ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Fuse blower plug?
by SPSchuman. 07/20/19 05:02 PM
Baseboard Mounted Light Bulb Socket
by SPSchuman. 07/15/19 03:22 PM
Hunter Fan Recalls Brunswick 3 & 4 Light Fans
by Admin. 07/11/19 11:08 AM
Honeywell Recalls some Smoke Sensors
by Admin. 07/11/19 11:03 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 37 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
50 amp hot tub #94070
07/05/05 11:33 PM
07/05/05 11:33 PM
watersparkfalls  Offline OP
Member
Joined: Mar 2005
Posts: 233
Washington...Not DC
can you use nm 8-3 to feed a 50 amp hot tub?

2017 / 2014 NEC & Related Books and Study Guides
Re: 50 amp hot tub #94071
07/06/05 12:21 AM
07/06/05 12:21 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,373
Estero,Fl,usa
I think not. NM is not one of the approved wiring methods in 680 part II. I also could have problems with the ampacity, based on the nameplate rating of the spa and mfg instructions. 8ga is only good for 40a in the 60c column.


Greg Fretwell
Re: 50 amp hot tub #94072
07/06/05 07:16 AM
07/06/05 07:16 AM
G
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,498
Michigan USA
Greg- The question is not stating whether it is an indoor or outdoor spa. 680.42 and 680.43 come into play here.


George Little
Re: 50 amp hot tub #94073
07/06/05 09:30 AM
07/06/05 09:30 AM
watersparkfalls  Offline OP
Member
Joined: Mar 2005
Posts: 233
Washington...Not DC
it is an outdoor hot tub

Re: 50 amp hot tub #94074
07/06/05 04:44 PM
07/06/05 04:44 PM
E
Electricmanscott  Offline
Member
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
Are you asking if you can run NM outside to a hot tub?

Re: 50 amp hot tub #94075
07/06/05 05:59 PM
07/06/05 05:59 PM
S
shortcircuit  Offline
Member
Joined: Jun 2004
Posts: 610
massachusetts
Romex (type NM) is allowed in the interior of a one family dwelling or the interior of a structure associated with a one family dwelling...

But read the instructions with the tub and labels at the control box behind the skirt of the tub. Some require a full size EGC to be run with the circuit conductors...

shortcircuit

Re: 50 amp hot tub #94076
07/06/05 06:25 PM
07/06/05 06:25 PM
B
boggerbutt2454  Offline
Member
Joined: Feb 2005
Posts: 44
Concord NC USA
Shorties right read your Manufacture's manual most spa manufacture's will put min. wire size and I've found more times tahn not it is a #6 copper, but check your manual. If customer doesn' know call dealer they bought it from.

Re: 50 amp hot tub #94077
07/06/05 06:38 PM
07/06/05 06:38 PM
Happy Birthday iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
If NM is in fact appropriate 8 AWG NM can not be used above 40 amps.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: 50 amp hot tub #94078
07/07/05 02:22 AM
07/07/05 02:22 AM
watersparkfalls  Offline OP
Member
Joined: Mar 2005
Posts: 233
Washington...Not DC
no i am not asking if i can run the nm outside. just wondering if i can calculate hot tub as a motor to use smaller wire.

any thoughts against using 6-3 aluminum?

Re: 50 amp hot tub #94079
07/07/05 12:52 PM
07/07/05 12:52 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,373
Estero,Fl,usa
A spa is a combination load with a significant part that is a "toaster wire" heater. The answer is in the manufacturer's instructions unless you want to start reading nameplate ratings and calculating.
You are still stuck in the 60c column with Romex.


Greg Fretwell
Page 1 of 2 1 2

Featured:

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

 

Member Spotlight
togol
togol
NW In. USA
Posts: 421
Joined: September 2005
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
UTEE87 1
Popular Topics(Views)
257,168 Are you busy
192,983 Re: Forum
182,648 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.029s Queries: 15 (0.004s) Memory: 1.0226 MB (Peak: 1.1988 MB) Zlib enabled. Server Time: 2019-07-21 23:16:28 UTC