MA Electrician study guide
MA Electrician · Work through your exam, one topic at a time.
An electrician license in Massachusetts is issued by the Board of State Examiners of Electricians, which credentials both journeyman and master electricians. The journeyman license is the working-level credential: it requires documented hours of supervised field experience plus a passing exam score. The MA Electrician study guide has 9 sections and about 2,870 words.
01General Code Requirements, Definitions, and Administration
Articles 90 and 100 set the ground rules. Article 90 states the NEC is not a design manual (90.1), explains the arrangement of the chapters (90.3: Chapters 5, 6 and 7 supplement or modify Chapters 1 through 4), and defines mandatory ('shall') versus permissive ('may') language (90.5).
300 words, about 2 min02Wiring Methods, Materials, and Installation Practices
Chapter 3 answers 'how is it installed': Article 300 (general), 310 (conductors), 314 (boxes), 320-340 (cables), 342-362 (raceways), 376-392 (wireways, busways, trays). Key rules a candidate must know: 300.4 requires protection from physical damage where cable or tubing is within 1 1/4 in.
332 words, about 2 min03Branch Circuits, Feeders, and Service Load Calculations
Article 210: 210.8(A) requires GFCI protection for essentially all 125-250 V receptacles in dwelling kitchens, bathrooms, laundry areas, garages, basements, outdoors, and near sinks; 210.8(B) extends coverage to non-dwelling kitchens, bathrooms, rooftops, and outdoor outlets. 210.12 requires arc-fault protection for dwelling-unit branch circuits.
306 words, about 2 min04Grounding, Bonding, and Overcurrent Protection
Article 250 separates three conductors: the grounded (neutral) conductor, the grounding electrode conductor (GEC), and the equipment grounding conductor (EGC). At the service, the neutral is bonded to the electrode system (250.24); downstream, neutral and EGC must be separated (250.24(A)(5), 250.142).
311 words, about 2 min05Electrical Theory and Fundamentals
V = I x R, P = V x I = I^2 x R = V^2 / R. In series, resistances add and current is common; in parallel, voltage is common and 1/Rt = 1/R1 + 1/R2.
345 words, about 2 min06Motors, Controls, and Utilization Equipment
Article 430 governs. Table 430.250 gives full-load current by horsepower and voltage; 430.6(A)(1) requires table values (not nameplate current) for sizing conductors and short-circuit protection, while nameplate current is used for overload protection (430.32).
291 words, about 1 min07Special Occupancies, Special Equipment, and Special Conditions
These chapters supplement or modify Chapters 1-4 and take precedence where they conflict. Hazardous locations (Articles 500-506) classify by Class I (flammable gases), Class II (combustible dust), and Class III (fibers), then by Division or Zone; wiring methods, sealing fittings, and equipment marking follow the classification.
335 words, about 2 min08Massachusetts Electrical Code Amendments, Statutes, and Board Regulations
Massachusetts adopts the NEC through 527 CMR 12.00, the Massachusetts Electrical Code, which reproduces the NEC with Commonwealth amendments. Where the amendment and the NEC text differ, the amendment controls, so a question that quotes the national rule may have a different answer in Massachusetts.
340 words, about 2 min09Jobsite Safety and Electrical Safe Work Practices
NFPA 70E and OSHA (1910 Subpart S, 1926 Subpart K) form the backbone. The central idea is the electrically safe work condition (70E Article 120): identify all sources, disconnect, visually verify the blades are open, lockout/tagout (1910.147), release stored energy, verify absence of voltage with a tester rated for the voltage and category, and apply temporary protective grounds where required.
310 words, about 2 min