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05-10-2009, 09:46 AM
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#1
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Registered Member
Join Date: Nov 2007
Posts: 2,575
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Electric water heaters, cord & plug?
Never came across this before, 10/3 SO cable with a 30a 3 prong dryer cord cap. "Has always been this way" she said.
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05-10-2009, 09:51 AM
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#2
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Senior Member
Join Date: Jul 2008
Location: rome, ga.
Posts: 1,364
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wonder if some body was thinkin " disconnect means " ???? for service.
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05-10-2009, 09:53 AM
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#3
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Senior Member
Join Date: May 2009
Location: Chapel Hill, NC
Posts: 1,179
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Quote:
Originally Posted by LawnGuyLandSparky
Never came across this before, 10/3 SO cable with a 30a 3 prong dryer cord cap. "Has always been this way" she said.
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Never did it that way but I believe it is code compliant. It would be cheaper to put in a disco.
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05-10-2009, 10:30 AM
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#4
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Senior Member
Join Date: Feb 2008
Location: Atlanta, Ga/Hamilton, Al
Posts: 2,035
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For one, the dryer cord is not compliant, because that is a neutral terminal, not a ground.
Another is that most water heaters I have seen specifically state they are not to be cord and plug connected.
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05-10-2009, 10:35 AM
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#5
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Senior Member
Join Date: Feb 2007
Location: Eighty Four,Pa.15330
Posts: 1,662
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My water heater has a twistlock connection for my generator.
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05-10-2009, 11:19 AM
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#6
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Mad Skills
Join Date: Nov 2007
Location: NJ
Posts: 1,191
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Quote:
Originally Posted by Dennis Alwon
Never did it that way but I believe it is code compliant. It would be cheaper to put in a disco.
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BY the time you calculate the cost [material and labor] for the cord/plug set up....a $7 30A non-fused disco would be mounted and the water made hot.
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05-10-2009, 11:38 AM
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#7
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Senior Member
Join Date: May 2009
Location: Chapel Hill, NC
Posts: 1,179
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Quote:
Originally Posted by InPhase277
For one, the dryer cord is not compliant, because that is a neutral terminal, not a ground.
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I realize the difference between a neutral and a ground connection but I thought on a 3 wire dryer cord the neutral terminal is also connected to the mounting strap of the receptacle.
Quote:
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Another is that most water heaters I have seen specifically state they are not to be cord and plug connected.
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Gosh I don't believe I have ever read any EWH literature-- it is never there when I get there. 
Again I totally agree it is at best a funky install. My MO is a DP 30 amp switch where the disco is in a nice area otherwise a non fused disco as Celtic and I mentioned earlier.
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05-10-2009, 12:21 PM
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#8
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Member
Join Date: May 2009
Location: Northern Nevada
Posts: 76
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I've seen a ton of water heaters without disconnect. Does the NEC say it requires a disconnect?
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05-10-2009, 12:22 PM
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#9
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Senior Member
Join Date: May 2009
Location: Chapel Hill, NC
Posts: 1,179
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Quote:
Originally Posted by NevadaBoy
I've seen a ton of water heaters without disconnect. Does the NEC say it requires a disconnect?
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Check article 422.31
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05-10-2009, 03:16 PM
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#10
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Mad Skills
Join Date: Nov 2007
Location: NJ
Posts: 1,191
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Quote:
Originally Posted by Dennis Alwon
My MO is a DP 30 amp switch where the disco is in a nice area otherwise a non fused disco as Celtic and I mentioned earlier.
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I did about 100 of them a few years back...I still have nightmares 
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05-10-2009, 04:43 PM
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#11
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Moderator
Join Date: Jan 2007
Location: Beautiful Cumberland Valley, in PA
Posts: 6,920
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I seem to remember that cords for appliances have to be "listed appliance connectors".
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05-10-2009, 06:19 PM
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#12
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Registered Member
Join Date: Nov 2007
Posts: 2,575
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Well, it's rare to see an electric WH in residential here, since electricity has always been the highest in the nation. So when I do encounter it, it's always a different setup.
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05-10-2009, 06:22 PM
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#13
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Moderator
Join Date: Jan 2007
Location: Beautiful Cumberland Valley, in PA
Posts: 6,920
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I sort of a toss-up how I handle it. Most of the time I use a $9 "air conditioner disconnect" when I'm wiring up a new or replacement water heater in an old work situation. On new construction work lately I've favored the handle lockoff kit for the breaker. It's only 5 or 6 bucks. I still like the local disconnect better, since it's more likely to actually get used.
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05-10-2009, 06:41 PM
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#14
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Senior Moment
Join Date: Dec 2007
Location: Amite, LA
Posts: 461
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I live in the south and favor the the 10-3 romex shooting out from under the house to my plastic shed where the water heater is located and terminate with a flying splice outside with jap wrap 
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05-10-2009, 07:13 PM
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#15
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Senior Member
Join Date: Jul 2008
Location: rome, ga.
Posts: 1,364
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Quote:
Originally Posted by rlc3854
I live in the south and favor the the 10-3 romex shooting out from under the house to my plastic shed where the water heater is located and terminate with a flying splice outside with jap wrap |
you got a water HEATER!!!!????   when i get me a inside commode i just might me one too. 
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05-11-2009, 11:58 AM
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#16
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Senior Member
Join Date: Jan 2007
Location: Newnan, GA
Posts: 500
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Quote:
Originally Posted by paul d.
you got a water HEATER!!!!???? when i get me a inside commode i just might me one too. |
You need to wait on that double wide first.
They come with that there fancy indoor plumbing stuff!
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05-11-2009, 04:48 PM
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#17
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Professional Nit Picker
Join Date: Mar 2007
Location: Maryland
Posts: 652
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Quote:
Originally Posted by paul d.
you got a water HEATER!!!!???? when i get me a inside commode i just might me one too. |
You don't need no hot water to make that there commode work.
Theys work just fine with cold water
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05-11-2009, 05:02 PM
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#18
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Senior Member
Join Date: Jul 2008
Location: rome, ga.
Posts: 1,364
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Quote:
Originally Posted by manchestersparky
You don't need no hot water to make that there commode work.
Theys work just fine with cold water
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you guys from the big city sure knoe lots of stuff. 
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05-11-2009, 05:19 PM
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#19
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Licensed Pro
Join Date: Jan 2007
Location: Rahway, NJ
Posts: 2,790
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Not many electric HWH's around here, mostly gas-fired, but when I come across one I use the cheap non-fused disconnects, the same type I use for the A/C condensing units.
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05-11-2009, 05:20 PM
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#20
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Senior Member
Join Date: May 2009
Location: Chapel Hill, NC
Posts: 1,179
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Quote:
Originally Posted by MDShunk
I seem to remember that cords for appliances have to be "listed appliance connectors".
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I remember that also but I thought that was the literature that came with the dishwashers specifically.
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