Download WA(Washington State amendments) Master Electrician 07Nonresidential Maintenanceination and more Exams Electrical Engineering in PDF only on Docsity!
WA( Washington State amendments) Master
Electrician 07Nonresidential
Maintenanceination (OLD VERSION) 2025 -
2026 UP-TO-DATE EXAM QUESTIONS AND
100% ACCURATE SOLUTIONS | Question
And VERIFIED ANSWERS - INSTANT PDF
DOWNLOAD.
1. According to WAC 296-46B-920, a holder of a Washington State "07" electrical license is authorized to perform which of the following activities? A) Install new service entrance conductors for a building expansion B) Perform routine maintenance and like-in-kind replacement on existing wiring C) Design the electrical system for a new commercial building D) Install a new fire alarm system Correct Answer: B Explanation: The "07" Nonresidential Maintenance license is strictly limited to maintenance, repair, and replacement of existing electrical equipment and conductors. It does not permit new installations or design work. 2. Under WAC 296-46B-920(h), an 07A electrician is asked to replace a fluorescent fixture with an LED retrofit kit. The new kit requires a remote driver mounted outside the fixture housing. Is this permitted? A) Yes, if the driver is listed for the fixture B) No, because work outside the luminaire body is not allowed for 07A C) Yes, with an electrical permit D) No, unless a master electrician supervises Correct Answer: B Explanation: The 07A Nonresidential Lighting Maintenance scope is limited to the inside of the luminaire body. Adding a junction box or mounting a driver outside the fixture constitutes new work or modification beyond the scope of the specialty license.
3. Under RCW 19.28, who is ultimately responsible for ensuring that a non- residential electrical maintenance contractor complies with Washington State electrical safety standards? A) The property owner B) The designated 07 administrator C) The lead journeyman on site D) The local L&I inspector Correct Answer: B Explanation: RCW 19.28 and RCW 19.215.190 designate the electrical contractor's administrator (who holds a master electrician certificate) as the legal party responsible for compliance. 4. When is a permit required for electrical maintenance work in Washington State? A) Only for new construction projects B) Whenever a circuit is disconnected for more than 24 hours C) When the work involves replacing a breaker with a different ampere rating D) Never, permits are not required for like-in-kind maintenance Correct Answer: C Explanation: Changing the overcurrent protection rating (e.g., 15A to 20A) alters the circuit characteristics and generally requires a permit. Like-in-kind replacement (same size/brand) often does not, but changing rating does . 5. Under WAC 296-46B-110, where must an electrical permit be posted on a demolition or construction site? A) Inside the main electrical panel door B) On the inside of the building's main entrance door C) On a temporary fence or structure where it is readily visible to inspectors D) In the contractor's vehicle Correct Answer: C Explanation: WAC 296-46B-110 requires the permit to be posted where it can be readily seen by the Washington Department of Labor & Industries (L&I) inspector, typically at the job site entrance or temporary fence . 6. A person who performs electrical work without a valid certificate in Washington may be subject to a civil penalty of up to: A) $1,000 per day B) $5,000 per violation C) $10,000 per violation D) $25,000 per violation Correct Answer: C
same type, voltage, and current rating, without altering the wiring system or adding new loads.
11. Which Washington Administrative Code (WAC) section is colloquially known as the "Blue Book" and contains the state amendments to the NEC? A) WAC 296-46B B) WAC 296- 150 C) WAC 19. D) WAC 173- 200 Correct Answer: A Explanation: WAC 296-46B is the Washington Administrative Code section that adopts and amends the National Electrical Code, often referred to as the "Blue Book" by local electricians . 12. A 07 electrician is asked to replace a broken lighting contactor with an identical model. The power wires are the same size. Is a permit required? A) Yes, because it involves a disconnecting means B) No, because it is like-in-kind maintenance C) Yes, if the voltage is over 250V D) No, only if it is located in a hazardous location Correct Answer: B Explanation: Like-in-kind replacement of existing equipment (swapping a broken contactor for an exact match) generally falls under the maintenance exemption for permits, provided no new wiring is run and the rating doesn't change. 13. What is the renewal cycle for a Washington State electrical license? A) Every 1 year B) Every 2 years C) Every 3 years D) Every 5 years Correct Answer: B Explanation: Washington requires electrical licenses to be renewed biennially (every 2 years). 14. Under WAC 296-46B-920, a 07 Nonresidential Maintenance electrician may NOT: A) Replace a defective motor starter with an identical model B) Repair a damaged grounding electrode conductor C) Install new conduit in an area that previously had no electrical service D) Replace a broken lighting contactor Correct Answer: C
Explanation: The 07 scope is limited to existing installations. Installing new conduit where none existed ("new work") requires a General Journeyman (01) license.
