NM Journeyman Electrician key terms

A device that compares current leaving a circuit with current returning and trips quickly when the difference indicates current is leaking to ground, protecting people from shock in bathrooms, kitchens, outdoors, and other wet locations.

A breaker or receptacle device that senses the signature electrical noise of a dangerous parallel or series arc and opens the circuit, reducing the chance that damaged wiring starts a fire.

The conductor that bonds non-current-carrying metal parts of equipment to the system grounding point, giving fault current a low-impedance path back to the source so overcurrent devices clear the fault.

The circuit conductor intentionally connected to ground at the service, commonly called the neutral, which carries return current during normal operation and is white or gray in color.

The conductor that connects the grounding electrode system, such as a ground rod or metal water pipe, to the service equipment or source, establishing the system's reference to earth.

A conductive object in direct contact with earth, such as a rod, plate, pipe, or concrete-encased electrode, used to connect the electrical system to the earth.

The screw, strap, or conductor in service equipment that intentionally connects the grounded conductor to the equipment grounding bus, making the neutral-to-ground connection at that single point only.

The permanent joining of metal parts to form an electrically conductive path that ensures electrical continuity and the capacity to safely carry any current likely to be imposed.

A reliable conductor sized to carry fault current that connects metal parts together, such as around a water meter or across a removable fitting, keeping the bonding path continuous.

A fuse or circuit breaker that automatically opens a circuit when current exceeds its rating for a set time, protecting conductors and equipment from overheating and fire.

The maximum current, in amperes, a conductor or device can carry continuously under stated conditions without exceeding its temperature rating and damaging insulation.

Reducing a conductor's allowable ampacity to account for conditions such as more than three current-carrying conductors in a raceway or high ambient temperature, using adjustment and correction factors.

The required depth, width, and height of clear space in front of electrical equipment that must remain unobstructed so a person can safely work on or escape from energized parts.

A sudden release of energy caused by an electrical arc through air, producing intense heat, light, pressure, and molten metal that can severely burn or injure workers near energized equipment.

A safety procedure in which an energy-isolating device is locked and tagged by each worker so equipment cannot be re-energized while someone is servicing it.

Protective clothing and gear such as insulated gloves, arc-rated clothing, face shields, and safety glasses worn to reduce injury from shock, arc flash, and burns.

A status meaning equipment has been accepted by the authority having jurisdiction, often through listing by a recognized testing laboratory, as suitable for a specific purpose.

Equipment that appears in a published list from a nationally recognized testing laboratory, showing it has been tested and found to meet a designated standard.

Equipment that has an attached label, symbol, or mark from a qualified testing organization indicating it complies with recognized standards for its intended use.

The organization or official responsible for enforcing the electrical code and approving equipment, installations, and permits, typically the local building or electrical inspector in New Mexico.

Written authorization from the enforcing agency to begin electrical work, allowing inspections to be scheduled and helping ensure installations are checked for code compliance.

The official review of electrical work at stages such as rough-in and final, where the inspector verifies code compliance before the work may be covered, energized, or occupied.

The inspection performed after boxes, raceways, and wiring are installed but before walls or ceilings are closed, allowing the inspector to see concealed work.

The last inspection, done when the project is complete, confirming devices, fixtures, grounding, and labeling are installed and the system is safe to energize.

The model electrical installation code published by NFPA and adopted with amendments by New Mexico, forming the technical basis for statewide electrical permitting and inspection.

A credential issued by the New Mexico Electrical Bureau allowing a person to perform electrical work under the scope defined by state law, after meeting experience, exam, and fee requirements.

The New Mexico state agency within the Regulation and Licensing Department that licenses electricians, administers examinations, adopts code rules, and enforces electrical licensing law.

Required coursework, including code-update hours, that a licensed electrician must complete each renewal cycle to keep a New Mexico license active.

The switch or breaker that disconnects all service conductors from the building's wiring, providing the means to de-energize the premises for maintenance or emergency.

The equipment, usually at the service entrance, that contains the main disconnect and overcurrent protection and is the point where the utility supply connects to the premises wiring.

An enclosed channel such as conduit or tubing designed to hold and protect conductors, allowing wiring to be pulled and replaced while shielding it from physical damage.

The calculated volume of an outlet, device, or junction box required to safely contain the conductors, devices, and fittings inside it without overcrowding or damaging insulation.

An enclosure where conductors are spliced or connected to devices, accessible for inspection and maintenance, and sized to hold the contained wiring safely.

An opening in the wiring system where a plug is inserted to supply utilization equipment, with the outlet required to be of the grounding type in most locations.

A receptacle with shutters that block foreign objects from being inserted into the slots, required in dwelling units to reduce shock injury to children.

The loss of voltage along conductors caused by their resistance and the current flowing through them, which can cause poor performance and is limited by code recommendations for feeders and branch circuits.