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#196906 - 11/01/10 10:26 AM Re: New water heater
harold endean Offline
Member
Registered: 02/16/02
Posts: 2233
Loc: Boonton, NJ
Has anyone seen those brand new water heaters that are instantaneous and they need 3-40 amp feeds? What do you do about a disconnect within 50' and/or within eyesight?
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#196909 - 11/01/10 12:04 PM Re: New water heater [Re: harold endean]
KJay Offline
Member
Registered: 11/27/07
Posts: 763
Loc: MA, USA
I suppose they could pull a properly sized feeder and install a small subpanel to an area within sight of the equipment, then run the needed branch circuits to the water heater from there.
One thing though… I know that the SQD QO 6/12 circuit panels I have are only rated at 100A, so not sure if they are available with a higher ampere rating.
If not, then one possible problem might be if the feeder were sized only as needed for the water heater loads but, a larger panel was install installed because of the needed higher ampere rating. Someone else could come along later and run additional circuits out of it to feed other loads.
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#196915 - 11/01/10 03:24 PM Re: New water heater [Re: KJay]
crselectric Offline
Member
Registered: 09/24/06
Posts: 133
Loc: albany, ca
I'm working on the same thing, in richmond ca, trying to find a small robust panel on opposite side of wall in 1100 sq. ft house, and not have to put in a 20 space panel for 6 slots?
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#196916 - 11/01/10 04:01 PM Re: New water heater [Re: crselectric]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9038
Loc: Estero,Fl,usa
I saw some 6/12s on the SqD site but they are more expensive than a 20/40.
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Greg Fretwell
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#196925 - 11/01/10 05:56 PM Re: New water heater [Re: gfretwell]
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6776
Loc: Brick, NJ USA
The OCP for the subpanel will prevent the feeder from OL. I seem to remember a GE panel that was 125 amp rated buss.

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John
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#196948 - 11/02/10 08:33 AM Re: New water heater [Re: HotLine1]
harold endean Offline
Member
Registered: 02/16/02
Posts: 2233
Loc: Boonton, NJ
How about a contactor in a small panel with a push button/switch by the heater?

How about a lock out on the service panel?
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#196954 - 11/02/10 10:57 AM Re: New water heater [Re: harold endean]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9038
Loc: Estero,Fl,usa
If you have a sub panel within sight of the water heater that can be your disconnect.
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Greg Fretwell
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#196965 - 11/02/10 09:26 PM Re: New water heater [Re: gfretwell]
Niko Offline
Member
Registered: 08/17/06
Posts: 356
Loc: Campbell, CA
Is that 3 separate heaters turning ON separate times, or all three turn ON at the same time?

I bet that will dim the lights every time it turns ON. Wouldn't that be annoying? Have you informed the customer on the possibility of the lights dimming?
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Be kind to your neighbor, he knows where you live

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#196969 - 11/03/10 06:35 AM Re: New water heater [Re: Niko]
harold endean Offline
Member
Registered: 02/16/02
Posts: 2233
Loc: Boonton, NJ
Greg,

I agree that if there is a sub panel or service panel within 50/eyesight, then we would meet the code. However the service is in the basement and the house is finished, and they install a new water heater in the laundry room, Now what? Could you accept a lockable breaker(s) for the disconnect? Install a sign on water heater stating that the heater has multiple feeds?
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#196972 - 11/03/10 11:44 AM Re: New water heater [Re: harold endean]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9038
Loc: Estero,Fl,usa
This might be the compelling reason to put the sub panel near the water heater.
I know the code allows lockable breakers, how many homeowners actually understand LOTO procedures or have the proper equipment?
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Greg Fretwell
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