15. What is the fee required for the Washington State electrician examination application? A) $52. B) $82. C) $120. D) $250. Correct Answer: B Explanation: The official L&I form F626- 001 - 000 lists the examination fee as $82. (subject to change, but historically accurate for the "old version" period) . 16. The designated administrator of an electrical contracting firm must hold which credential? A) Journeyman certificate B) Master electrician certificate or administrator's certificate C) Electrical trainee card D) General contractor's license Correct Answer: B Explanation: RCW 19.28 requires that the designated administrator hold a master electrician certificate or an administrator's certificate to legally supervise electrical work and ensure compliance. 17. Under RCW 19.28, which classification is limited to maintenance, repair, and replacement of like-in-kind existing equipment on industrial or commercial premises? A) 01 General Journey Level B) 07 Nonresidential Maintenance C) 02 Residential D) 07A Nonresidential Lighting Maintenance Correct Answer: B Explanation: This is the statutory definition of the 07 Nonresidential Maintenance license. 18. A maintenance electrician needs to move a junction box 8 feet to the left because a new water heater is being installed in its old location. Is this allowed under the 07 scope? A) Yes, as long as the wire lengths are extended B) Yes, if the work is inspected within 24 hours C) No, moving the box constitutes new work or alteration of the existing system D) No, only a plumber can move the box
22. What is the minimum working space depth required in front of a 400-amp panelboard operating at 120/208V? A) 2 feet B) 3 feet C) 3.5 feet D) 4 feet Correct Answer: B Explanation: NEC Table 110.26(A)(1) requires a minimum working space depth of 3 feet (36 inches) for equipment 0-150V to ground, and 3 feet for 151-600V unless there are exposed live parts on both sides, which then requires 4 feet. For a standard 208V panel, 3 feet is the minimum . 23. A junction box in a commercial building has fallen from its support. The 07 electrician may: A) Install a new support and re-secure the existing box in the same location B) Replace the box with a new one in a different location without a permit C) Only replace the box with like-in-kind if moved less than 6 feet D) Remove the box and abandon the wires in the wall Correct Answer: A Explanation: Re-securing an existing box to its support is maintenance (repair) of the existing installation. Relocating it or leaving it abandoned would violate code. 24. Equipment that is "accessible" (but not necessarily "readily accessible") implies: A) It can be reached quickly without tools B) It is not guarded by locked doors or elevation C) It involves shutting down equipment to reach it D) It is in a public corridor Correct Answer: C Explanation: "Accessible" (as defined in Article 100) means it can be reached for operation, repair, or inspection, but it might require the use of a ladder, portable steps, or shutting down machinery to access it safely. 25. What is the minimum headroom clearance for a service equipment room working space? A) 6 ft 0 in. B) 6 ft 6 in. C) 7 ft 0 in. D) 8 ft 0 in. Correct Answer: B
Explanation: NEC 110.26(E) requires the working space height to be clear and 6 ft 6 in. or the height of the equipment, whichever is greater.
