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Old 01-26-2017, 05:29 PM   #1
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Default Looking for clarification on CEC 64-112

Hi everyone,

Generally when connecting a utility-interactive solar inverter.. I put the the inverter on a 2-pole breaker in the main panel. Pretty simple.

I noticed there is a code rule CEC 64-112(2) that reads:

"... Except as provided by Subrule(3) the output of a utility-interactive inverter described in this Section shall be connected to the supply side of the service disconnecting means."

Can anyone tell me how the install of an inverter on the SUPPLY SIDE would be done properly? Like I said, I've generally done this the method outlined is Subrule 3 which basically allows you to connect the inverter to a branch circuit breaker.

Any information would be appreciated.
Thanks.
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Old 02-21-2017, 07:37 AM   #2
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Transfer switch
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Old 02-21-2017, 08:20 AM   #3
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Hi @ByronC , Hadn't seen your thread til now. Wondering if you've found an
answer. If not, perhaps repost it in the CEC forum. Think quite a few Canadians
only check that forum.
Don't know if I should comment as I've never put in a solar system. When I
looked at one a while ago the gear your talking about was mounted on the
outside of the house near the meter. Not sure but I think it had been
electrically inserted between the meter and the panel.
P&L
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Old 02-21-2017, 08:34 AM   #4
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Quote:
Originally Posted by ByronC View Post
Hi everyone,

Generally when connecting a utility-interactive solar inverter.. I put the the inverter on a 2-pole breaker in the main panel. Pretty simple.

I noticed there is a code rule CEC 64-112(2) that reads:

"... Except as provided by Subrule(3) the output of a utility-interactive inverter described in this Section shall be connected to the supply side of the service disconnecting means."

Can anyone tell me how the install of an inverter on the SUPPLY SIDE would be done properly? Like I said, I've generally done this the method outlined is Subrule 3 which basically allows you to connect the inverter to a branch circuit breaker.

Any information would be appreciated.
Thanks.
64-076 Interconnections to other circuits (see Appendix B)
Where an installation is supplied from a renewable energy system that is not intended to be interconnected with a supply authority, the switching equipment controlling the systems shall be constructed or arranged so that it will be impossible to accidentally switch on power from one source before power from another has been cut off.
64-112 Utility-interactive point of connection (see Appendix B)
(1) The output of a utility-interactive inverter or power conditioning unit shall be connected to the supply authority system in accordance with Section 84.
84-004 Interconnection
The outputs of interconnected electric power production sources shall provide protection against back-feed into a supply authority system fault.
Seems like an automatic transfer switch (ATS) would satisfy POCO and CEC. Feed from inverter and main panel breaker(s) to ATS then to sub-panel for ccts you want energized. Take the circuits out of the main panel that you want controlled and install into the sub-panel.
Kapeesh?
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