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#29744 - 09/23/03 07:50 PM 400 amp service residential  
jimmyinanniston  Offline
Junior Member
Joined: May 2003
Posts: 8
ohatchee,alabama,usa
when installing two 200 amp panels in paralell to a 400 amp meter base does the two 200 amp feeds need to be the same length? This is a residential application using ser and two 200amp disconects.


jimmy w. brown

Work Gear for Electricians and the Trades

#29745 - 09/23/03 08:04 PM Re: 400 amp service residential  
PCBelarge  Offline
Member
Joined: Jun 2003
Posts: 681
Dobbs Ferry, NY, USA
Jimmy
Yes they should be the same length.

Pierre


Pierre Belarge

#29746 - 09/23/03 08:12 PM Re: 400 amp service residential  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Pierre I think he means two separate runs from the 400 amp meter to two separate 200 amp panels. Parallel but not parallel conductors as in 310.4

If this is whats happening they do not have to be the same length.

Jim are the conductors joined together at one end or both ends?

Bob

[This message has been edited by iwire (edited 09-23-2003).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#29747 - 09/23/03 09:15 PM Re: 400 amp service residential  
jimmyinanniston  Offline
Junior Member
Joined: May 2003
Posts: 8
ohatchee,alabama,usa
yes 2 seperate runs to two seperate panels.


jimmy w. brown

#29748 - 09/23/03 10:01 PM Re: 400 amp service residential  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Jim in that case the run to one panel can be different from the other.

To be considered parallel conductors they would need to fit this description.

Quote
electrically joined at both ends to form a single conductor.


Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#29749 - 09/24/03 02:55 PM Re: 400 amp service residential  
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
Would it be possible to run 4" into the basement, or have a weather proof trough, and from that run the 200 amp service feeders to the panels?
Then splice the 500's along with the 2/0's to the panels. Is coming off the bottom of a 400 amp meter with 2- 200 amp runs, allowed?


#29750 - 09/24/03 03:52 PM Re: 400 amp service residential  
ElectricAL  Offline
Member
Joined: Oct 2001
Posts: 597
Minneapolis, MN USA
That's a pretty expensive assembly, for the customer, compared to two runs of SER cable.


Al Hildenbrand


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