Originally Posted By: Robert Gallahorn
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Are sub panels with more than six circuits required a main in the sub panel?
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It’s all in the wording
Are sub panels with more than six circuits required a main in the sub panel?
Originally Posted By: jhagarty
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Is the sub panel supplied power via a Breaker in the Main Panel?
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Joseph Hagarty
HouseMaster / Main Line, PA
joseph.hagarty@housemaster.com
www.householdinspector.com
Phone: 610-399-9864
Fax : 610-399-9865
HouseMaster. Home inspections. Done right.
Originally Posted By: Robert Gallahorn
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Yes, supplied off a main disconnect, but at a remote location. Six circuit sub is the panel servicing a small eff. apt.
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It’s all in the wording
Originally Posted By: Robert Gallahorn
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And would the addition of another circuit change the requirements?
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It’s all in the wording
Originally Posted By: jburkeson
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No,
The sub panel does not require a main to be located within the panel nor would adding a 7th circuit breaker cause the requirement.
The 6-switch rule applies to service equipment only and states that to disconnect the building from the utility there shall be no more than 6-switches.
That is why as long as there is a main circuit breaker in the service panel you then can have any number of branch circuit breakers as necessary, which may or may not include sub feeders to other sub panels.
A conventional house panel with a main circuit breaker can have up to 42 branch circuit breakers which will all be powered down should the main open.
A small building with 5 apartments and 1 house panel might be fed from a single wireway connected directly the utility meter pan via 6 enclosed circuit breakers or fused disconnects. These switches would then be considered service switches, under that scenario adding another service switch would violate the 6-switch rule and require that a main disconnect be placed in-between the meter pan and the wireway. Once the main service switch was installed the other switches downstream would no longer be considered service switches they would then become part of the distribution system.
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Joseph Burkeson, RPI (Hooperette)
?Anyone who has proclaimed violence his method inexorably must choose lying as his principle.?
~ Aleksandr Solzhenitsyn
Originally Posted By: chorne
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each apartment should have its own panel with disconnect
Originally Posted By: Robert Gallahorn
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Each unit has its own panel (the 6 circuit) and a main (in the mechanical room several floors below).
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It’s all in the wording
Originally Posted By: Greg Fretwell
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You sound like you are OK with the 6 breakers and if the occupant has access to the mechanical room there is no issue at all.
230.72 Grouping of Disconnects.
(A) General. The two to six disconnects as permitted in 230.71 shall be grouped. Each disconnect shall be marked to indicate the load served.
(C) Access to Occupants. In a multiple-occupancy building, each occupant shall have access to the occupant?s service disconnecting means.
Exception: In a multiple-occupancy building where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the service disconnecting means supplying more than one occupancy shall be permitted to be accessible to authorized management personnel only.