New Mexico Administrative Code
Title 19 - NATURAL RESOURCES AND WILDLIFE
Chapter 15 - OIL AND GAS
Part 40 - NEW MEXICO LIQUEFIED PETROLEUM GAS STANDARD
Section 19.15.40.23 - MANUFACTURED HOMES
Universal Citation: 19 NM Admin Code 19.15.40.23
Current through Register Vol. 35, No. 24, December 23, 2024
A. Exterior gas piping.
(1) Location of
containers, containers and underground piping.
(a) Containers, appurtenances and underground
piping shall be installed in accordance with the currently adopted edition of
NFPA 54 and NFPA 58.
(b)
Underground gas piping shall not be installed under any manufactured home or
any attachments to the manufactured home. This is an exception to NFPA
54.
(2) All gas piping
beneath a manufactured home shall be adequately supported by galvanized, or
equivalently protective metal straps or hangers at least every four (4) feet,
except, where adequate support and protection is provided by structural
members.
(3) Gas shut-off valves
shall not be placed beneath a manufactured home.
(4) Any extensions or alterations made to the
gas piping system for the purpose of establishing the supply inlet for
connection to the riser may not reduce or restrict the gas piping size from
that of the original inlet.
(5)
There shall be only one point of crossover between the section of a multi wide
manufactured home, which must be readily accessible from the outside.
(6) Unless otherwise approved by
the bureau the connector used for the cross-over on multi wide manufactured
homes when gas is supplied to more than one (1) section, must be made by a
listed "quick disconnect" device which shall be designed to provide a positive
seal of the supply side of the gas system when such device is separated. Refer
to Exhibit #1.
(7) The crossover
connection shall be of the same size as the piping with which it directly
connects.
(8) The gas inlet on the
manufactured home shall protrude no more than six (6) inches from the
manufactured home. The inlet shall be rigidly anchored or strapped to a
structural member within six (6) inches of the point where it enters beneath
the manufactured home.
(9) Bond of
gas piping.
(a) Gas piping shall not be used
as an electrical ground.
(b) Gas
piping shall be bonded. Metallic gas piping shall be considered bonded if it is
connected to the terminal on the chassis of the manufactured home by clamps,
solderless connectors or by suitable ground-type straps.
(10) Location of riser: The gas riser shall
be located within twelve (12) inches of the manufactured home.
(11) Site connector. Each manufactured home
utilizing gas shall be connected to the manufactured home site outlet by an
approved mobile home connector not more than thirty-six (36) inches in length.
If encased flexible polyethylene pipe is used, a flexible connector shall not
be required. The above ground portion of the polyethylene flexible riser shall
not exceed thirty-six (36) inches in length and be installed so as to maintain
flexibility and compensate for expansion and contraction.
(12) Mechanical protection. All gas outlet
risers, regulators, meters, valves or other exposed equipment shall be
protected from mechanical damage by vehicles or other causes. Meters shall not
be supported by gas service piping. Regulators may be supported by the rigid
extended piping of the manufactured home.
(13) Maximum pressure permitted. Gas supplied
into the manufactured home shall not exceed 1/2 pounds per square inch gauge or
fourteen (14) inches water column.
(14) Gas pipe sizing. Gas piping systems
shall be sized so that the pressure drop to any appliance inlet connection from
any gas supply connections, when all appliances are in operation at maximum
capacity, is no more than 0.5 inch water column. Conformance may be determined
on the basis of test, or the gas piping system may be sized in accordance with
the current National Fuel Gas Code, NFPA 54.
B. Interior gas piping.
(1) Interior gas piping shall be installed in
accordance with the currently adopted edition of NFPA 54 and NFPA 58.
(2) Gas -fired appliances. Each gas-fired
appliance must have a listed shut-off valve located within three (3) feet of
the appliance and located in the same room as the gas appliance.
(3) Appliance connectors. Appliance
connectors shall not exceed three (3) feet in length, except for range
connectors, which shall not exceed six (6) feet in length.
(4) Inspection testing and purging.
Inspection testing and purging shall comply with the currently adopted edition
of NFPA 54.
C. Heat producing appliances. Every heat-producing appliance used in manufactured homes shall be listed or certified by an approved nationally recognized testing agency for this application.
(1) Fuel
conversion. Fuel burning appliances shall not be converted from one fuel to
another unless converted in accordance with the terms of its listing.
(2) Venting. Fuel burning, heating and
refrigeration appliances shall be of the vented type and vented to the outside.
In no case shall the vent of a gas-burning appliance terminate underneath the
manufactured home.
(a) Fuel burning
heat-producing appliances, except ranges, gas dryers and ovens, shall have
complete separation of the combustion system from the atmosphere of the
manufactured home. Combustion air inlets and flue gas outlets shall be listed
or certified as components of the appliance.
