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sgoodno

08:08PM | 10/05/04
Member Since: 12/10/03
15 lifetime posts
Bvelectrical
Hello,

I attended a home inspection of a place I am considering purchasing. The electrical issues are giving me some concern. The inspector showed me his concerns with the main and subpanel. Apparently, a subpanel was installed at some point. The current owner double lugged the main lugs (after the 200A breaker in the main panel) for the subpanel. He used a 'main only' subpanel with no disconnects in the subpanel. Many branch circuits are used in the subpanel. The subpanel and main panels are right next to each other. Does this sound like the subpanel addition was properly done given that he used the 200A breaker in the main panel for a disconnect? I thought that you needed a disconnect in the subpanel as well. Does the location of the subpanel discount the use of a subpanel breaker or disconnect? Also, There are several brach circuit breakers that are double lugged. I understand that this is not up to NEC, correct? Thanks!!

Scott

tperez

09:04PM | 10/05/04
Member Since: 09/24/04
128 lifetime posts
The install of the subpanel was not installed properly and the inspector was right in expressing concern. The feeder overcurrent protection device cannot exceed the rating of the panelboard. The subpanel should have been protected by it's own overcurrent protection device. Double lugging is wrong and goes against the code.

U.S.M.C. Semper Fi !!!

Geno

10:02AM | 10/06/04
Member Since: 10/02/02
4 lifetime posts
The home inspector may or may not be correct. There are lugs and breakers that are listed and approved for more than a single conductor. If the wire was rated for 200 amps feeding the sub and was indeed after the 200 amp main it is perfectly legal to install without an additional disconnecting means. Your best bet if you have these concerns is to call a qualified licensed electrical professional to assess the installation. Most home inspecors I have personally been involved with are very limited in thier mechanical trades background and sometimes interpret codes or other information incorrectly.
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