ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (gfretwell), 32 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#84794 05/06/03 10:05 PM
Joined: May 2003
Posts: 17
D
DJF Offline OP
Member
This has probably been asked before, but I need a definitive answer:
Per 1999 NEC (and 2002) am I allowed to use NMC in a Single Family building to feed a Pool Motor or a Hot Tub that is located outside the building. The NMC will run to an interior Junction Box where the wiring method will transition into RNC (PVC)-and-THHN to the exterior.
For clarification: the Pool Motor has a Single Pole Switch as the Disconnecting (plus GFCI protection and a Twist-Lock Cord & Plug), and the Disconnecting Means for the Hot Tub will be a 50-Amp GFCI Breaker in a Rain-Tight Enclosure.

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

#84795 05/07/03 06:28 AM
Joined: Oct 2000
Posts: 5,392
S
Member
from the hip..i believe the code crux will be the 'insulated' grounding conductor here.

[This message has been edited by sparky (edited 05-07-2003).]

#84796 05/07/03 10:55 AM
Joined: Oct 2000
Posts: 4,116
Likes: 4
Member
see 680.21(4) and 680.42 (in 2002 NEC)
Be aware that local codes may differ.

[This message has been edited by Bill Addiss (edited 05-07-2003).]


Bill
#84797 05/07/03 02:25 PM
Joined: Jan 2002
Posts: 163
D
Member
(1999) 680-25(c) - Methods of Grounding Motors

3rd paragraph - "in the interior of a one-family dwelling...any of the wiring methods recognized in Chap. 3 that contain a copper EGC that is insulated or covered by the outer sheath [read NM]...shall be permitted"

2002 says the same [simpler language].

#84798 05/07/03 07:35 PM
Joined: May 2003
Posts: 17
D
DJF Offline OP
Member
Thanks for answers so far BUT: I believe the intent of the NEC is to allow NMC in the Interior of a Single Family Building but why is it in the Pool Motor section and not for ALL Pool associated equipment? Or does it mean for MOTORS that are in the interior since it is only in the Motor Section?? And SOARS says “Note that this wiring method does not apply to the supply of spas and hot tubs that are located outdoors.” And the IAEI 1-&-2 Family book says: “….does not apply to branch circuits for spas and hot tubs. The electrical equipment that service spas and hot tubs commonly includes panelboards, control panels, motors and heaters.”
Just some thoughts I get aimed at me. Any help will be appreciated.

#84799 05/07/03 07:48 PM
Joined: Jan 2002
Posts: 1,457
E
Member
Answer to first question, yes.

#84800 05/07/03 08:29 PM
Joined: Feb 2002
Posts: 2,233
H
Member
Bill,

I agree with you that if a MOTOR was wired, then NMC wire inside of a house would be OK as per, 680-25(c). However if there is a pool light or a sub panel, then 680-24(4)b) and 680-24(d) would not allow it. Then the pipe would have to be run inside of the house.

#84801 05/07/03 08:48 PM
Joined: Oct 2000
Posts: 4,116
Likes: 4
Member
Harold,

I can't look at your sections right now because my '99 is among the missing, But I agree with your comments. Since the question was specifically on Motors I did not delve into other things.

Is there still a restriction on installing wiring for Underwater Fixtures from some types of sub-panels? can't seem to spot it in the 2002 NEC.

In 680.23(F)(2) it requires an "insulated copper equipment grounding conductor installed with the circuit conductors".... and "without joint or splice" ... I don't see any mention of existing sub-panels, or other reference to the source of the circuit.

Bill

[This message has been edited by Bill Addiss (edited 05-07-2003).]


Bill
#84802 05/07/03 09:07 PM
Joined: Apr 2002
Posts: 558
C
Member
Bill

How about 680.25(A)

Curt


Curt Swartz
#84803 05/07/03 09:51 PM
Joined: Oct 2000
Posts: 4,116
Likes: 4
Member
Curt,

Ah, that's what I was looking for, thanks.

Now, how do we define "Existing" ?

[Linked Image]
Bill


Bill
Page 1 of 2 1 2

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5