- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I listed the articles below that I feel are pertinent to the question.
Lets say we have a 1000 amp service which consists of 5- 200 amp ML enclosures. In each enclosure I have a 150 amp breaker that is used as the service disconnecting means-- total of 5. Now I want to add another overcurrent protective device in one of the enclosure to meet the 6 handle rule. Where in 230.71 does it allow me to do this. It seems that exception 2 is left out of the article and this would not be compliant even though there are only 6 throws for the building. Can someone agree or not and maybe explain why exception 2 was left out
Lets say we have a 1000 amp service which consists of 5- 200 amp ML enclosures. In each enclosure I have a 150 amp breaker that is used as the service disconnecting means-- total of 5. Now I want to add another overcurrent protective device in one of the enclosure to meet the 6 handle rule. Where in 230.71 does it allow me to do this. It seems that exception 2 is left out of the article and this would not be compliant even though there are only 6 throws for the building. Can someone agree or not and maybe explain why exception 2 was left out
230.40 Number of Service-Entrance Conductor Sets.
Each service drop, set of overhead service conductors, set
of underground service conductors, or service lateral shall
supply only one set of service-entrance conductors.
Exception No. 2: Where two to six service disconnecting
means in separate enclosures are grouped at one location
and supply separate loads from one service drop, set of
overhead service conductors, set of underground service
conductors, or service lateral, one set of service-entrance
conductors shall be permitted to supply each or several
such service equipment enclosures.
230.71 Maximum Number of Disconnects.
(A) General. The service disconnecting means for each
service permitted by 230.2, or for each set of serviceentrance
conductors permitted by 230.40, Exception No. 1,
3, 4, or 5, shall consist of not more than six switches or sets
of circuit breakers, or a combination of not more than six
switches and sets of circuit breakers, mounted in a single
enclosure, in a group of separate enclosures, or in or on a
switchboard or in switchgear. There shall be not more than
six sets of disconnects per service grouped in any one location.
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