(b) Vents, roof jacks and special fittings
supplied as component parts of an appliance shall be installed in conformity
with the terms of their listing. A single wall metal vent shall not be used
unless it is a component part of a listed appliance.
(c) Vent terminations shall not be less than
three (3) feet from any motor driven air intake that opens into habitable
areas.
(d) Every joint of any vent
or vent connector shall be secure, rigid, and tight, in alignment and have
approved design and workmanship. Vent connectors shall be firmly attached to
draft hood outlets or flue collars by sheet metal screws or other approved
means, or the vent connectors using listed TYPE B or TYPE L gas vent materials
shall be securely assembled using the method shown in the manufacturer's
instructions.
(3) Gas
clothes dryers.
(a) Clothes dryers shall not
be installed in a room intended to be used for sleeping purposes.
(b) Clothes dryers shall be exhausted to the
outside air by a moisture lint exhaust duct and terminating fitting listed or
certified as components of the appliance.
(c) A clothes dryer moisture lint exhaust
duct shall not be connected to any furnace duct, gas vent or chimney.
(d) The moisture lint exhaust duct shall not
terminate beneath the manufactured home.
(e) Moisture lint exhaust ducts shall not be
connected with sheet metal screws or other fastening devices, which extend into
the duct.
(4)
Installation. The installation of each heat producing appliance shall conform
to the terms of its listing as specified on the appliance and in the
manufacturer's instructions. The installer shall leave the manufacturer's
instructions attached to the appliance. Every appliance shall be secured in
place to avoid displacement and movement from vibration and road shock.
(a) Instructions. Instruction operating
instructions shall be provided with the appliance.
(b) Marking. Information on clearances, input
ratings, lighting and shutdown shall be attached to the appliances with the
same permanence as the nameplate, and so located that it is easily readable
when the appliance is properly installed. Each fuel-burning appliance shall
bear a permanent marking designating the type(s) of fuel for which it is
listed.
(c) Accessibility. Every
appliance shall be accessible for inspection, service, repair and replacement
without removing permanent construction. Sufficient room shall be available to
enable the operator to observe the burner, control and ignition means while
starting the appliance.
(5) Location. Heat producing appliances shall
be so located that no doors, drapes or other such material can be placed or
swung closer to the front of the appliance than the clearances specified on the
labeled appliances.
(6) Clearances.
Clearances between heat producing appliances and adjacent surfaces shall not be
less than specified in the terms of their listing. Clearance spaces shall be
framed in or guarded to prevent creation of storage space within the clearance
specified.
D. Cross ventilation.
(1) All manufactured homes shall
have one (1) square foot of unrestricted venting area for every one
hundred-fifty (150) square feet of enclosed floor space. Vents shall be
uniformly distributed on the two
(2) opposite long-walls. At least one vent
shall be located within four (4) feet of each end wall.
Vents shall be constructed and installed to exclude entry of vermin and water.
(3) This
section shall not apply retroactive to existing installations that were in
compliance with the codes in effect at the time of installation or approved
prior to the effective date of this document.
E. Manufactured home parks.
(1) Fuel gas equipment and installation. Fuel
gas equipment and installations installed within a building in a manufactured
home park shall comply with the current standard for the Installation of Gas
Appliances and Gas Piping (NFPA 54), or the current standard for the Storage
and Handling of Liquefied Petroleum Gases (NFPA 58).
(2) Manufactured home park gas systems. Gas
equipment and installations within a manufactured home park shall be designed
and constructed in accordance with the applicable codes adopted by the
authority having jurisdiction.
(a) Required
gas supply. The minimum hourly volume of gas required at each manufactured home
lot outlet or any section of the mobile home park has piping system shall be
calculated as shown on Chart IV.
CHART IV-Demand Factors for use in Calculating Gas Piping Systems in Manufactured Home Parks.
|
No Of Manufactured Home Sites |
BTU Per Hour Per Mfg. Home Site |
|
1 |
125,000 |
|
2 |
117,000 |
|
3 |
104,000 |
|
4 |
96,000 |
|
5 |
92,000 |
|
6 |
87,000 |
|
7 |
83,000 |
|
8 |
81,000 |
|
9 |
79,000 |
|
10 |
77,000 |
|
11 to 20 |
66,000 |
|
21 to 30 |
62,000 |
|
31 to 40 |
58,000 |
|
41 to 60 |
55,000 |
|
Over 60 |
50,000 |
(b)
Lot shut-off valve. On systems supplied from a central container, each
manufactured home lot shall have an approved gas shut-off valve installed
upstream of the mobile home lot gas outlet and located on the outlet riser at a
height of not less than four (4) inches above grade. Such valve shall not be
located under any manufactured home. Whenever the manufactured home lot outlet
is not in use, the outlet shall be equipped with an approved cap or plug to
prevent accidental discharge of gas.
Disclaimer: These regulations may not be the most recent version. New Mexico may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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