The JG journeyman natural gas fitter certificate is New Mexico’s individual gas-fitting credential: issued by the Construction Industries Division under 14.6.6.11D NMAC, held by a journeyman who works under an MM-2 or MM-98 license, and gated by two years of experience inside ten years and an examination whose passing score the rule states as 75% or higher. This guide follows the certificate from its name through its gate, its published examination rules, its fee layer, and its renewal clock — and states its unpublished mechanics exactly as the sources leave them.
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The credential at a glance
| Item | Verified position |
|---|---|
| Program | New Mexico JG Journeyman Gas Fitter — the JG journeyman certificate examination layer |
| Regulator | Construction Industries Division (CID), Regulation and Licensing Department, under the CILA and NMAC Title 14, Chapter 6 |
| Certificate | JG — journeyman natural gas fitter, an individual journeyman certificate under 14.6.6.11D NMAC |
| Passing standard | A passing score is 75% or higher — 14.6.4.8C(2) NMAC |
| Experience gate | Two years (4,000 hours) of experience, all within the last 10 years; approved training credited at half rate, capped at half the requirement |
| Supervision | Works under an MM-2 or MM-98 license |
| Examination fee | $25 — the CID rule fee for a mechanical journeyman examination, 14.5.5.9B NMAC |
| Term and renewal | Three-year term; renewal $25 per year per classification held; 16 hours of continuing education, at least 8 on the current CID code |
| Retakes | The same examination not more than twice within a 30-day period |
| Administrator note | PassProfessor is independent and is not affiliated with the Construction Industries Division |
How to read this guide: a certificate led by its name
Most licensing errors in this corner of the New Mexico system are naming errors that become scope errors. A candidate reads a shortened label, assumes the widest trade the label could describe, and then prepares — or worse, works — to that assumption. The JG resists that habit at the source. The rules name the certificate the journeyman natural gas fitter, and this guide uses that full name as its anchor throughout: the work this program prepares a candidate for is described only as natural gas fitting work, performed under the licenses the certificate framework names. Nothing in this guide widens the certificate’s name into a broader fuel credential, and nothing borrows a neighbouring certificate’s scope to fill it out. The combined JPG certificate exists in the same family and is a different instrument; the JR and JSM certificates sit beside the JG with their own supervision lines. Each is named here only at the boundary, so the JG’s own shape stays clear.
The second discipline is the tier discipline that governs the whole New Mexico mechanical system. The contractor tier is held by a business through a qualifying party: the license carries the classification, the qualifying party passes the contractor examinations, and the business contracts with the public. The certificate tier — where the JG sits — certifies individuals: the journeyman’s own experience and examination, and a defined place under the contractor tier’s licenses. Fees, continuing education, and examination mechanics differ between the tiers and are stated in different provisions — contractor material principally at 14.6.3 NMAC, journeyman certification at 14.6.4.8. This guide keys every figure to the journeyman layer. The companion New Mexico JG Journeyman Gas Fitter program page summarises the certificate; this guide is the deep version.
The supervision frame in full
The line above the JG. A JG certificate holder works under an MM-2 or MM-98 license. MM-2 is the natural gas fitting contractor classification; MM-98 indicates licensure across the MM-1 through MM-4 classifications and the further classifications the rule attaches to it. Either way, the structure is the same: the license belongs to the business, contracting with the public runs through that license and its qualifying party, and the JG holder performs the certified journeyman work inside that frame. The certificate does not itself authorise contracting, and a JG holder who takes work directly from the public in the holder’s own name has stepped outside the instrument the state issued — a distinction the classification rules enforce generally, since work outside the scope of one’s classification violates the Construction Industries Licensing Act under 14.6.6.8A NMAC.
The line below the JG. An apprentice may perform mechanical and plumbing work only under the direct supervision of a validly certified journeyman, employed by a validly licensed person or the holder of a valid annual permit — 14.6.4.8A(1) NMAC. The JG holder is therefore a supervision anchor as well as a supervised worker: the same certificate that places the holder under a contractor license places apprentices under the holder’s direct supervision. Note what the current rules do and do not say at this rung: no apprentice registration scheme and no numeric supervision ratio appears in the journeyman or classification rules as currently compiled, and this guide states none. The supervision is defined by its quality — direct, by a certified journeyman, inside a licensed employment frame — not by a headcount.
The classification frame around both lines. Licenses and certificates are issued in classifications carrying letter-number symbols; the field letter M covers the mechanical and plumbing classifications. The mechanical contractor classifications sit at 14.6.6.11B and carry their own four-year qualifying-party gate — the contractor tier’s gate, recorded here only so it is never mistaken for the JG’s two-year gate below. The journeyman certificates sit at 14.6.6.11D. A candidate who can place the JG on that map — certificate provision, supervision line, classification letter — has the framework every other fact in this guide hangs from.