26. Illumination is required for working spaces around service equipment. How is it controlled? A) Only by a switch at the panel location B) By automatic motion sensors only C) By wall switches located at the principal entrance to the area D) It does not require switching; it must be on 24/ Correct Answer: C Explanation: NEC 110.26(D) requires illumination for working spaces. The switches must be located at the principal entrance to the area (so you can turn lights on before walking into a dark room with live gear). 27. Damp or wet location luminaires must be installed so that water: A) Is completely sealed out via gaskets B) Cannot enter or accumulate in wiring compartments C) Flows through the fixture to cool the LEDs D) Triggers a GFCI trip Correct Answer: B Explanation: NEC 410.10 requires luminaires installed in wet or damp locations to be installed such that water cannot enter or accumulate in wiring compartments, lampionders, or other electrical parts. 28. Non-metallic cable (NM) is generally prohibited in commercial buildings over how many stories? A) 1 B) 2 C) 3 D) 4 Correct Answer: C Explanation: NEC 334.10 restricts NM cable (Romex) to buildings not exceeding three stories above grade. For commercial buildings taller than that, NM is generally not permitted unless embedded in non-combustible finish. 29. Working space around electrical equipment (600V or less) must be clear and extend from the equipment to the: A) Nearest wall B) Ceiling C) Floor D) Door
33. What is the maximum number of 12 AWG THHN conductors permitted in a 1/2-inch EMT conduit per NEC Chapter 9 Table 1? A) 6 B) 9 C) 12 D) 15 Correct Answer: B Explanation: NEC Chapter 9, Table 1, combined with Table 5 (area of conductors) and Table 4 (area of conduit) shows that 1/2-inch EMT can hold up to 9 #12 THHN conductors (40% fill for over 2 conductors) . 34. A 120-volt branch circuit supplies lighting in a commercial office. The load is continuous (12 amps). What is the minimum branch circuit rating per NEC? A) 12 amps B) 15 amps C) 20 amps D) 30 amps Correct Answer: B Explanation: NEC 210.19(A)(1) and 210.20(A) require branch circuits for continuous loads to be sized at 125% of the continuous load. 12A x 1.25 = 15A. A 15A circuit is the minimum . 35. An electrician is replacing a 15A breaker with a 20A breaker on a circuit with 12 AWG wire to stop nuisance tripping. Is this code compliant? A) Yes, because 12 AWG is rated for 20A B) No, unless the load is non-continuous C) No, unless the entire circuit is verified to have 20A-rated components D) Yes, if the breaker is arc-fault Correct Answer: C Explanation: NEC 240.4(D) limits 12 AWG to 20A overcurrent protection; however, simply upsizing the breaker may overload devices (receptacles, switches) on the circuit that are only rated for 15A pass-through. The whole circuit must be rated for 20A . 36. What is the ampacity of 6 AWG THHN copper wire at 75°C terminals in a dry location? A) 55 amps B) 65 amps C) 75 amps D) 85 amps Correct Answer: B Explanation: NEC Table 310.15(B)(16) lists 6 AWG THHN copper as having an ampacity of
75A at 90°C (for derating purposes), but when terminating on 75°C rated terminals (common for breakers), you must use the 75°C column, which is 65A.
37. Which cable type is permitted for exposed work in a commercial building? A) NM-B (Romex) B) MC Cable (Metal Clad) C) UF-B (Underground Feeder) D) SEU (Service Entrance) Correct Answer: B Explanation: NEC 330.10 permits MC cable for exposed or concealed work in commercial buildings. NM-B is restricted to residential and buildings under 3 stories . 38. EMT (Electrical Metallic Tubing) supports must be installed within how many feet of a junction box? A) 2 ft B) 3 ft C) 4 ft D) 5 ft Correct Answer: B Explanation: NEC 358.30(A) requires EMT to be securely fastened within 3 feet (900 mm) of every outlet box, junction box, device box, cabinet, or conduit body. 39. A 1-inch RMC (Rigid Metal Conduit) nipple is 24 inches long connecting two panels. How many current-carrying conductors can it contain before derating applies? A) 0 B) 10 C) 20 D) 30 Correct Answer: D Explanation: NEC 310.15(C)(1) provides an exception for nipples not exceeding 24 inches. If the fill does not exceed 30% of the cross-sectional area, derating is not required regardless of the number of conductors. 40. When conductors are run in parallel, what is the minimum size conductor permitted for parallel installation? A) 1 AWG B) 1/0 AWG C) 2 AWG D) 3/0 AWG Correct Answer: B
