freeradical
Member
yamaha_1fan said:You will need a DPDT not a single throw.
Remember, you are switching the ouput of the ballast, not the power to the ballast. Your cord to your lamps have two wires, maybe three with a ground? You need to switch both wires. Obviously the ground does not have to be switched.
SOMEONE JUMP IN AND CORRECT ME IF I AM WRONG
The two lamp commons can go to the same ballast common (relay common). But now after reading your post, I realized the extra functionality of a DPDT. You cannot use other devices on the same relay with an SPDT because you are flip flopping the ballast voltage and regulated current. With a DPDT, one pole will be dedicated to the ballast, and the other to 120v devices (or whatever your household voltage is). DPDT it is. Thanks yamaha.
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