Back-fed Circuit Breakers [RE-wrenches]

[Bill Brooks]

E.H.,

If this is a stand-alone system and the subpanel is on the output of the
inverter, it is absolutely necessary since the breaker could come loose and
arc against the busbar. If it is in a utility-interconnected situation and
we are talking about the interconnection breaker in the utility main service
panel, it is absolutely unnecessary since the inverter deenergizes if the
breaker were to come loose.

Bill.


-----Original Message-----
From: EH Roy [mailto:ehroy at solar-works.com]
Sent: Friday, February 08, 2002 1:39 PM
To: RE-wrenches at topica.com
Subject: Back-fed Circuit Breakers [RE-wrenches]


On grid-interactive residential PV systems, I am finding that utility
inspectors are starting to insist on retainer kits for back-fed breakers in
the home load centers - as required by NEC Article 384-16 Section (g).

Does anyone have a good solution for older load centers and breakers (such
as Challenger and Wadsworth) that are not manufactured anymore? I have not
been able to find retainer kits for them and sure hope that the load center
and breakers don't have to be replaced.

Thanks for any help or ideas.

E. H. Roy
Solar Works, Inc.
64 Main Street
Montpelier, VT 05663
1-800-339-7804 ext. 306
ehroy at solar-works.com


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