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#32422 - 12/22/03 04:33 PM Can I calculate this like a cooking unit branch circuit?
Edward Offline
Member

Registered: 12/14/02
Posts: 309
Loc: California
I have a client who has two shirt printing machines. One 240V@22Amps and other 240V@30Amps. Can I treat this installation like a dwelling cooking unit branch circuit calculation?

Pull a 50A feeder and use #8 or #10 taps for two different 30A plugs.

PS. machines are heating units to dry the ink on the shirts.And this is in a residential garage.

Please give code sections.

Thanks
Edward
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#32423 - 12/23/03 04:17 AM Re: Can I calculate this like a cooking unit branch circuit?
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
It seems that 210.21(B)(3)would prohibit this.

BTW,
Are the loads continuous and/or simultaneous?

[This message has been edited by Redsy (edited 12-23-2003).]

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#32424 - 12/23/03 06:58 AM Re: Can I calculate this like a cooking unit branch circuit?
earlydean Offline
Member

Registered: 12/22/03
Posts: 749
Loc: Griswold, CT, USA
I would worry about zoning. Not too many towns allow businesses like this in a garage, and if they do, now you have a different occupancy to worry about. In a non-separated mixed occupancy there may be issues with the fire rating for the building. The BO or FM may require fire rated sheetrock and/or sprinklers to keep the garage business from burning up the house.
Electrically, I would have to re-compute the loads on the service. Do you need to upgrade the service for all this additional equipment?
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#32425 - 12/23/03 08:01 AM Re: Can I calculate this like a cooking unit branch circuit?
Edward Offline
Member

Registered: 12/14/02
Posts: 309
Loc: California
Redy,
Loads may be continuous and on at the same time.

Earlydean,
I do not need to upgrade the main panel. I was going to use a 50A braker from the subpanel.
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Edward

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#32426 - 12/23/03 01:10 PM Re: Can I calculate this like a cooking unit branch circuit?
hbiss Offline
Member

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
See Article 422.10(A) as well as 422.11 (D) &(E).
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