NASCLA Electrical Contractor / Master Electrician Practice Test

Answer choices

1. A. Combine them if the raceway is metallic
2. B. Combine the circuits if all conductors have 600-volt insulation
3. C. Route the emergency wiring separately as required by Article 700
4. D. Combine them if the normal circuit breaker is lockable

Wrong-answer review

• A. Combine them if the raceway is metallic: Incorrect. This option treats “Combine them if the raceway is metallic” as controlling, but the cited rule supports a different decision for the facts given. Emergency-system wiring generally must be kept entirely independent of other wiring except where Article 700 specifically permits otherwise.
• B. Combine the circuits if all conductors have 600-volt insulation: Incorrect. The value in this option (Combine the circuits if all conductors have 600-volt insulation) is below the result required by the stated calculation or threshold. Article 700 imposes separation requirements to protect emergency-system reliability; ordinary convenience is not an exception.
• D. Combine them if the normal circuit breaker is lockable: Incorrect. This option treats “Combine them if the normal circuit breaker is lockable” as controlling, but the cited rule supports a different decision for the facts given. Emergency-system wiring generally must be kept entirely independent of other wiring except where Article 700 specifically permits otherwise.

Answer choices

1. A. Maintain the required separation from electric light or power conductors, or use a specifically permitted raceway/barrier arrangement
2. B. Bundle the communications and power conductors together with cable ties
3. C. Allow contact if the communications cable is blue
4. D. Allow contact whenever both systems originate in the same room

Answer choices

1. A. 72 amperes
2. B. 90 amperes
3. C. 99 amperes
4. D. 81.9 amperes

Answer choices

1. A. 60 amperes.
2. B. 50 amperes.
3. C. 40 amperes.
4. D. 46 amperes.

Answer choices

1. A. A neutral-to-ground bond at each patient care receptacle
2. B. A separate grounding electrode driven for every receptacle
3. C. An insulated copper equipment grounding conductor installed with the branch-circuit conductors in addition to the qualifying metal grounding path
4. D. Removal of the equipment grounding conductor to avoid parallel paths

Answer choices

1. A. Proceed if a spotter stays within 10 feet
2. B. Proceed because the worker is not intentionally performing electrical work
3. C. Allow the work if the worker wears a hard hat
4. D. De-energize and ground the circuit or effectively guard it by insulation or other means before the worker enters the exposure

Answer choices

1. A. 25 amperes.
2. B. 30 amperes.
3. C. 15 amperes.
4. D. 20 amperes.

Answer choices

1. A. 44 days
2. B. 24 days
3. C. 4 days
4. D. 20 days

Answer choices

1. A. Load B draws about 75.2 A, roughly 15.1 A more than Load A.
2. B. Both loads draw about 60.1 A because real power is equal.
3. C. Load B draws about 48.1 A because lower power factor reduces line current.
4. D. Load A draws about 75.2 A and Load B draws about 60.1 A.

Answer choices

1. A. Route all conductors of the circuit through the same opening or otherwise use a permitted arrangement that avoids inductive heating in ferrous metal.
2. B. Keep the conductors separated to reduce magnetic coupling.
3. C. Install plastic bushings and leave the conductors in separate holes.
4. D. Increase the neutral conductor size only.