Pool equipment transformer not bonded

M

mltech

Senior Member
Location
Ft. Lauderdale
Went to check on a condo pool equipment room as the chemical pumps (120v) were not functioning properly. After checking voltage and finding a back feed decided I better start unwiring some things and isolate the circuit. Found 2 conductors under ground that had burnt and were completely separated. They were conductive through the water in the conduit, enough to make a reading on my meter and also back feed on the next conductor. Pulled new circuits wired everything up turned it on and the pumps failed to work. Turned the circuit off and got whacked by the neutral?
Turns out the previous, so called electrician, failed to bond the XO terminal on the transformer. I’m really glad I found the real problem as i keep thinking this could have been a devastating event…
Now I want to rewire the whole room.
 
mltech said:
Went to check on a condo pool equipment room as the chemical pumps (120v) were not functioning properly. After checking voltage and finding a back feed decided I better start unwiring some things and isolate the circuit. Found 2 conductors under ground that had burnt and were completely separated. They were conductive through the water in the conduit, enough to make a reading on my meter and also back feed on the next conductor. Pulled new circuits wired everything up turned it on and the pumps failed to work. Turned the circuit off and got whacked by the neutral?
Turns out the previous, so called electrician, failed to bond the XO terminal on the transformer. I’m really glad I found the real problem as i keep thinking this could have been a devastating event…
Now I want to rewire the whole room.
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What is the transformer for, are you taking a larger voltage down to 120V?
 
Probably the transformer for the pool light to go from 120V to 12V.
Be sure the transformer is listed and labeled as for pool and spa use only. Intermatic best choice.
You should probably advise the owners to shut the pool down until the problem is resolved.
 
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