The route, step by step
Step one — build the experience record inside the window. Two years, 4,000 hours, all within the last 10 years, with any training credit documented under the half-rate rule examined in depth below. Step two — apply, through CID or its designee, knowing the six-month clock starts on receipt: all certification requirements must be met within six months or the application expires and all fees paid are forfeited. Step three — sit the examination administered by CID or its designee and reach the rule’s standard: a passing score is 75% or higher. Step four — receive the certificate once every requirement stands met inside the application’s life. Step five — work and renew inside the frame: under an MM-2 or MM-98 license, on a three-year term, with the code-weighted continuing education completed before renewal. At the route’s edge, the rule layer records an expedited path for military members and veterans — the certificate issued as soon as practicable and no later than 30 days after a completed application, with no license or certificate fee for their first three years.
The gate in depth: two years, a ten-year window, and the half-credit rule
The experience requirement reads simply — two years (4,000 hours) — and repays exact reading, because two separate limits are folded into it. The first is the recency limit: all experience must fall within the last 10 years. A gas fitter whose deepest experience sits outside that window may hold a long career and still hold little countable experience; the window, not the career, is measured. Candidates should audit their own record against the window before anything else, because every later step — training credit, application timing, examination scheduling — is planned against countable hours, not remembered ones.
The second is the training-credit limit. Journeyman applicants may use credited training toward the experience requirement where approved, under the rule at 14.6.4.8C(1): accredited technical training counts in lieu of work experience at one-half year of experience per year of training, and credited training may never exceed one-half of the total experience requirement.
Work the arithmetic once, slowly, because candidates misjudge it in both directions. One full year of accredited training earns one-half year of experience credit. Two years of training would nominally earn a full year of credit — and that is exactly the cap, one-half of the two-year requirement, so no amount of additional schooling adds more. The remaining half of the gate — at least one full year, 2,000 hours, of worked experience inside the window — is always worked. Training shortens the road by at most half; it never paves it. The mirror error is just as common: dismissing training altogether because it cannot complete the gate. A candidate with two years of approved training and one year of windowed work experience meets the gate exactly, and a candidate who ignores the credit may spend an extra year qualifying for a certificate the rules already allow. Keep the layers separate in the record as well: the training provider’s accreditation and CID’s approval of the credit are what make the hours countable, and the six-month application clock is the wrong moment to discover a documentation gap.
The examination: the published rules
Examinations for journeyman certification are administered by CID or its designee, under 14.6.4.8C(2) NMAC — the provision that carries this tier’s examination law, and a short provision with dense content. It states the pass standard in the rule’s own form: a passing score is 75% or higher. It states the retake cap in the same breath: an applicant who fails may retake, but not more than twice in any 30-day period. And the cheating rule, at 14.6.4.8C(2)(e), states the consequences of a CID determination of cheating in full: the examination is voided, all fees are forfeited, any license or certificate issued on that examination is automatically voided, and the applicant is barred from any CID examination for one year. The bar runs to every CID examination, not merely to a retake of this one — a breadth candidates should register before, not after, a sitting.
Two disciplines govern how this guide presents those rules. First, the 75% figure is New Mexico’s own: the lane’s standing instruction is that New Mexico’s standard is 75%, not the 70% figure common elsewhere, and no other state’s pass form is used in this package. Second, the contractor tier’s examination-administration detail — the scheduling and sitting mechanics printed in the contractor examination bulletin — is recorded in the sources as contractor-layer material. It is not restated here as JG administration law, because the sources do not state it for the JG examination; candidates follow the instructions issued with their own examination scheduling.
The examination: the fenced core, stated plainly
Against those published rules stands a set of mechanics that no primary source in the lane publishes for the JG examination: question count, duration in minutes, reference list, book policy, content outline, and pretest count are not in the sources for the JG examination and are stated nowhere in this guide. The honest presentation is to name that boundary rather than paper over it, and three consequences follow for candidates. Do not pace preparation by a borrowed count: the contractor examinations above this tier publish their own counts and durations, and those figures describe different examinations for a different credential — a qualifying party’s trade paper is not the journeyman’s sitting, and no figure from it appears in this package. Do not rely on a JG reference list from any secondary source: none is published in the sources behind this guide, so a list presented as the JG’s official list is not grounded in them. Prepare by depth instead of by outline: with no published content weights, preparation is organised around the natural gas fitting craft itself and the New Mexico rule layer — which is how the study plan below is built. When CID or its designee issues the candidate’s own examination instructions, those instructions govern the sitting; this guide’s silence is about what may be claimed in advance, and it is maintained precisely so that nothing here contradicts them.
