wire so for a 12 gauge wire you want a 20 amp breaker. In some instances you can use a 25 amp breaker to protect 12 gauge.
14AWG = 15 amps
10AWG =30 amps
you guys are doing great

very very good if you use a low gauge wire with a high rated circut like 14awg in a 30 amp circut or 20 amp circut you just might burn down what you have. each thing you are running should have a UL sticker on it with the rating of each appliance that should either give you the amp draw or the wattage draw any more question just ask peace
haze

thanks to all, just going to run another 20 amp circuit just to be on the safe side. thanks again