NJ Registered Journeyman Electrician flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Ohm's law

Current equals voltage divided by resistance (I = E/R). Rearranged, E = I × R and R = E/I. Used to solve branch currents, voltage drops, and resistor values in circuit analysis.

Three-phase power formula

For a balanced three-phase load, P = √3 × E(line) × I(line) × power factor. Line voltage and line current are used regardless of wye or delta connection.

Voltage drop formula

Single-phase VD = 2 × K × I × L / CM. K is approximately 12.9 for copper and 21.2 for aluminum; L is one-way length in feet and CM is circular mils.

Box fill calculation

Count conductors, devices, and grounding conductors per NEC Table 314.16(B). Each device yoke counts as two conductors; compare total volume to the box's listed cubic-inch capacity.

Dwelling general lighting load

NEC Table 220.12 requires 3 VA per square foot for dwelling general lighting. Small-appliance and laundry branch circuits each add 1,500 VA before demand factors apply.

Motor overload protection

NEC 430.32 sizes overload protection based on motor nameplate current, while branch-circuit short-circuit protection uses Table 430.52 and conductors use 125% of Table 430.250 FLC.

Termination temperature limitation

NEC 110.14(C) limits conductor ampacity to the temperature rating of terminations. Conductors rated 90°C may be derated but final ampacity is capped by the termination rating.

Demand factor

A ratio applied to connected load to reduce the calculated load based on expected diversity. NEC Table 220.42 provides demand factors for dwelling lighting and appliance loads.

New Jersey Uniform Construction Code

N.J.A.C. 5:23 adopts the NEC as the electrical subcode. Enforcement is by the local construction official and electrical subcode official, not the licensing board.

Authority having jurisdiction

The organization or individual responsible for approving equipment and enforcement. In New Jersey this is the municipal or county construction office administering the UCC.

NEC Article 90 scope

Article 90 states the Code's purpose and scope and grants the AHJ interpretive authority under 90.4. Informational notes in the Code are explanatory and not enforceable requirements.

GFCI requirements

NEC 210.8 requires ground-fault circuit-interrupter protection for dwelling bathroom, kitchen, laundry, garage, outdoor, and unfinished-basement receptacles, plus other specified locations.

AFCI requirements

NEC 210.12 requires arc-fault circuit-interrupter protection for most 120-volt branch circuits in dwelling units, including bedrooms, living areas, and similar rooms.

Grounding electrode conductor sizing

NEC Table 250.66 sizes the grounding electrode conductor based on the largest service-entrance conductor. Equipment grounding conductors are sized per Table 250.122 using the overcurrent device rating.

Conductor ampacity table

NEC Table 310.16 lists allowable ampacities for not more than three current-carrying conductors at 30°C ambient. Ambient correction and conductor adjustment apply before final sizing.

Raceway fill tables

NEC Chapter 9 Table 1 limits conduit fill to 53% for one conductor, 31% for two, and 40% for three or more. Annex C gives precalculated fill for common conductor types.

NM-B cable restrictions

Nonmetallic-sheathed cable is permitted in dwellings but prohibited in wet locations, masonry block, and where subject to physical damage. It must be secured within 12 inches of boxes.

EMT support spacing

Electrical metallic tubing must be supported within 3 feet of each box and at intervals not exceeding 10 feet, per NEC 358.30, unless listed supports allow otherwise.

Working clearance

NEC 110.26 requires a working space 30 inches wide, 36 inches deep, and 6 feet 6 inches high in front of electrical equipment, increasing with higher voltages.

Receptacle spacing rule

In dwelling units, no point along the floor line may be more than 6 feet from a receptacle. Kitchen counter receptacles must be spaced so no point exceeds 24 inches.

Splice accessibility

Splices and joints must be made in listed boxes or fittings and must remain accessible. Junction boxes may not be buried in walls or ceilings without access.

Bonding metal water piping

NEC 250.104 requires bonding of metal water piping systems. A bonding jumper must bypass water meters and insulating joints to ensure a continuous path.

Construction site GFCI

NEC 590.6 requires GFCI protection for temporary receptacles and portable tools on construction sites, or an assured equipment grounding conductor program with recorded tests.

MC cable support

Metal-clad cable must be supported every 6 feet and within 12 inches of boxes. In wet locations, the jacket and fittings must be corrosion-resistant and listed for the location.

PVC conduit support

Rigid PVC conduit Schedule 40 must be supported at intervals not exceeding 3 feet, per NEC 352.30, with closer spacing where the conduit is exposed to temperature change.

Electrical Contractors Licensing Act

N.J.S.A. 45:5A, the Electrical Contractors Licensing Act of 1962, created the Board of Examiners of Electrical Contractors and requires licensure to perform electrical contracting.

Electrical Contractor license

Only a licensed Electrical Contractor may bid, contract, or advertise electrical work in New Jersey. The business must have a qualified licensee responsible for supervision.

Qualified Journeyman license

A journeyman license allows the holder to perform electrical work under the supervision of a licensed electrical contractor. Applicants must meet Board experience and exam requirements.

Board disciplinary authority

The Board may refuse, suspend, or revoke a license for fraud, gross negligence, incompetence, or violations of the Act, and may impose civil penalties.

Apprentice registration

Apprentices must be registered with the Board and work under direct supervision. Documented apprentice hours count toward the experience required for journeyman licensure.

License renewal and CE

New Jersey electrical licenses require periodic renewal and continuing education as set by the Board. Lapsed licenses may not be used until reinstated under Board rules.

Unlicensed contracting penalty

Performing electrical contracting without a license violates N.J.S.A. 45:5A and subjects the offender to civil penalties and possible injunctive action by the Board.