The following exceptions and modifications are found necessary to meet conditions and shall prevail in the case of conflict thereof with any of the provisions in the National Electrical Code:
A. Commercial, Industrial, Multi-Family Residence: All commercial, industrial and multi-family residence service shall be in rigid conduit. All interior wiring in commercial, industrial and multi- family residences shall be in thin wall (EMT) conduit.
B. Detached, Single-Family Residence: Detached, single-family residence and associated accessory structures service shall be in rigid, IMC or in thin wall (EMT) metal conduit. All interior wiring in single-family residences shall be in BX or in thin wall (EMT) conduit or shall be grounded NM cable.
C. Grounding: All metal noncurrent carrying parts of enclosures of electrical equipment and metal boxes shall be grounded. The ground wire shall be secured to a cold water pipe when such pipe is available. If such pipe is not available, then the ground shall be secured to a ground rod at least eight feet (8') in length. No ground shall be secured to any fixture or fitting. All buildings having metal siding shall be grounded by means of two (2) ground rods, eight feet (8') in length, located on opposite corners.
D. Lighting Fixtures: All lighting fixtures located above tubs and showers shall be ground fault interrupter (GFI) protected.
E. Wiring: Wiring for dining rooms, kitchens, laundries and utility rooms in all residences shall not be smaller than no. 12 AWG wire and no more than three (3) appliance outlets shall be located on any separate individual circuit. All furnaces, boilers, washers, dishwashers, air conditioners, wells and sump pumps shall be wired on separate circuits of wire not smaller than no. 12 AWG.
F. Wiring In Existing Structures: The existing type of wiring may be followed where additional outlets are being installed in any existing structure. However, where a building addition is being constructed, the type of wiring in the existing structure shall not be followed unless such existing wiring complies with the provisions of this chapter.
G. Meter Sockets: Meter sockets on new single-family construction shall be located on the side of the house closest to the source.
(1987 Code § 7-125)