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#47584 - 01/19/05 01:18 PM Sizing up feeders
RichardTatem Offline
Member

Registered: 01/18/05
Posts: 13
Loc: quincy,ma,02169
Iam wiring 5 apartment units, each unit having 60 amp panel, what is the the total service that I will need to have. wire size? amps size , thanks

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#47585 - 01/19/05 01:38 PM Re: Sizing up feeders
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
With the limited info given it would have to be 300 amps.

However I would bet that is way oversize.

The only way to give an accurate answer to this question would be to know the total calculated load.

Bob
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

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#47586 - 01/19/05 02:08 PM Re: Sizing up feeders
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
Richard, use article 220 to figure this out for yourself, then post you figures here.

Roger

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#47587 - 01/19/05 02:25 PM Re: Sizing up feeders
CTwireman Offline
Member

Registered: 02/07/02
Posts: 839
Loc: Connecticut, USA
With a question like that you wouldn't be wiring my apartment building.

My point is this: Everyone has their limitations. An electrician who has done commercial work for their whole career might be baffled by residential. Likewise, someone who only wires homes will probably have a hard time with a motor starter.

Peter D.

[This message has been edited by CTwireman (edited 01-19-2005).]
_________________________
Peter

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#47588 - 01/19/05 02:57 PM Re: Sizing up feeders
Bob Offline
Member

Registered: 02/05/02
Posts: 182
Loc: Mobile, AL, USA
Isn't this the same question you asked under
your post "amps"? Its hard to believe you would be installing only a 60 amp panel. I would think the min would be 100 amps.

[This message has been edited by Bob (edited 01-19-2005).]

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#47589 - 01/19/05 03:17 PM Re: Sizing up feeders
shortcircuit Offline
Member

Registered: 06/27/04
Posts: 608
Loc: massachusetts
230.79(C) restricts the minimum rating of 100 amps for each dwelling.

With an AC load of 40 amps for each unit, I'd say 400amp to 600amp depending on sq ft of each.

You need a public meter for general areas.

shortcircuit

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#47590 - 01/19/05 03:25 PM Re: Sizing up feeders
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
Shortcircuit, the 100 amp mininmum would only apply to a One-Family Dwellingsee definition of Dwelling, One-Family in article 100.

Richard, why don't you attempt to do the math and let us see what you come up with?

Peter has a good point, this seems to be out of your expertise.

Roger

[This message has been edited by Roger (edited 01-19-2005).]

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#47591 - 01/19/05 04:38 PM Re: Sizing up feeders
shortcircuit Offline
Member

Registered: 06/27/04
Posts: 608
Loc: massachusetts
Your correct Roger...I only looked at the definition of Dwelling Unit

shortcircuit

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