dilema, I have a 208v ballast and 220v Circuit

Old 07-18-02, 09:44 AM
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Question dilema, I have a 208v ballast and 220v Circuit

I have just bought a set of hid lights that were supposed to require 220v. These lights actually require 208v only. My home was built in the early 50's and has the original 2 wire electrical wireing and time delay fuses. I do have two 220v (or what I assume to be) circuits (one in the main pannel, and one in a subpannel) My question is can this be wired to one of these circuits and how.
I have the wireing diagram (I'm not an electrician mind you) I'll attach it.

Thanks for any help you provide,
Old 07-18-02, 09:50 AM
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Ok. So I can't post the image of the scematic. But I'll attach a link...

Old 07-18-02, 09:52 AM
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If you hook those 208v ballasts up to the 220v lines that you have they will work for only a short while and then burn the insulation on the windings of the ballast.
You can purchase replacement ballasts for those HID fixtures. These are usually multi-tap ballasts capable of 120, 208, 240, and 277 volts.
If you connect them to higher than rated voltage you will damage the starter if they are sodium lamps and if they are mercury vapor or metal halide you will damage their capacitors.

You can also purchase a transformer that will step your 220 down to 208 volts but, I suspect replacing the ballasts will be cheaper and will definitely be easier.

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