whathits14
Active Member
NEVER rate devices by amperage... always wattage. ALWAYS. amperage has nothing to do with the amount of power being used.
since your used to using amperage ill do the math and convert the numbers over
a single 600 w lamp and ballast will use approximately 5.41 amps of current.. so you have 2 of them.. which is 10.82 amps.
10.82 amps = 1298 watts... a 15amp breaker will want to trip at 1440w.
so thats one breaker.
the 1000w lamp and ballst will pull 8.83 amps.. and the 400w will pull so 3.58 amps. thats another 15 amp breaker.
using that we can say tht your total load for the grow op, (plus an addditional 150w for fans and timers and pumps and stuff) will be: 2938 watts
2938 watts @ 120vac= 24.48 amps
2938 watts @ 240vac= 12.24 amps
the ideal solution would be to have 240v ballasts, so that the larger portion of the load could easily be run off of one 15amp breaker, and then have one 15 or 20amp 120v circuit for normal plugs so you can plug in the pumps/timers etc etc.
now back to the subpanel.. like i said before, it has to go. no ifs ands or buts about it. you said your running a stove, and a washer/dryer on it. i will assume that if your using the stove, and doing some laundry, and the lights are all on you will be using-
68.40 amps or 16,418 w (16kw/h) the closest size electrical panel that will fit is a 100amp panel. they dont make a 75amp panel, and a 60amp is nowhere near big enough.
so you can see how you would be pulling almost 70amps to that subpanel, which means the wire that feeds it must also be good for 70amps.. which will be #4 awg copper. i seriously doubt that there is #4 wire feeding that subpanel right now. maybe #8 (which is twice as small)at best...
your main panel is a 125 amp intermittant duty panel that can be rated for 100amps of continous duty... this means your main breaker will want to trip at 100amps. this means that if your using close to 70amps to run the subpanel, you only have 30 amps to run the rest of the house! so as soon as the water heater turns on bam! main breaker just kicked. so the main service must be upgraded to accomodate the load of the lights you want to add.. its a real bitch but its going to have to happen if you plan on living in the house at the same time.
Again, awesome for the info. We do have switchable ballasts, so we would be running 240 on the lights. The stove/oven is gas, but IDK if it needs electric too? We will upgrade the shit out of that box b4 we try to run anything. Thanks again man.