44. What is the standard ampere rating for a fuse that does not exist, allowing you to round up per 240.4(B)? A) 15A B) 20A C) 30A D) 35A Correct Answer: D Explanation: Standard sizes are listed in NEC 240.6(A). 35A is NOT a standard size. If a calculated load is 34A, you can use a 35A breaker only if 35A is the next standard size and the conductor ampacity is at least 34A. 45. Where can you NOT locate an overcurrent device? A) In a bathroom B) In a closet C) In a garage D) In the vicinity of easily ignitable material Correct Answer: D Explanation: NEC 240.24(D) prohibits overcurrent devices from being located in the vicinity of easily ignitable material (e.g., spray booths, clothes closets, chemical storage). 46. You have a continuous lighting load of 24 amps on a 120V circuit. What is the minimum required rating of the overcurrent device? A) 20A B) 25A C) 30A D) 35A Correct Answer: C Explanation: 24A x 125% = 30A. NEC 210.20(A) requires the branch circuit overcurrent device to be sized at 125% of the continuous load . 47. A feeder supplies a continuous load of 80A and a non-continuous load of 20A. The feeder overcurrent device rating must be at least: A) 100A B) 110A C) 120A D) 125A Correct Answer: C Explanation: (80A x 1.25) + 20A = 100A + 20A = 120A. You cannot use the 100A breaker; you must use a 120A (or next standard size up if allowed, but 120A is standard for this calculation).
48. A 20-amp, 120-volt branch circuit is run to a commercial kitchen. It feeds a garbage disposal. What is the maximum load permitted on this circuit if the disposal runs for more than 3 hours? A) 12A B) 16A C) 20A D) 24A Correct Answer: B Explanation: For a continuous load, the circuit must be derated to 80%. 20A x 0.80 = 16A. 49. The inside of a panelboard is labeled "Suitable for use as service equipment only". This means: A) It has a green screw installed for bonding the neutral B) It cannot be used as a sub-panel C) It has a main breaker handle tie D) It is rated for 100% duty cycle Correct Answer: A Explanation: "Suitable only for use as service equipment" indicates that the neutral bar is bonded to the enclosure (by a green screw or metal strap). It cannot be used as a sub- panel because the neutral cannot be bonded downstream. 50. When using the "next size up" rule for overcurrent protection (240.4(B)), the conductor ampacity must be: A) Equal to the standard size breaker used B) At least the non-continuous load plus 100% of the continuous load C) At least 125% of the continuous load plus 100% of the non-continuous load D) Not less than the rating of the next size up breaker Correct Answer: C Explanation: The "next size up" rule is permissive only if the conductor ampacity is sufficient for the calculated load (continuous x 1.25 + non-continuous). You cannot use it to protect an undersized wire.
Topic 5: Grounding and Bonding (NEC 250)
Core Focus: Path to fault, clear faults, electrode types.
the sub-panel. Bonding the neutral downstream allows parallel return paths for neutral current, which is dangerous.*
55. A grounding rod (ground electrode) driven into the earth must be at least how long? A) 4 ft B) 6 ft C) 8 ft D) 10 ft Correct Answer: C Explanation: NEC 250.52(A)(5) requires rod-type electrodes to be at least 8 ft in length. 56. What is the maximum resistance required for a single ground rod to be acceptable as a grounding electrode? A) 5 ohms B) 10 ohms C) 25 ohms D) 50 ohms Correct Answer: C Explanation: NEC 250.53(A)(2) allows a single rod if it has a resistance to ground of 25 ohms or less. If it is higher, a second rod is required. 57. Which of the following is NOT permitted to serve as a grounding electrode? A) Metal underground water pipe (10 ft or more) B) Concrete-encased electrode (UFER) C) Gas line piping D) Building steel Correct Answer: C Explanation: NEC 250.52(B)(1) specifically prohibits the use of gas piping as a grounding electrode due to explosion/fire risk. 58. The main bonding jumper is located: A) In every junction box B) At the service panel, connecting the neutral bus to the panel enclosure C) At the meter socket D) On the load side of the overcurrent device Correct Answer: B Explanation: The main bonding jumper is located at the service equipment (first disconnect) and connects the neutral (grounded) conductor to the equipment grounding system (the panel enclosure).
