Current through Register Vol. 35, No. 18, September 24, 2024
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.