Code of Maine Rules
02 - DEPARTMENT OF PROFESSIONAL AND FINANCIAL REGULATION
385 - MANUFACTURED HOUSING BOARD
Chapter 850 - COMMUNITY LICENSING - STANDARDS
Appendix 385-850-A - COMMONLY-VIOLATED PROVISIONS OF THE NATIONAL ELECTRICAL CODE(®)
(code provisions not reproduced verbatim)
1. Minimum depth for direct-buried service or feeder cable [Table 300.5]
24" under park roads
18" from the service equipment location to the home served (applies when service equipment is within 30' of the exterior wall of the home)
24" for all other locations
2. Minimum depth for buried PVC conduit enclosing service or feeder conductors [Table 300.5]
24" under park roads
18" from the service equipment location to the home served (applies when service equipment is within 30' of the exterior wall of the home)
18" for all other locations
3. Protection from damage for direct-buried service and feeder cables emerging from grade [Table 300.5 (D)(1)]
PVC or other approved electrical raceway shall be installed continuous from the electrical service equipment to 18" below grade. Where metal raceways are used, a bushing shall be installed at the base of the conduit to prevent damage to the conductors.
4. Unused openings in electrical equipment [110.12(A)]
Unused cable or conduit openings in meter sockets, disconnects, and other electrical equipment shall be effectively closed to provide protection that is equivalent to the wall of the equipment.
5. Mounting of electrical equipment [110.13(A)]
Electrical equipment shall be firmly secured to the surface on which it is mounted. Also, the mounting surface must be solidly supported.
6. Enclosing energized parts [230.62(A)]
The interior cover of service disconnects must be installed to avoid accidental contact with live parts.
7. Ground movement [300.5(J)]
Where direct-buried conductors or underground raceways are subject to movement from frost action, provision shall be made to protect the conductors and equipment from damage. "S" loops in underground direct burial to conduit transitions, and expansion fittings in vertical conduits are usually effective.
8. Securing the grounding electrode conductor [250.64(B)]
The conductor from the service equipment to the ground rod shall be securely fastened to the surface on which it is carried.
9. Methods of grounding to ground rods [250.70]
The grounding conductor must be solidly connected to the ground rod by the use of an approved clamp, listed for direct soil burial.
Note: Direct buried conductors and cables emerging from grade and specified in Column 1 and 4 of Table 300.5 shall be protected by enclosures or raceways extending from the minimum cover distance below grade required by 300.5 (A) to a point at least 8' above finish grade.
NATIONAL ELECTRICAL CODE(®) IS A REGISTERED TRADEMARKS OF THE NATIONAL FIRE PROTECTION ASSOCIATION.
