It's probably either 120 or 240 v but either way you could definitely light it up.

Not likely, I'd guess either 277 or 480.

It might be 480 volts because I plugged it in and the lamp didn't light at all and the ballast didn't even buzz.

I would at best guess 480 becuase there are 4 coils and 4X 120 is 480. Not sure if that's a reliable way to tell though... 240V seems to be pretty common for mercs though... How do you know the wattage? This may be 700 watts instead of 1000 and then you can never really light it anyways unless you spend a fourtune on a 700w lamp.

But doesn't your M-400 have 4 coils too?

I think this is wired in a series circuit, can you guys show me or tell me how to wire this in parallel? I Bet that will make this fixture work, it looks 120 volts, it might BE 120 volts since it was in a parking lot of an auto dealership, they might of kept everything 120 volts since the building itself was 120 volts and they probably kept everything wired the same.

Well here's the wiring diagram that Mike's M400 came with. I wonder if if works for the M-1000 ballast...

I have the same ballast, mine is 240 volts but it worked on a household current.

Thanks Joe, I wired it like in the diagram and now the ballast actually BUZZES. But the lamp is having some trouble igniting. It doesn't seem to light at all. I wish I had a meter...

Do you think its just a brand new MH lamp having some trouble starting up on the MV ballast? Cause the lamp IS brand new and the OCV is lower than it is on a metal halide lamp so I think the metal halide lamp is having some trouble igniting because of that.

It could also be that you are trying to light a 1000w MH lamp on a 700 watt ballast unless you're sure the ballast is 1000 watts. @ Joe; I forgot it has four coils LOL. If you don't mind risking a spare lamp, try another lamp that's a lower wattage than 1000 to see if it ignites.

Jace told me to use a 400 watt MV lamp and I used that and yes it does light, but it gets to a certain brightness (a bit below 100 watt MV brightness..) and then it stops brightening up. Jace thinks it might be a problem with the wiring or something.

Hmm. Could it be a bad cap?

Or this isn't a 120 volt ballast, that is the only other reason I can think of.

If this isn't 120V, wouldn't it trip the breaker or not work at all?

It won't work, but it won't trip the breaker either.

I don't know, I'm sure it won't trip a breaker, when I connected my 600 volt MH ballast to 120 volt nothing happened, at all.

I spotted some text under the ballast, not sure what it means though It says "429E2" on the plastic. It says it twice and the E is smaller.

What does it mean? Will it help me figure out the specs of the ballast?

I think that's just a part code.

I still want to know how to wire this. I wired it like in the diagram and like I said the lamp doesn't brighten up all the way it only goes to a bit below 100 watt MV and stops brightening up. (400 watt MV lamp) What do you think is wrong?

It's sounding like a bad Cap, I don't think the lamp would Ignite of it was being underpowerd.