New Mexico Administrative Code
Title 14 - HOUSING AND CONSTRUCTION
Chapter 6 - CONSTRUCTION INDUSTRIES LICENSING
Part 6 - CLASSIFICATIONS AND SCOPES
Section 14.6.6.11 - MECHANICAL AND PLUMBING CLASSIFICATIONS

(1) A journeyman certificate of competence in the appropriate trade classification is required of all individuals performing mechanical and plumbing work; provided however, that an apprentice, as is defined in Section 60-13-2 NMSA 1978, may work under the direct supervision of a validly certified journeyman as that term is defined in Section 60-13-2 NMSA 1978. Journeyman certificates are classified according to the type of work the journeyman is certified to perform. A journeyman may engage in the trade authorized by the certificate of competence issued to the journeyman only when employed by an entity:

(2) Ratio of unregistered apprentices. The ratio of certified journeyman to unregistered apprentices must not exceed:

(3) Contracting of mechanical or plumbing work includes installations, alterations, repairs, servicing and maintenance which clarifies Section 60-13-3 NMSA 1978.

(4) Refer to Section 60-13-32 NMSA 1978, for the definitions of plumbing, fixtures and gas-fitting in reference d to these classifications.

(1) MM-1. Plumbing. Requires four years' experience. Install, alter, repair, service, and maintain plumbing, plumbing fixtures, and piping, includes incidental concrete supports, and excavating, trenching and backfilling; includes hot water heating systems not exceeding 30 p.s.i. or 400,000 b.t.u./hour input; piping for fuel, oil and gasoline; piping and appurtenances for solar thermal energy systems; potable water irrigation sprinkler systems; swimming pools and spas; includes pneumatic or electric controls and control wiring not greater than 24 volts; septic tanks, manholes and sewer lines; does not include installation of natural gas fired appliances or natural gas piping; piping and agricultural sprinkler irrigation system installation and maintenance on farm or ranch property that moves water for livestock use or irrigation purposes from a privately owned well or pipeline, not connected to a public potable water supply are exempt from licensing requirements. When connected to a potable water source all connections must be downstream of an approved back flow prevention device. If a backflow prevention device is required it shall be permitted and installed by a properly certified journeyman employed by an appropriately licensed contractor.

(2) MM-2. Natural gas fitting. Requires four years' experience. Install, alter, repair, service and maintain natural gas piping and fittings; install hot water heating systems not exceeding 30 p.s.i. or 400,000 b.t.u./hour input; steam and hot water boilers; may connect water to existing valved outlets; warm air heating systems including chimney connections, flues, refractories, burners, fittings valves, thermal insulation, accessories and incidental piping; warm air appliances and other listed gas appliances; incidental controls and control wiring, pneumatic control systems; includes all required excavating, trenching and backfilling. May not install LP Gas systems.

(3) MM-3. Heating, ventilation & air conditioning (HVAC). Requires four years' experience. Install, alter, repair, service and maintain HVAC air handling and refrigeration equipment and piping, including fans, coils, condensing units, self-contained packaged air conditioning or heating units, evaporative cooling units, and ductwork and accessories including solar air heating and cooled mechanical air handling and ventilation applications; may connect water to existing valved outlets, and install controls, and control wiring not to exceed 24 volts; may bid and contract for structural alterations, electrical wiring and other work incidental to this scope of work, provided such work is performed by a validly licensed contractor.

(4) MM-4. Heating, cooling and process piping. Requires four years' experience. Install, alter, repair, service and maintain hydronic heating, cooling and process piping, piping and appurtenances for steam and hot water systems of any temperature or pressure range, chilled water systems, condensing water systems and other process piping systems; includes air handling equipment, pressure vessels, heat exchangers, boilers, refrigeration water chillers, cooling towers, fuel oil tanks and fuel oil piping; electric controls and control wiring not to exceed 24 volts; install high pressure and process piping solar thermal energy systems of any temperature or pressure range conveying gas or fluids other than potable water; water based fire protection sprinkler systems, dry chemical fire protection systems.

