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Section E3601 General Services

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E3601.1 Scope
This chapter covers service conductors and equipment for the control and protection of services and their installation requirements. (230.1)
E3601.2 Number of Services
One- and two-family dwellings shall be supplied by only one service. (230.2)
E3601.3 One Building or Other Structure Not to Be Supplied Through Another
Service conductors supplying a building or other structure shall not pass through the interior of another building or other structure. (230.3)
E3601.4 Other Conductors in Raceway or Cable
Conductors other than service conductors shall not be installed in the same service raceway or service cable in which the service conductors are installed. (230.7)

Exceptions:
  1. Grounding electrode conductors or supply side bonding jumpers or conductors shall be permitted within service raceways.
  2. Load management control conductors having overcurrent protection shall be permitted within service raceways.
E3601.5 Raceway Seal
Where a service raceway enters from an underground distribution system, it shall be sealed in accordance with Section E3803.6. (230.8)
E3601.6 Service Disconnect Required
Means shall be provided to disconnect all conductors in a building or other structure from the service entrance conductors. (230.70)
E3601.6.1 Marking of Service Equipment and Disconnects
Service disconnects shall be permanently marked as a service disconnect. [230.70(B)]
E3601.6.2 Service Disconnect Location
The service disconnecting means shall be installed at a readily accessible location either outside of a building or inside nearest the point of entrance of the service conductors. Service disconnecting means shall not be installed in bathrooms. Each occupant shall have access to the disconnect serving the dwelling unit in which they reside. [230.70(A)(1)(2), 230.72(C)]
E3601.7 Maximum Number of Disconnects
Each service shall have only one disconnecting means unless installed using one or more of the methods specified in Sections E3601.7.1 through E3601.7.3. In all cases, the maximum number of disconnecting means for any service shall not exceed six and the multiple service disconnecting means shall be grouped.
E3601.7.1 Separate Enclosures
A service with two to six separate enclosures with a single main service disconnecting means in each enclosure shall be permitted.
E3601.7.2 Panelboards
A service with two to six separate panelboards with a single main service disconnecting means in each panelboard shall be permitted.
E3601.7.3 Metering Centers
A service with two to six disconnecting means in separate compartments of a metering center shall be permitted. [230.71 (B), 230.72 (A)]
Exception: Disconnecting means installed as part of listed equipment and used solely for the following shall not be considered a service disconnecting means:
  1. Power monitoring equipment.
  2. Surge-protective device(s).
  3. Power-operable service disconnecting means. [230.71 (A)]
E3601.8 Emergency Disconnects
For one- and two-family dwelling units, all service conductors shall terminate in disconnecting means having a short-circuit current rating equal to or greater than the available fault current, installed in a readily accessible outdoor location. If more than one disconnect is provided, they shall be grouped. Each disconnect shall be one of the following:
  1. Service disconnects marked as follows: EMERGENCY DISCONNECT, SERVICE DISCONNECT.
  2. Meter disconnect switches that have a short-circuit current rating equal to or greater than the available fault current and all metal housings and service enclosures are grounded in accordance with Section E3908.7 and bonded in accordance with Section 3609. A meter disconnect switch shall be capable of interrupting the load served and shall be marked as follows: EMERGENCY DISCONNECT, METER DISCONNECT, NOT SERVICE EQUIPMENT.
  3. Other listed disconnect switches or circuit breakers on the supply side of each service disconnect that are suitable for use as service equipment and marked as follows: EMERGENCY DISCONNECT, NOT SERVICE EQUIPMENT.
Markings shall comply with Section E3404.12. [230.82 (3), 230.85]

Related Code Sections

Section E3601 Services, General Services
This chapter covers service conductors and equipment for the control and protection of services and their installation requirements. (230.1 ...