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// CODE SNIPPET

230.2 Number of Services

National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 230 Services > 230.2 Number of Services
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A building or other structure served shall be supplied by only one service unless permitted in 230.2(A) through (D). For the purpose of 230.40, Exception No. 2 only, underground sets of conductors, 1/0 AWG and larger, running to the same location and connected together at their supply end but not connected together at their load end shall be considered to be supplying one service.

(A) Special Conditions

Additional services shall be permitted to supply the following:
  1. Fire pumps
  2. Emergency systems
  3. Legally required standby systems
  4. Optional standby systems
  5. Parallel power production systems
  6. Systems designed for connection to multiple sources of supply for the purpose of enhanced reliability

(B) Special Occupancies

By special permission, additional services shall be permitted for either of the following:
  1. Multiple-occupancy buildings where there is no available space for service equipment accessible to all occupants
  2. A single building or other structure sufficiently large to make two or more services necessary

(C) Capacity Requirements

Additional services shall be permitted under any of the following:
  1. Where the capacity requirements are in excess of 2000 amperes at a supply voltage of 1000 volts or less
  2. Where the load requirements of a single-phase installation are greater than the serving agency normally supplies through one service
  3. By special permission

(D) Different Characteristics

Additional services shall be permitted for different voltages, frequencies, or phases, or for different uses, such as for different rate schedules.

(E) Identification

Where a building or structure is supplied by more than one service, or any combination of branch circuits, feeders, and services, a permanent plaque or directory shall be installed at each service disconnect location denoting all other services, feeders, and branch circuits supplying that building or structure and the area served by each. See 225.37.

Related Code Sections


230.2 Wiring and Protection, Number of Services
A building or other structure served shall be supplied by only one service unless permitted in 230.2(A) through (D). For the purpose of 230.40 ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 230 Services > 230.2 Number of Services
(E) Wiring and Protection, Identification
Where a building or structure is supplied by more than one service, or any combination of branch circuits, feeders, and services, a permanent plaque ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 230 Services > 230.2 Number of Services > (E) Identification
(A) Supervising Station Alarm Systems,
Systems Trunks System Type Type 4 Type 5 Maximum number of alarm service initiating device circuits per primary trunk ...
National Fire Alarm and Signaling Code 2016 of Minnesota > 26 Supervising Station Alarm Systems > 26.6 Communications Methods for Supervising Station Alarm Systems > 26.6.5 Radio Systems > 26.6.5.2* One-Way Private Radio Alarm Systems > 26.6.5.2.1 Independent Receivers > (A)
26.6.5.2.1 Supervising Station Alarm Systems, Independent Receivers
Systems Trunks System Type Type 4 Type 5 Maximum number of alarm service initiating device circuits per primary trunk ...
National Fire Alarm and Signaling Code 2016 of Minnesota > 26 Supervising Station Alarm Systems > 26.6 Communications Methods for Supervising Station Alarm Systems > 26.6.5 Radio Systems > 26.6.5.2* One-Way Private Radio Alarm Systems > 26.6.5.2.1 Independent Receivers
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