NASCLA Electrical Contractor / Master Electrician Practice Test

Answer choices

1. A. Combine them if the raceway is metallic, for the affected environment.
2. B. Combine the circuits if all conductors have 600-volt insulation, within the proposed design.
3. C. Route the emergency wiring separately as required by Article 700, when applied.
4. D. Combine them if the normal circuit breaker is lockable, as the organization’s selected response.

Wrong-answer review

• A. Combine them if the raceway is metallic, for the affected environment.: 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, within the proposed design.: 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, as the organization’s selected response.: 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. 28 amperes, for review.
2. B. 32.2 amperes.
3. C. 42 amperes, for this task.
4. D. 35 amperes, in the described situation.

Answer choices

1. A. 6 feet, as the proposed general code requirements approach.
2. B. 8 feet, in practice.
3. C. 12 feet, under the stated decision criteria.
4. D. 4 feet, for the stated scenario.

Answer choices

1. A. 0.007 volts, within the described context.
2. B. 0.96 volts, for the described technical objective.
3. C. 12.08 volts, for this decision.
4. D. 1.92 volts, for review.

Answer choices

1. A. Provide suitable support from the building structure or an approved support system and install the cabling in a neat, workmanlike manner
2. B. Leave the cable on the ceiling tiles because communications cable is exempt from support rules, for the described technical objective and its associated operational control requirements.
3. C. Tie the cable to any nearby power cable regardless of function, for the described technical objective and its associated operational control requirements.
4. D. Staple the cable to flexible raceway, for the described technical objective and its associated operational control requirements, under the described communication systems criteria.

Answer choices

1. A. Accept the 42 kA breaker because an upstream device always reduces fault current enough, under the organization’s defined implementation and exception-management process.
2. B. Reduce the feeder conductor size until the calculated fault current falls below 42 kA, for the described technical objective and its associated operational control requirements.
3. C. Accept the breaker because its normal-load ampere rating is correct, for the described technical objective and its associated operational control requirements.
4. D. Use equipment with an adequate interrupting rating for the available fault current, or provide a properly documented applicable series-rated combination.

Answer choices

1. A. Class III, for the described technical objective.
2. B. Ordinary location only, for this decision.
3. C. Class II, under the documented operational and governance requirements.
4. D. Class I, in this situation.

Answer choices

1. A. 29 CFR Part 1910, Subpart S, as the primary implementation for the described business requirement.
2. B. The construction provisions always supersede general industry
3. C. 29 CFR Part 1926, Subpart M, within the described operational context.
4. D. 29 CFR Part 1926, Subpart K, within the defined security and accountability boundaries.

Answer choices

1. A. 15.75 cubic inches.
2. B. 11.25 cubic inches, for review.
3. C. 13.5 cubic inches, within the described context.
4. D. 27 cubic inches, for this decision.

Answer choices

1. A. 44 days, for the stated scenario.
2. B. 24 days, as presented.
3. C. 4 days, as the organization’s selected response.
4. D. 20 days