Pool bond question. Potential difference

E

electricblue

Senior Member
Location
Largo, Florida
Occupation
EC
Looking at a concrete pool that had a spa added. Pool builder says he chipped into existing pool shell to rebar in 4 spots to reach rebar and rebond then ran a ring around the pool and spa. There is a tingling when touching the pool water and spa water. .668 volts from spa to pool water. I say the old pool is not bonded and at a different potential from the new spa and fire bowls that all have continuity back to the pump. I just want to run this by someone here to double check myself before I have him start pulling up deck and looking into the bond.
 
How did you measure the voltage, and could it have been a DC measurement?

Is the voltage present with power off?

Are there different equipment terminals ( eg. pool and spa pumps) where you can take a resistance measurement?
 
I think you should wait for input from the more pool focused members ( @Mystic Pools comes to mind).

But I think you are correct about something not being bonded. It sounds like the contractor that did the spa did quite a bit of bonding, but clearly some bonding isn't present. Maybe the pool shell wasn't connected to the pool deck or some such.

-Jonathan
'
 
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