Section 316.230. Services.

 

(1)   Number of services.

(a) These are department informational notes to be used under NEC 230.2 (intro.):

Note: See definition of building in s. SPS 316.100 (2) (a) .

Note: It is recommended that the electric utility or cooperative supplying electric current be contacted prior to service equipment installations for any special requirements.

(b) Substitute the following wording for NEC 230.2 (B) (2): Two or more service drops or laterals for the same class of service if located more than 150 feet apart, measured in a straight line, and provided that all electrical wiring supplied by each service has no common raceway or connection with any other service.

(c) This is a department rule in addition to the requirements of NEC 230.2 (B): For a building which is not more than 3 stories in height and which contains only 3 or more attached, vertically separated, side-by-side or back-to-back dwelling units, with each dwelling unit served by an individual exterior exit within 6 feet of the exit discharge grade, a separate service drop or lateral shall be permitted for each 2 attached units.

(2)   Number of service-entrance conductor sets. The requirements specified in NEC 230.40 Exception No. 3 are not included as part of this chapter.

(3)   Service equipment — disconnecting means.

(a) General. This is a department rule in addition to the requirements of NEC 230.70: Disconnecting means shall be provided to disconnect the utility wiring from the premises wiring at any point where utility wiring terminates and premises wiring extends overhead or underground to more than one building or structure.

(b) Location. This is a department rule in addition to the requirements of NEC 230.70 (A): Raceways containing service conductors or cables, or service entrance cable not contained within a raceway, may not extend longer than 8 feet into a building to the service disconnect or the first service disconnect of a group of disconnects as permitted by NEC 230.71. The raceways or conductors shall be considered to have entered the building at the point where they pass through the outer surface of the building exterior, except as permitted by NEC 230.6.

(4)   Rating of service disconnecting means. This is a department rule in addition to the requirements of NEC 230.79:

(a) Two- or multi-family dwellings . Except as provided in par. (b) , for 2-family or multi-family dwellings, the service equipment shall have a rating of not less than 150 amperes, 3-wire or 4-wire. Where the combined rating of all service disconnecting means is 150 amperes or larger, the service or feeder equipment rating for each dwelling unit shall have a rating of not less than 60 amperes.

(b) Exception . Service equipment having a rating of not less than 100 amperes, 3-wire or 4-wire, may be installed in an existing 2-family dwelling only where both of the following conditions are complied with:

1. The load computed in accordance with NEC 220 does not exceed 80 amperes.

2. Specific written approval is granted by the municipal inspection department having jurisdiction.

CR 08-047 : cr. Register February 2009 No. 638 , eff. 3-1-09; CR 13-042 : renum. (3) to (3) (b) and am. (3) (b) (title), renum. (4) to (3) (a) and am. (3) (title), (3) (a) (title), renum. (5) to (4) Register November 2013 No. 695 , eff. 12-1-13.