Hot tub 50a GFCI trips

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  #1  
Old 03-27-12, 01:56 PM
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Hot tub 50a GFCI trips

6 year old hot tub that worked fine.
Problem: 50a gfci triped when pump motor went into high mode.
Tried: bypassed heater: Motor tripped when called for hig mode.
Tried: removed heater and pulled pump motor and had motor benched checked,
tested fine.
Tried removed leads from hot tub to gfci breaker, now the gfci breaker will not
at all. Power from the main panel box to sub panel is OK.
I guessing bad gfci breaker, any other suggestions?

Thanks
 
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  #2  
Old 03-27-12, 02:38 PM
Nashkat1's Avatar
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What is the information on the motor nameplate?
 
  #3  
Old 03-27-12, 03:02 PM
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Hot tub 50a GFCI trips

Motor info

Emerson R63MWENA-4727 rpm 3450/1725 230 volts amps 12.0/4.4
 
  #4  
Old 03-27-12, 04:35 PM
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A 50A supply should be able to handle that. Suspect not wiring per specs or a nick in wire insulation somewhere. GFCIs and intermittent (motor) loads can be tricky but this is what the install calls for (I'm assuming) and it should work.
 
  #5  
Old 03-27-12, 06:40 PM
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You said you benched the motor ind it tests fine. How did you test it? Sure it will spin but what your looking for is if the motor is leaking current to ground. That is what a GFCI does. It detects leakage from 4-6mA.

If you did have it checked by a shop, An they did test it for leakage, I would suspect the GFCI breaker then.
 
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