Fees in full: the rule layer and nothing else
The journeyman fee schedule sits at 14.5.5.9B NMAC, and it is brief. The mechanical journeyman examination fee is $25. The journeyman renewal fee is $25 per year per classification held. Both figures are stated here exactly as the rule states them, and two common corruptions are avoided on purpose. The renewal fee is not multiplied into a lump sum for the three-year term: the rule prices renewal per year per classification, the sources publish no single term figure, and an invented total would misstate the instrument. And no contractor-tier figure is admitted into this schedule: the contractor examinations carry their own vendor-charged fees, contractor licenses carry their own application and per-classification fees, and a contractor surety bond exists at that tier — none of those instruments is a JG fee or a JG obligation in the sources, and none is printed in this guide as one. One authority is recorded for completeness: CID may raise examination fees by a commission-approved multiplier of up to three under 14.5.5.9D, so the $25 examination figure is the rule amount as published, subject to that standing authority — noted as authority, never blended into a composited fee. A secondary composite figure sometimes circulated for contractor applications is likewise not a rule fee and has no JG application in any case.
The field code, and why the tested layer stays unstated
New Mexico’s mechanical field code is a Uniform Mechanical Code adoption: the current 14.9.2 NMAC is the 2021 New Mexico Mechanical Code, adopting the 2021 UMC as amended by CID, effective March 10, 2022, and the earlier either-code transition window closed in September 2022. The field position is therefore settled: the JG holder’s work is performed under the 2021 UMC as New Mexico amends and enforces it, and preparation for this program is grounded in that code as field law — its structure, its mechanical provisions, and its application to the piping and appliance work a natural gas fitter performs under the licenses named in this guide. Candidates should also know the two traps at this layer. A citation of the field rule to an earlier edition still circulates in contractor-tier material and is stale — the current rule is the 2021 code. And a draft rule proposing a 2024 New Mexico Mechanical Code exists at the Department but has not been adopted; it is neither field code nor examination code, and this guide keys nothing to it.
The tested layer for the JG is then stated with the same precision: because the JG reference list is unpublished in the sources, no tested edition is claimed for the JG examination itself. The field code’s 2021 UMC is the code the work is performed under; what this guide will not do is silently transfer the contractor examinations’ keying — where field code and examination key are recorded as agreeing — down to the JG sitting. International Mechanical Code material, finally, is not New Mexico material at either layer of this program: New Mexico is a Uniform Mechanical Code state in the sourced record, and material keyed to a different code family does not transfer into this certificate’s preparation.
Holding the certificate: term, continuing education, renewal
The certificate term is three years, expiring the last day of the issue month, under CID’s journeyman renewal instructions administered by its designee. Renewal then turns on education in a way the contractor tier’s does not. The rule at 14.6.4.8G(2) is categorical: no journeyman certificate may be renewed without proof of continuing-education compliance. The requirement itself, at 14.6.4.8H(1): before renewal or reinstatement, the holder must complete a minimum of 16 hours of approved coursework, of which a minimum of 8 hours must cover the current CID code enforced for the classification being renewed. Read the split as design, not decoration: at least half of every renewal cycle’s education is code education, keyed to the code currently enforced for the JG’s own classification — which, at the field layer, is the 2021 New Mexico Mechanical Code. The other half is approved coursework within the approval rules. The boundary against the contractor tier is verified in the sources and worth stating once: contractor licenses and qualifying-party certificates carry no continuing-education requirement in their current rule text. The 16 hours are a journeyman-certificate duty; they do not float upward, and the contractor tier’s position does not float down.
At the family’s edge sits one further pathway, stated exactly as the rule states it. The JW welder certificate requires a JP, JG, JPG, JPF or JSM certificate together with ASME Section IX certification, and JW requires no separate test — 14.6.4.8F(8) NMAC. A JG holder therefore holds one of the qualifying certificates for that pathway. The point is recorded as a boundary only: ASME Section IX is the welder credential’s own requirement, not a JG examination component, and holding the JG alone does not confer the welder certificate.
A study plan built for a fenced outline
With no published content outline, the plan is built from the credential’s structure instead. First, the craft core: natural gas piping systems traced end to end without notes — supply, sizing reasoning, materials and joining, testing and inspection habits, and the safety discipline that governs every stage of gas work, because a fitter’s errors are the kind a household lives with. Second, the field code as working law: the 2021 Uniform Mechanical Code in its New Mexico form, navigated by structure rather than memorised by page, read as the rules of the jobs the JG holder actually performs under the MM-2 and MM-98 licenses. Third, the New Mexico rule layer as its own subject: the classification and supervision provisions, the two-year gate and half-credit arithmetic, the ten-year window, the six-month application clock, the 75% standard in its rule form, the twice-in-30-days retake cap, the cheating consequences, the $25 rule fees, and the 16-hour code-weighted renewal requirement — the facts generic material is most likely to misstate are concentrated here. Fourth, mixed timed practice across craft and rule layer together, paced by the candidate’s own timing discipline rather than by any borrowed sitting length. Fifth, the name check: before the sitting, re-read the certificate’s framework whole — natural gas fitter, under MM-2 or MM-98, inside its classification — because situational items in this trade habitually test whether the candidate knows which credential, which license, and which code a described job actually involves.
