The Meaning Of "Service Panel"

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Old 07-05-18, 09:55 AM
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The Meaning Of "Service Panel"

A house has a "master" disconnect (a breaker) next to the meter on an outside wall. From there a feed goes to a "large" load center (panel box if you insist) in the basement. This load center feeds two smaller (and subordinate) load centers.

Is the term "service panel" supposed to be able to refer to any of those four items, or just the large load center, or just the box next to the meter with the first whole house disconnect?
 
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Old 07-06-18, 09:03 AM
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My opinion would be just the first panel after the meter with the disconnect breaker.
 
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Old 07-06-18, 09:51 AM
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Quote taken directly from the NEC:
Service. The conductors and equipment for delivering electric
energy from the serving utility to the wiring system of
the premises served.
Service Equipment. The necessary equipment, usually consisting
of a circuit breaker(s) or switch(es) and fuse(s) and
their accessories, connected to the load end of service conductors
to a building or other structure, or an otherwise designated
area, and intended to constitute the main control and cutoff of
the supply.
 
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Old 07-06-18, 11:56 AM
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From there a feed goes to a "large" load center (panel box if you insist) in the basement. This load center feeds two smaller (and subordinate) load centers.
All three panels would be subpanels, but the term subpanel will not be found in the NEC. Subpanel generally just means it is fed from another upstream panel.



I agree with ibpooks when he said

My opinion would be just the first panel after the meter with the disconnect breaker.
 
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Old 07-06-18, 06:47 PM
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The service would be the first panel after the meter. Anything else is just a panel.
 
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Old 07-06-18, 08:58 PM
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Thanks.
.............................................
 
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Old 07-07-18, 02:56 AM
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Ok...this isn't over...now I'm confused. Is the box with the main disconnect breaker the "service panel" or not?

This "My opinion would be just the first panel after the meter with the disconnect breaker." can be read as "My opinion would be just the first panel, after the meter with the disconnect breaker." OR "My opinion would be just the first panel with the disconnect breaker, after the meter." The first would seem to designate #3 below, the second would seem to refer to #2.


Using the word panel to describe a panel is confusing...to me anyway.
1) Meter
2)box with main disconnect
3)breaker panel with multiple breakers, 2 of which feed two other panels.
4) & 5) "sub"panels fed by previous panel #3

Which is the "service panel"? I would probably have said 3...am I wrong? I mean, if you are servicing something fed from 4 or 5...then those could be service panels for that specific equipment. Heck, in the Navy we'd have to tag the first panel back, as well as what fed that for some systems.
 
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Old 07-07-18, 05:51 AM
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The NEC defines the service as the location where the neutral to ground bond occurs. It should be the first means of disconnect after the meter.

Panel can have main breakers without being a service.

Any better ?
 
 

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