59. If you cut a metal conduit that is used as an equipment grounding conductor, how do you maintain ground continuity? A) You don't; the conduit is not a ground B) Use a bonding jumper around the break C) Paint the conduit to prevent rust D) Wrap it with electrical tape Correct Answer: B Explanation: NEC 250.96 requires that electrical continuity be ensured. If you cut a section of metal conduit (e.g., installing a service tee), you must install a bonding jumper to bypass the break. 60. A 20A circuit is run in PVC conduit. The EGC inside the conduit is cut and not connected at a junction box. What is the hazard? A) Nuisance tripping of AFCI B) No fault path back to the source; metal parts may become energized and not trip the breaker C) The voltage will increase D) The pipe will melt Correct Answer: B Explanation: Without a continuous EGC, if a hot wire touches the metal box, the box becomes energized with no low-impedance path to the breaker. It will not trip, creating a severe shock hazard.
Topic 6: Motors and Motor Controls (NEC 430)
Core Focus: Disconnects, overloads, sizing for maintenance.
61. A motor disconnecting means must be located within sight from the motor. Within sight means: A) Within 50 feet B) Within 100 feet C) Visible and not more than 50 feet away D) In the same room, regardless of distance Correct Answer: C Explanation: NEC 430.102(B) and Article 100 define "within sight" as visible and not more than 50 ft (15 m) apart.
C) Properly operating overload heaters D) Oversized branch-circuit conductors Correct Answer: B Explanation: "Chattering" usually occurs when the contactor coil cannot maintain adequate magnetic force because of undervoltage, loose control wiring, or coil deterioration.
66. Where a motor and the driven machinery are not in sight of the controller location, the installation is required to have: A) A light beam safety device B) A disconnect that can be locked in the open position at the motor location C) An oversized controller D) A dedicated 20A circuit Correct Answer: B Explanation: NEC 430.102(B) requires a disconnecting means at the motor location if the controller is out of sight. It must be capable of being locked in the open position. 67. The branch-circuit short-circuit protection for a motor (fuses or breaker) is sized to allow: A) Running overload protection B) The motor to start without nuisance opening (inrush current) C) The motor to run at 200% load continuously D) Protection against phase loss Correct Answer: B Explanation: Motors draw high inrush current (LRA) when starting. The short-circuit protection device (fuse/breaker) is sized high enough (up to 300% for non-time delay fuses) to hold during starting but still trip on a locked rotor fault. 68. Thermal overload relays (heaters) for motors should be sized at no more than what percentage of the motor nameplate full-load amperage (with a service factor of 1.0)? A) 100% B) 115% C) 125% D) 140% Correct Answer: B Explanation: NEC 430.32(A)(1) specifies that overload devices for motors with a marked temperature rise or service factor of 1.0 must be set at no more than 115% of the nameplate FLC.
69. What is a "controller" as defined for a motor? A) The wire connecting the motor to the panel B) The overload heater C) The starter or contactor that starts and stops the motor D) The push button station only Correct Answer: C Explanation: NEC Article 100 defines a controller as a device or group of devices that governs the electric power delivered to the motor. 70. A motor feeder conductor supplying a single motor must have an ampacity of at least: A) 100% of the motor nameplate rating B) 100% of the motor full-load current (Table value) C) 125% of the motor full-load current (Table value) D) 150% of the locked rotor current Correct Answer: C Explanation: NEC 430.22 requires that motor branch circuit conductors have an ampacity of not less than 125% of the motor's full-load current as listed in Tables 430.247 through 430.250.
Topic 7: Electrical Safety (WISHA/OSHA, LOTO, PPE)
Core Focus: Safe work practices, arc flash.
71. A non-contact voltage tester indicates a lighting fixture is de-energized. What is the safest next step before touching any wires? A) Begin replacing the ballast immediately B) Test the tester on a known live circuit, then re-test the fixture C) Assume it is safe and proceed D) Notify the building owner Correct Answer: B Explanation: You must always verify the tester's functionality on a known live source before trusting a "dead" reading. A dead battery or damaged tester could provide a false negative. 72. According to NFPA 70E, the "Arc Flash Boundary" is the distance at which a person could receive a: A) 1.2 cal/cm² second-degree burn
