ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by HotLine1. 01/22/18 07:31 PM
Photocell
by twh. 01/22/18 05:06 PM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 6 guests, and 6 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Hydromassage tub question #14508
09/23/02 05:51 PM
09/23/02 05:51 PM
E
Electricmanscott  Offline OP
Member
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
I am wiring up a hydromassage tub that has a double insulated motor with no means for bonding. According to the NEC this need not be bonded. If there are no metallic parts other than the water lines I assume I am done as there is nothing else to bond. What do you guys think?

Work Gear for Electricians and the Trades
Re: Hydromassage tub question #14509
09/23/02 05:53 PM
09/23/02 05:53 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,344
i think the tub makers are smartening up...

Re: Hydromassage tub question #14510
09/23/02 08:47 PM
09/23/02 08:47 PM
H
harold endean  Offline
Member
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
If the motor is double insulated then nothing has to be bonded to the motor. However some new tubs have a heater. Now these heaters need to be bonded.

Re: Hydromassage tub question #14511
09/24/02 02:03 AM
09/24/02 02:03 AM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Just as long as the whole thing is protected with a GFCI, I don't think that you can go wrong.

Re: Hydromassage tub question #14512
09/24/02 02:13 PM
09/24/02 02:13 PM
S
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
If the copper water pipes are reachable, and in the accesible area, I would think a good idea would be to bond the water pipes to the equipment ground. Is that a good idea? I had an inspector a while ago, ask for that to be done. I guess he was treating it like a pool with anything metallic within 5 feet of the tub had to be bonded.
Have a good day

Re: Hydromassage tub question #14513
10/12/02 10:10 PM
10/12/02 10:10 PM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Welcome to ECN, SJT.
Scott, sorry about my earlier advice about the GFCI on this Double Insulated equipment.
Over in NZ here, we have a number of brands of these Spa/Hydro-massage units and they are becoming more and more popular with motels and ski resorts.
I specialise in the installation, testing and commissioning of these pools.
Have any questions?, ask away.

Re: Hydromassage tub question #14514
10/16/02 05:53 AM
10/16/02 05:53 AM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,344
Trumpy;
how do you wire them in NZ?
does the same general philosophy apply?

are GFI's ( or your equivalent) used?

is a disco within sight?

do you 'bond' all mettallic's?

are proximal lighting fixtures & receptacles restricted?

just curious....

Re: Hydromassage tub question #14515
10/19/02 10:22 PM
10/19/02 10:22 PM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
Sparky,
The same very general principles still apply to installing and wiring a spa pool.
Over here, the feed from the supplying switchboard, must be from a dedicated Residual Current Device(RCD), this is the same as a GFCI, although I am not sure of the trip current, that you guys use over in the US, we use 30mA, for personal protection.
The problem of Bonding all of the metallic pipework has been alleviated, by the use of Polyethylene Pressure pipe,but all metallic enclosures(controls housings,etc),must be bonded by at least a 4mm2 wire.
All light fittings that are installed in a
pool area are OK, as long as no person can touch them while being immersed in the pool,or are standing around the edge of the pool.
For any light fittings,actually in the pool, over here, they must comply with IP68 of IEC 527,this is the code for ingress-protection(dust and water).
What does the US use for the same type of code?, with respect to weather and water-proofing?.
[Linked Image]

Re: Hydromassage tub question #14516
10/24/02 06:15 AM
10/24/02 06:15 AM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,344
Trumpy,
Our immersed lighting has it's own fairly stringent requirements in the NEC art 680., Either 'dry nitch' or 'wet nitch' would specifically apply.

Our weather/water proofing would be dictated by the definition of dry/damp/wet area's throughout the NEC, with the appropriate materials required per listing/rating.

bodily immersion vs. associated electrically protective devices such as our GFI ( 4-6 ma) works a little funky here.

there are many situations where one can, by code, get away with normal ( non-GFI) protection. One such instance is a hard-wired pool, 3Ph motors,or pool heaters.

This i make no claim to rationalize.... others may imbellish... [Linked Image]


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Joe Tedesco
Joe Tedesco
Boston, Massachusetts USA
Posts: 2,749
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 15
Potseal 15
Popular Topics(Views)
243,599 Are you busy
180,405 Re: Forum
170,869 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 14 (0.004s) Memory: 1.0009 MB (Peak: 1.1687 MB) Zlib enabled. Server Time: 2018-01-23 12:04:23 UTC