Boyo

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boyo

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Cheboygan, Michigan. USA
Hi to all,
First time on here. Keep up the great work. I know you can help me. I now work in Mackinaw City Michigan as a part time electrical do everything. I fix (try to) everything.

My boss has 28 Hotels and almost all have had 12 volt poolside chair lifts put in. my question is: the guys are running the ground wire from the chair lift to the breaker panel ground. I don't agree with this as you may get a stray voltage come back on that ground wire.
I think they should be bonding to the pool ground and may be a ground rod near the chair lift, just in case the ground wire breaks as it is about 100 feet long on some pools. They like to run them where they dig for plants.
Chiar lifts are 12 volt DC battery that have to be recharged in a different room
 
They need to be connected to the pool equipotential grid, not to the EGC or to a local ground rod.
If you are not comfortable with identifying the equipotential grid, you should not risk wiring up a commercial pool.

You could probably add a local ground rod to supplement the equipotential grid, but if the 100' wire back to the grid breaks a local ground rod might actually be more dangerous than no connection at all.

The lift, IMHO, should not be connected to the EGC of the battery charger (if you are running AC to a charger at the lift.)

JMO, and you need more help than I can give you. And we need more information about the 12V lift.
 
If it is self powered from a battery and no premises wiring is brought to it at all, I agree with GD. It only needs a bond to the equipotential bonding system. All conductive objects in or in close proximity to the pool will be bonded to this if it was installed properly.

I also agree connecting it to a ground rod could do more harm then good in the right conditions.
 
Pool chair lift

Pool chair lift

The pool is an old one, maybe 1960 so I will check and see if the pool equipment is all bonded together before I fix the ground at the breaker box.
If it's not then I maybe back here for more help.
Thanks
 
boyo said:
The pool is an old one, maybe 1960 so I will check and see if the pool equipment is all bonded together before I fix the ground at the breaker box.
If it's not then I maybe back here for more help.
Thanks
Click to expand...
Keep coming back even if this question is settled! :)

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boyo said:
The pool is an old one, maybe 1960 so I will check and see if the pool equipment is all bonded together before I fix the ground at the breaker box.
If it's not then I maybe back here for more help.
Thanks
Click to expand...
I don't know what pool requirements were in 1960, possible there have been changes since then. But at same time you may have had some maintenance done over the years and things were done to current code if something was disturbed.

Most equipotential bonding related items (bonding jumpers and terminations in particular) are probably encased in concrete and is not obvious if they are there or not.
 
I don't see the difference. The equipotential bonding is connected back to the panel so if they use a #8 bonding on the chairs it should not make a difference. NO?
 
Dennis Alwon said:
I don't see the difference. The equipotential bonding is connected back to the panel so if they use a #8 bonding on the chairs it should not make a difference. NO?
Click to expand...
If there is proper equipotential bonding in the existing setup, then everything is at same potential anyway. If there is no equipotential bonding present you are bringing whatever potential ground bus at that panel is out to one point that may or may not be different potential then what is around it, creating a voltage gradient around that one object.
 
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