I'll see if I can take some pics or draw up an image to detail things for you. Ok, so you have a dedicated outlet, the next thing we will need to know is the type of line that is run to this outlet. It will most likely be a "12/2 w G" or "14/2 w G" (gauge of wire, amount of insulated wires, plus a ground wire.) We need to know the gauge wire so you can get the correct breaker for your box. Oh yea, open the breaker box, you may need to remove the front cover as well. Find the breaker that is going to the outlet you want to switch over to 220v. Check to see if there is enough room to fit in a double pole breaker (breaker with two switches connected together). You will be removing the current breaker and adding the new double pole breaker, if room is tight they sell half height breakers that fit in the space of a single breaker. If there is room in there for the new breaker but you need to located in another spot of the box make sure the wires will reach the new location. (when the box was first setup they tend to cut things close so sometimes it's hard to rearrange things.) If all checks out then the rest is almost done. The wire will have the markings on them telling you what wire you are using and what breaker to get. 10 gauge=30amp, 12gauge=20amp, 14gauge=15amp--- breaker
right now your breaker is setup so that the black wire is connected to the breaker and the white wire and ground wire are connected to the neutral bus. When you replace this breaker with the double pole breaker you connect the white and black wire to the breaker and only the ground wire to the neutral/ground bus/bar. It doesn't matter which side of the breaker the black and white wires are connected to. I did this with the power live last week although I wouldn't recommend it to someone else to do. So make sure you turn the main breaker off if you can which will kill power to your whole box except the main power (Big power lines)coming to this main breaker (usually the upper most breaker). It's pretty straight forward. Hopefully I didn't confuse things to much. Like I said earlier I'll try to get some pics or diagram drawn up to make things a bit clearer. Ask if you don't understand or have any questions.
Thanks, appreciate it, but I'm still kinda leery - actually just put the breaker box cover back on - had taken it off and was looking at it and imagining what my body would smell like with all those amps running through it.
Anyways, after getting back from Home Depot and seeing/remembering how big and heavy 8x4 pieces of plywood are, I've got a new game plan.
Have 60 amps in there (3 dedicated 20 amp circuits), and I was trying to build a "structure" because I wanted to get away with running 1 AC (14000BTUs) for the entire garage, but I'm starting to think that I don't have to.
Thinking I could have the 8x8 DarkRoom tent with two 1Ks in there and an AC, and that would be a totally sealed environment.
Would also move my vegging trays/lights/etc. into my 4x4 tent, which would make enough room for me to put a smaller portable in there - thinking like 8000 BTUs should do it? Anyone know? I'm no AC expert, and the ambient temps could get up to 110ish on uber hot days, but I think 8000BTUs should be sufficient for a 400HPS and some fluoros.
So now it comes down to handling that energy load - the 14000BTU AC pulls 1200 watts, so that could share a circuit with the 400HPS (and still be under the 80% safety threshold).
Circuit #2 would be a 1K and the smaller AC, which is ~800 watts - again, right at the 75% safety zone.
Circuit #3 would be the other 1K, pumps, fluoros, etc - wouldn't need a dehumidifier anymore because of the two ACs.
That scenario would just force me to enrich the veg tent with CO2 (because it'd be fully sealed), which ain't that big of a deal - just buy another regulator and a timer.
The only thing (well, one of the things) that sucks about not being able to cool the entire garage is that air-cooling the lights is now impossible - makes no sense to pull in 100F air from the outside to cool them.
Of course, it'll sure make setup easy without having to worry about installing any ducting
So, I have three questions:
1) Does anyone see any issues with the circuits being loaded the way I foresee? Of course a 240V circuit would solve all of my problems, but I'm quite leery about that - that being said, if the answer to my next question is "no", I guess I'm just gonna have to bite the bullet.
2) Does anyone know anything about running sealed rooms and the size of AC required for that? I figure a 14000BTU should take care of an 8x8 (it's recommended for 400-525 square feet) room with 2 1Ks in it, even if it's 110 outside of the tent. Can the same be said for an 8000BTU in a 4x4 tent with a 400HPS and some fluoros?
3) When the electrician gave me those two circuits, he said that only one of them was GFCI or some such shit (something to do with grounding) - anyone know if this is an issue or not, and if it is, what it means?
Sorry for the long-windedness.
EDIT: of course, could go to 4 600s instead, which would mean:
Circuit 1 - 14000BTU AC and 1 600HPS
Circuit 2 - 3 600HPS
Circuit 3 - 1000BTU AC (pulling say 1000 watts), pumps, timers, fans, etc.
This way would cost mucho mas dinero - as opposed to buying one more 1K and a Magnum (for $500, all-in), it'd be about $1500+.