"battlelance" wrote in message
...
I have a two-lamp ballast, and I'd like to modify the wiring so I can
run either one, or two lamps. Right now, if I remove one of the lamps,
the other lamp shuts off.

From the looks of it, they would be wired in series. Do you think I
could wire it in parallel without having the ballast explode or burn
down my house?

TIA

If your goal is to control which lamp is on via a switch, it's going to
prove a lot more difficult that it looks at first. I looked into such a
design a little while back. The biggest problem with using a switch to turn
the bulbs on or off is that there is sometimes almost 600V between the
ballast and the bulbs (sometimes even more, upwards of 1300V, depending on
the ballast) Finding a switch or relay rated for that can prove expensive,
usually more than simply getting another ballast (ie: having two ballasts
for two bulbs).

Harry

P.S. Ballast are a lot more complicated than most people realize. As far
as I'm aware, I have never heard of a ballast that's designed for either
series or parallel connection, it's always one or the other.




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