If a service panel which has a single service disconnect for a sfd is located on a pole, and there is 1 overcurrent device which supplys a feeder to a panel for a seperate structure, does the subpanel need a single disconnect, or can up to 6 breakers in the subpanel serve as a disconnecting means? I have been under the impression that if there are up to 6 breakers at the subpanel that this acts as the disconnecting means, however one of my co workers believes that the "up to 6 breakers" is refering to other feeders and that a main disconnect is required so that the subpanel ungrounded busbar is disconnected. Check the 2001 CEC section 225-31,32,33,and 34. What do you think? Thanks
Main disconnect at a panel for a seperate structure?
- Thread starter davidw
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rick5280
Senior Member
Re: Main disconnect at a panel for a seperate structure?
I believe that any panel that fits the definition of either a lighting & appliance branch-circuit panelboard, or a power panel board, would be required to have a main breaker. An example of one that would not require it would be a pole mounted panel with one 100amp breaker, and say 1 50 amp breaker. This type of panel does not fit those definitions, so up to 6 handles is ok.
Rick Miell
I believe that any panel that fits the definition of either a lighting & appliance branch-circuit panelboard, or a power panel board, would be required to have a main breaker. An example of one that would not require it would be a pole mounted panel with one 100amp breaker, and say 1 50 amp breaker. This type of panel does not fit those definitions, so up to 6 handles is ok.
Rick Miell
- Location
- Illinois
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- retired electrician
Re: Main disconnect at a panel for a seperate structure?
Rick,
Don
Rick,
I don't agree. The OCPD required for a panel is not required by the code to be in that panel. The is no requirement for a panel to have a disconenct within the panel or even within sight of the panel. In my opinion, as long as the feeder breaker has a rating equal to or less than the rating of the panel at the second structure, 6 breakers are permitted to serve as the second structure disconnet per 225.33(A).
Don
david
Senior Member
- Location
- Pennsylvania
Re: Main disconnect at a panel for a seperate structure?
David W,
What is the separate structure? Your question is vague, and I?m concerned this may be a mobile home or a manufactured home where special rules may apply.
David
David W,
What is the separate structure? Your question is vague, and I?m concerned this may be a mobile home or a manufactured home where special rules may apply.
David
Re: Main disconnect at a panel for a seperate structure?
It is a general question, however I was relating it to a situation I came across which had a 200 amp pole mounted svc panel to a sfd with a ocpd and feeders to a subpanel with a main disconnect. This subpanel had many breakers to serve the sfd and also 2 sets of feeders with ocpd's serving a garage and another outbuilding and terminating in subpanels which had less than 6 breakers, but not a single main disconnect. Thanks for all the input, I think that answers it...David
It is a general question, however I was relating it to a situation I came across which had a 200 amp pole mounted svc panel to a sfd with a ocpd and feeders to a subpanel with a main disconnect. This subpanel had many breakers to serve the sfd and also 2 sets of feeders with ocpd's serving a garage and another outbuilding and terminating in subpanels which had less than 6 breakers, but not a single main disconnect. Thanks for all the input, I think that answers it...David
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