Are the yellow wires on 2x20 trigger start ballasts isolated from the mains? « on: November 02, 2018, 08:41:43 PM » Author: Fluorescent05
I want to power 2 F20T12 lamps on a single lamp magnetic F40T12 RS ballast. Would the yellow wires of a 2x20 TS ballast work as a cathode heating source (without making anything go boom)?
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	Re: Are the yellow wires on 2x20 trigger start ballasts isolated from the mains? « Reply #1 on: November 02, 2018, 09:08:37 PM » Author: funkybulb
with F40 rapid  start ballast for 1 lamp you can power both lamps using to two FS2 starter and wire them in preheat circuit  and use one lead on both end of ballast  leaving one of red and blue wire off   cause your preheating both lamps in series
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	Re: Are the yellow wires on 2x20 trigger start ballasts isolated from the mains? « Reply #2 on: November 02, 2018, 09:35:53 PM » Author: Fluorescent05
But is the yellow wire cathode heating on 2x20 ballasts isolated from the input power?
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	Re: Are the yellow wires on 2x20 trigger start ballasts isolated from the mains? « Reply #3 on: November 03, 2018, 12:49:10 PM » Author: xmaslightguy
Why not just use the 2xF20 ballast as intended? If you want to use a 1xF40 ballast to run a pair of F20's (and keep it RS) your best bet would be to use a separate transformer for the yellows
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