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1 members (Scott35),
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Joined: Jul 2004
Posts: 787
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Is there room to install three 40 A solid link disconnects in the laundry room? Could they all be tied together with a piece of all thread so they all operate together?
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Joined: Jul 2004
Posts: 9,928 Likes: 34
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"All thread" is not a "listed handle tie" so that would be a no.
Greg Fretwell
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Joined: Nov 2002
Posts: 244
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I wonder if 6 pole pull-outs similar to the the cheapie air conditioner
disconnects are available. If not, it seems it's a ripe time to market something like that.
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Joined: Jun 2004
Posts: 1,273
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Economically, does it make sense to use a mechanically held lighting contactor? The idea being that a simple toggle switch would throw six poles.
I remember 20A and 30A rating contactors by SqD.
Is any NEMA player coming out with a sweet solution for this application?
Tesla
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Joined: Nov 2000
Posts: 2,148
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You can't use contactors as disconnects.
Don(resqcapt19)
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Joined: Apr 2002
Posts: 7,381 Likes: 7
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Guess a sub-panel with a 'main' and three branch CBs is a way to go.
The lock-out (if needed by placement) could be installed on the 'main'.
(Two pole like may be used on an oven/range)
Oddly, I only came accross one job with this type unit about 2 years ago, the Ec was debating how to do this when I was there for a rough, and that job is still at a standstill ($$$$) Strange thing was the house has a 150 amp service!
John
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Joined: Jul 2004
Posts: 9,928 Likes: 34
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I would be interested in the load calc that would allow a 110 a water heater on a 150a service. What kind of range and HVAC equipment do they have?
Greg Fretwell
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Joined: Apr 2002
Posts: 7,381 Likes: 7
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Greg:
This is a resi that has an addition, with a service upgrade to 400 amp. The job has been at a standstill for quite some time (1 1/2 to 2 years) due to $$$$. The EC at the time was basically a lost soul with a few items, the WHtr only one of them.
John
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Joined: Feb 2002
Posts: 2,233
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Greg,
I agree that a sub panel by the water heater would be the best option. However what if there is no room? Say the new water heater is in a closet with no room for a sub panel? Then what?
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Joined: Jul 2004
Posts: 9,928 Likes: 34
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That is the same problem we have with air handlers. The AHJ has to make up his mind, do we waive 110.26 or the "within sight" rule. I guess that is why we make the big bucks 
Greg Fretwell
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Posts: 4,116
Joined: October 2000
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