Dom,

I installed a pool motor timer (Intermatic P1103FE), the motor is 220 but the timer is 110. I ran a common/neutral from a 110 GFI outlet to the the timer as the 220 line does not have a neutral believing that all the neutrals are at the same potential at the CB box. Turned on the power and the GFI popped. I turned off the 110 PWR to inspect my work and was surprised by the shock I got from the leg of the 220 that was coming in on the neutral line. That was fun. I bypassed the timer and all is fine.  What the heck is going on???

Thanks

John

http://www.intermatic.com/en/products/pool_and_spa/electronic_controls/electronic_time_switches/p1000_series/p1103fe