N.M. Admin. Code § 14.12.5.16

Current through Register Vol. 35, No. 21, November 5, 2024

Section 14.12.5.16 - ELECTRICAL SYSTEMS, EQUIPMENT AND TESTING (NEW OR USED; PRE-OWNED OR RESOLD)

The following requirements apply to the installation of new, used, pre-owned or resold manufactured homes, unless otherwise indicated.

A. General requirements. The electrical system and equipment connection for a manufactured home produced under the Federal Manufactured Home Construction and Safety Standards Act shall comply with the manufacturer's installation instructions.

B. Testing procedures. After completion of all electrical wiring and connections, including crossovers, electrical lights, and ceiling fans, the electrical system must be tested at the site. Electrical systems and equipment testing shall be completed in accordance with the manufactures testing instructions.

C. Used, pre-owned and resales. If the manufacturer's installation instructions are not available for a used or pre-owned or resold manufactured home, the following requirements apply.

(1) General requirements.

(a) All manufactured homes shall be connected to the electrical power by means of a four (4) wire connection, with the fourth (4th) (green) wire acting as an equipment ground, grounding the home to the service pole or pedestal.

(b) No electrical power connection shall be spliced unless the splice is protected in an approved weather-tight raceway.

(c) Aluminum wire may be used in the state of New Mexico in size #2 or larger.

(i) Aluminum wire shall not be directly connected to copper wire without the use of an approved disconnect device.

(ii) Metallic gas, water, waste pipes, and air-circulating ducts on a manufactured home shall be bonded. They will be considered bonded if they are attached to the terminal on the chassis by clamps, solderless connectors, or by suitable grounding type straps.

(iii) All electrical wiring installed to an evaporative cooler must be installed in a protective conduit and the cooler must be installed in accordance to the manufacturer's listed instructions.

(iv) All electrical wiring installed to any air conditioning unit must be installed in accordance to the air conditioners manufacturer's listed instructions.

(2) Power cords.

(a) If the manufactured home is rated less than one hundred (100) AMPS and does not use an underground electrical supply, a listed power cord of the proper sizing may be installed pursuant to the manufacturer's installation manual or the national electric code (NEC).

(b) Only one (1) power cord may be connected to a manufactured home.

(c) The power cord must be a single continuous length and shall not exceed either the length requirements of the (NEC) or the rated ampacity, including voltage drop.

(d) When a power cord is used, it shall be protected at the connection by an over-load device sized pursuant to the NEC and the ampere rating of the cord.

(e) The power supply to the manufactured home shall be a feeder assembly consisting of not more than one manufactured home power-supply cord with integral molded cap.

(f) If the manufactured home has a power-supply cord, it shall be permanently attached to the distribution panelboard or to a junction box permanently connected to the distribution panelboard, with the free end terminating in an attachment plug cap.

(g) A listed clamp or the equivalent shall be provided at the distribution panelboard knock out to afford strain relief for the cord to prevent strain from being transmitted to the terminals when the power-supply cord is handled in its intended manner.

(h) The cord shall be of an approved type with four conductors, one of which shall be identified by a continuous green color or a continuous green color with one or more yellow stripes for use as the grounding conductor.

(i) Length of supply cord. The overall length of a power-supply cord, measured from the end of the cord, including bared leads, to the face of the attachment- plug cap shall not be less than 21 feet and shall not exceed 36 1/2 feet.

(j) The power-supply cord shall bear the following marking: "For use with manufactured homes."

(k) The point of entrance of the feeder assembly to the manufactured home shall be in the exterior wall, floor, or roof, in the rear third section of the manufactured home.

(l) Where the cord passes through walls or floors, it shall be protected by means of conduit and bushings. The cord may be installed within the manufactured home walls, provided a continuous raceway is installed from the branch- circuit panelboard to the underside of the manufactured home floor. The raceway may be rigid conduit, electrical metallic tubing or polyethylene (PE), polyvinylchloride (PVC) or acrylonitrile-butadiene-styrene (ABS) plastic tubing having a minimum schedule forty.

(3) Underground electrical supply.

(a) Manufactured homes which are rated at one hundred (100) AMPS and over, and which use an underground electrical supply, must be connected by a permanently installed feeder circuit.

(b) All underground feeder assemblies shall meet the requirements set forth in the edition of the national electrical code currently in effect pursuant to the Construction Industries Licensing Act, and must comply with manufacturers installation manual.

(4) Overhead electrical feeder.

(a) A manufactured home may have an overhead feeder installed provided it meets the following requirements.

(b) The mast weatherhead must be installed in accordance with the instructions provided by the manufacturer and must be located on the load bearing exterior wall.

(5) Overhead electrical supply.

(a) Overhead electrical supply may only be made to a manufactured home that is installed on an approved permanent foundation and pursuant to 14.12.5.11 NMAC.

(b) The mast weatherhead must be installed in accordance with the instructions provided by the manufacturer and the NEC, and must be located on the load bearing exterior wall.

(6) All connections must be installed in accordance with the service requirements of the national electrical code, NFPA No. 70 as set forth in the edition of the national electrical code currently in effect pursuant to the Construction Industries Licensing Act.

N.M. Admin. Code § 14.12.5.16

14.12.5.16 NMAC - Rp, 14.12.2.53 NMAC, 12-01-10