(5) MM-98. Mechanical. Requires four years' experience. Indicates licensure in individual classifications MM-1 through MM-4 and covers all work described in these classifications, as well as work described in the MS-3, MS-6, MS-12 and MS-14.

(1) MS-3. Septic tanks & sewer. Requires two years' experience. Install, alter, repair, service or maintain septic tanks and private sewage disposal systems, manholes and sewer lines, beginning at a connection to a public or private utility and ending at a point five feet beyond the outside wall of a building or structured; excavate, trench, backfill and grade as necessary; install or repair incidental plug-in type electrical control panels, controls and control wiring not to exceed 24 volts.

(2) MS-6. Lawn sprinklers. Requires two years' experience. Install, alter, repair, service or maintain potable water sprinkler systems; excavate, trench, backfill and grade as necessary; backflow prevention devices incidental plug-in type electrical control panels, controls and control wiring not to exceed 24 volts.

(3) MS-12. Fire protection sprinkler systems. Requires four years' experience. Install alter, repair, service or maintain water-based fire protection systems required pressure or storage tanks, controls and control wiring up to 24 volts; excavate and backfill and install piping from structure to off-site water supply adjacent to fire protection system property; bid or contract for structural alterations, electrical wiring, etc., incidental to the system installation, provided such work is performed by a validly licensed contractor.

(4) MS-14. Dry chemical fire protection. Requires four years' experience. Install, alter, repair, or service or maintain gaseous or chemical based fire protection systems including carbon dioxide (CO), or clean agents; pressurized storage tanks, valves, temperature sensing devices, solenoid or safety shut-off devices and other incidental controls and control wiring up to 24 volts; bid or contract for structural alterations, electrical wiring, etc., incidental to the system installation, provided such work is performed by a properly licensed contractor.

(1) JP. journeyman plumber. Can work under a MM-1 or MM-98 license.

(2) JPF. journeyman pipe fitter. Can work under a MM-1, MM-2, MM-4 or MM-98 license.

(3) JG. journeyman natural gas fitter. Can work under an MM-2 or MM-98 license.

(4) JPG. journeyman plumber and natural gas fitter. Can work under a MM-1, MM-2 or MM-98 license.

(5) JR. journeyman refrigeration. Must demonstrate compliance with environmental protection agency (EPA) recovery requirements prior to a certificate being issued. Can work under an MM-3 or MM-98.

(6) JS. journeyman sprinkler. Can work under a MS-6, MM-1 or MM-98 license.

(7) JSM. journeyman sheet metal. Can work under a MM-3 or MM-98 license.

(8) JW. journeyman welder. Must obtain either a JP, JG, JPG, JPF or JSM certification and demonstrate compliance with the American society of mechanical engineers (ASME) section 9 certification. Can work under an MM-1, MM-2, MM-3, MM-4 or MM-98 license when holding the appropriate journeyman certification for the license classification.

(9) JMG. journeyman medical gas installer. Must obtain either JP, JG, JPG or JPF certification and demonstrate compliance with medical gas certification as referenced in 14.9.5 NMAC. Can work under an MM-1, MM-2, MM-4 or MM-98.

(10) MS-12J. journeyman fire protection sprinkler systems. Requires four years' experience Can work under a MS-12, MM-4 or MM-98 license.

(11) MS-14J. journeyman dry chemical fire protection. Requires four years' experience. Can work under a MS-14, MM-4 or MM-98 license.

(12) BO1. journeyman boiler operator. Low pressure only. Requires six months' experience. Can be employed by an institution that has a boiler; cannot perform construction or repair of a boiler.

(13) BO2. journeyman boiler operator. Low and high pressure. Requires six months' experience. Can be employed by an institution that has a boiler; cannot perform construction or repair of a boiler.