Re: SM Climma AC - Calpeda Pump Voltage with Breakers Off
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I am on BeBe at Red Frog Marina in Panama wit 60Hz shore power. I just checked, with all the AC breakers off but the main GFI on, and I have: 1) 120v from blue to yellow/green, as well as from brown to the yellow/green. 2) I show 0 volts AC accross the blue to brown contacts (I don't understand how you could measure 240 v across the Blue to brown when the motor is not running?). 3) when I turn of the main GFI breaker there is no voltage. I did not test the generator.
That is a shocking discovery! It would be very interesting to get confirmation of the voltages from a boat on 50 Hz supply.
One thought: Could the stray voltage be coming back from the capacitor. It shows 0 across the Blue to brow because the voltage on the blue and brown are on the same cycle when there is only one 120v source? To test this I disconnected the blue and brown wires and measured the voltage of these independently: Blue wire to yellow/green was 120v, Brown wire to yellow/green showed 39v (Stray voltage?). The voltage across the Blue to Brown was 120v.
I'm surprised this has not come up before, as it creates a very unsafe condition for one assuming the circuit is de-energized. My conclusion is to disconnect at the pedistal when working on the AC circuits to be safe.
Daniel Carlson on sv BeBe, SM#387
On Fri, Apr 19, 2019, 9:37 PM Gary Silver via Groups.Io <email@example.com wrote: