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#93315 05/14/05 10:43 AM
Joined: Feb 2002
Posts: 2,233
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I saw a hydro massage bathtub on a rough inspection the other day. The motor was all plastic, no metal on it, even the mounting plate was plastic and it had a 3 prong plug. There was no place for a bonding wire, but it didn't say double insulated. Does this need to be bonded? I told the GC that for the final inspection, I want the EC to be there and with the book to check the Manufactures requirements.

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#93316 05/14/05 02:37 PM
Joined: Jul 2004
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Manufacturer's instructions? It does sound like a double insulated pump but I really like to see that written somewhere.


Greg Fretwell
#93317 05/15/05 05:31 AM
Joined: Jun 2004
Posts: 613
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Sounds like a double insulated motor with a means to ground nonaccessible internal non-current-carrying metal parts.

Bonding with #8 would not be required.

shortcircuit

#93318 05/15/05 12:33 PM
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Greg,

Yeah it sure sounds like and looks like a double insulated motor. However I will want to see the instructions on the final inspection to be sure.

#93319 05/17/05 06:46 AM
Joined: Aug 2001
Posts: 329
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I just put one in last week. There was a lug on the motor but other than that it was all plastic and self contained; however, a hydromassage tub differs from a self contained hot tub/spa in that the water fill is from a spigot and faucet set not from within the fiberglass tub itself. My local AHJ wanted a bond to the metal parts of the spigot/faucet set. I'm not sure I agree with him technically, but his theory (NEC required or not) was sound so I didn't argue ... besides the #8 solid cost me a whole $3.54 (including tax and the clamp) and took 15 min to install.

#93320 05/17/05 07:59 PM
Joined: Apr 2002
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Harold:
I had the same item today on a rough. There is NO lug on the motor assembly. The HO had the mfg paperwork (three languages), and I looked thru it briefly; NO mention of bonding at all.

This is a "HO" job; no EC, a brave guy doing a big add-a-level & addition. He was/is going to call the mfg help line to get some info on the motor assembly and supply me a copy. Told him the metal piping required bonding, and to call me when he has the info.

All-in-all, for a DIY HO job, it wasn't bad. Guy wired outlets/lights in 12 ga; 10 ga to the jacuzzi....8 to the hvac.

I'll let you know when he gets me the info.

John


John
#93321 05/17/05 08:15 PM
Joined: Feb 2003
Posts: 939
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even thru i did install few new spa tubs which it have double insluated motor[s] but have to bonded any metal enclosure including the heater i ran plenty #8 wire there and leave extra near the motor in case it have to be replaced in future which it will happend anyway

Merci, Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

#93322 05/23/05 09:00 PM
Joined: Feb 2002
Posts: 2,233
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John,

Have you come across the houses with the plastic water pipes yet?The Hot is red and the cold is blue colored PVC pipe. Then what do you have to bond to for a hydro tub? LOL

#93323 05/23/05 10:25 PM
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There is no such thing as metal pipe in Florida it seems. Bonding is moot if the tub plastic and the motor is double insulated.


Greg Fretwell
#93324 05/24/05 10:20 PM
Joined: Apr 2002
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Harold:
Yes, had the red & blue, the HT was NOT double insulated, so the motor lug went to the H&C 'tails' going to the faucet assembly, it is metalic piping. I thought about the "4 sq inch or larger", but no one presented any arguments.

If it ain't there, ya can't bond it. right??

John


John
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