The errors this certificate is built to catch
Widening the name. Treating a shortened label as a broader fuel credential misreads the certificate at its first word; the rules name a natural gas fitter, and preparation and practice both stay inside that name. Importing the contractor tier. Borrowed counts, durations, fees, or a borrowed absence of continuing education all fail the same way: they describe a different credential, held differently, examined differently. Softening the standard. A passing score is 75% or higher — the rule’s sentence, in the rule’s form; a 70% habit carried from another state misjudges the sitting. Misreading the training credit — counting training hour-for-hour, or past the half cap — overstates eligibility and can strand an application inside its six-month clock. Letting the window close: experience outside the last 10 years does not count, however senior the fitter. Merging the neighbours: the JPG is a separate, combined certificate, and folding its identity into the JG confuses two instruments the rules keep apart. Assuming a ratio: the apprentice rule is direct supervision by a certified journeyman inside a licensed frame, and any numeric ratio quoted for New Mexico mechanical work is unverified in the current rules. Each error is a name, layer, or ladder error, and the certificate’s design — individual, supervised, classification-bound — exists to catch them.
After the sitting: the certificate and its clock
A pass completes the examination step; the certificate issues when every requirement — experience inside the window, the examination at 75% or higher — stands met inside the application’s six-month life. The certificate then runs its three years to the last day of its issue month, and the working duties run beneath the cycle: work inside the natural gas fitting classification, under the named licenses, supervising apprentices directly when they are placed under the holder, and accumulating the 16 code-weighted hours that renewal will audit. The JG rewards the fitter who treats its name as the job description it is: certified personally for natural gas work, supervised structurally, and current by rule.
Frequently asked questions
Where is the JG’s passing score stated?
In the journeyman certification rule itself: 14.6.4.8C(2) NMAC provides that a passing score is 75% or higher. It is a rule-stated standard, stated in that form, and it is New Mexico’s own — not the 70% figure used for many other states’ journeyman examinations.
How does the training credit actually work?
Accredited technical training, where approved, counts in lieu of work experience at one-half year of experience per year of training, and the credit can never exceed one-half of the two-year requirement. Two years of training therefore earns the maximum credit — one year — and at least one year (2,000 hours) of worked experience inside the ten-year window is always required.
Why does this guide not state the JG examination’s question count or time limit?
Because no primary source publishes them for the JG examination. The fact base records the count, duration, reference list, book policy, content outline, and pretest count as not in sources for this examination. Figures published for the contractor examinations describe that tier’s different examinations and are not used here.
Is there a NASCLA route around the JG examination?
No source states one for the journeyman examination. A waiver connected to the NASCLA accredited examination exists at the contractor qualifying-party layer, for that tier’s trade examination only; nothing transfers it to the JG.
What does cheating cost under the JG rules?
Everything attached to the sitting: the examination is voided, all fees are forfeited, any certificate issued on the examination is automatically voided, and the applicant is barred from any CID examination for one year — 14.6.4.8C(2)(e) NMAC.
Must a JG holder complete continuing education if the contractor above them need not?
Yes. The 16-hour requirement — at least 8 hours on the current CID code enforced for the classification — binds journeyman certificates, and no certificate may be renewed without proof of compliance. The contractor tier’s lack of a continuing-education requirement in its rules does not extend to this tier.
How is the renewal fee structured?
$25 per year per classification held, as the rule at 14.5.5.9B NMAC states it. The sources publish no single lump-sum figure for the three-year term, and this guide does not manufacture one by multiplication.
Which code should field preparation be grounded in?
The 2021 Uniform Mechanical Code as adopted and amended by the 2021 New Mexico Mechanical Code at 14.9.2 NMAC — New Mexico’s field mechanical code. No tested edition is claimed for the JG examination itself, because its reference list is unpublished in the sources.
Can a JG holder take a gas fitting contract directly from a customer?
No. The JG is an individual journeyman certificate; contracting runs through the contractor licenses, held by businesses through qualifying parties. The JG holder works under an MM-2 or MM-98 license.
Is PassProfessor affiliated with CID?
No. PassProfessor is an independent preparation provider, not affiliated with the Construction Industries Division or the Regulation and Licensing Department. CID alone certifies journeymen.
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