December 1, 2010 5:45:19 PM PST
ok, this isn't that bad, but the costs do start to jump.
I usually figure 2k watts (either two 1k or three 600's) will roughly cover a patient worth of bloom. More is obviously better, but this is a good start. so that is about 9 amps draw at 240 volt, or 18 amps draw at 110 volt.
now you need an AC if you get bigger than that, you can try to do it without, but it helps so much with humidity and heat issues. that runs on about 10 amps alone at 240, or 20 amps at 110.
so if you could dedicate 60 amps at 240v for your lights, you could put 10000 watts out easily, but you would not want to go much higher. You never want to load a breaker past 80% load, and 75 is really the better way to go. The are not meant to run continuously at max power draw. So the 60 amps at 240 could technically support 14400 watts of power draw, safe point is at 11000 or so continuous. add another 2 circuits at 15 amps 120V to run ALL the fans, vent fans, air scrubbers, etc, that go with the grow, and ad a dedicated line for the AC at 15 amps 240V.
Total amperage is roughly 90, split to
60A 240V Lights
15A 240V Air Conditioner
15A 120V Duct fans, fans, dehumidifier
15A 120V Duct fans, fans, etc
I plan a 200 Amp drop to a workshop if I ever build a 4 patient system, so I can add lighting of a vertical variety, if I ever needed it. never want to little, always want too much, is safer, and won't blow the circuits nearly as often.
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