North Dakota Administrative Code › Title 24.1 - State Electrical Board › Article 24.1-06 - ELECTRICAL WIRING STANDARDS › Chapter 24.1-06-03 - WIRING METHODS AND MATERIALS › Section 24.1-06-03-01 - (NEC 300) Wiring methods

Current through Supplement No. 393, July, 2024
1. Agricultural
				buildings. This section covers all buildings housing livestock, poultry, and
				other areas of similar or like nature. All electrical panel boards, wiring
				devices, and equipment must be installed in accordance with the provisions of
				article 547, 2017 edition, National Electrical Code.
A site-isolating device must be permitted to be installed at
				  the distribution point where two or more agricultural building structures are
				  supplied from the distribution point.
2. Electric metallic tubing may not be used
				in concrete below grade, in concrete slab or masonry in direct contact with
				earth. A vapor barrier, if used, has no effect on the requirements of the
				section. Electric metallic tubing may not be embedded in earth or
				fill.
3. Aluminum conduit may not
				be installed in contact with earth or embedded in concrete.
4. The installation of rigid nonmetallic
				conduit must comply with the provision of article 352, 2017 edition, National
				Electrical Code. Expansion fittings for rigid nonmetallic conduit must be
				provided to compensate for thermal expansion and contraction in accordance with
				section 352.44, 2017 edition, National Electrical Code. When installed outdoors
				and above grade, one hundred forty degrees Fahrenheit [60 degrees Celsius] must
				be considered the minimum change in degrees.
5. Fertilizer rooms, meatpacking plants, salt
				processing plants, and similar locations are judged to be occupancies where
				severe corrosive conditions are likely to be present. It is recommended
				nonmetallic conduit with nonmetallic boxes and fittings be used as the wiring
				method for such occupancies. Ferrous and nonferrous metal raceways must be used
				providing the raceway, boxes, and fittings are properly protected against
				corrosion.
6. In any room of an
				existing building where the sheetrock or wall covering has been removed from
				all walls, the electrical wiring requirements must comply with the provisions
				of 2017 edition, National Electrical Code.
7. Metal raceways or metal clad cable (type
				MC) rated for the environment must be installed in the following occupancies:
a. Hospitals;
b. Nursing homes;
c. Related patient care areas;
d. Places of assembly; and
e. Dormitories designed to house more than
				sixteen people.
Metal raceways or metal clad cable (type MC) must be used in
				  fixed wiring methods including fire alarms along with metal boxes or
				  nonmetallic raceways encased in not less than two inches [1.27 centimeters] of
				  concrete.
Exception 1: As provided in article 640, 2017 edition,
				  National Electrical Code, sound reproduction and similar equipment; in article
				  800, 2017 edition, National Electrical Code, communication circuits; and in
				  article 725, 2017 edition, National Electrical Code, for class 2 and class 3
				  remote control and signaling circuits.
Exception 2: Listed two-hour fire-rated cables as permitted
				  in article 695.6, article 700.9D, and article 760, 2017 edition, National
				  Electrical Code.
Adjacent areas separated by an approved fire barrier may be
				  wired in any approved wiring method in chapter 3 of the 2017 edition, National
				  Electrical Code. For the purpose of this section, a fire barrier is defined as
				  a continuous assembly, vertical or horizontal, in accordance with locally
				  adopted codes or the State Building Code.