Texas Master Electrician Practice Test

Answer choices

1. A. Emergency conductors must always be aluminum
2. B. Normal conductors become emergency conductors when sharing a raceway
3. C. Separation is optional if both sources are 480 volts
4. D. Emergency system wiring must be kept independent from normal wiring except where the NEC specifically permits sharing

Wrong-answer review

• A. Emergency conductors must always be aluminum: Incorrect. Conductor material is not the separation issue.
• B. Normal conductors become emergency conductors when sharing a raceway: Incorrect. Circuit function does not change by proximity.
• C. Separation is optional if both sources are 480 volts: Incorrect. Voltage equality does not waive required emergency-system independence.

Answer choices

1. A. The service disconnect should be located nearest the point of entrance of the service conductors
2. B. The conductors must automatically be changed to aluminum
3. C. The main disconnect must be outdoors in every case
4. D. The 70-foot interior run is acceptable because service conductors may extend up to 100 feet before the disconnect

Answer choices

1. A. Use equipment and wiring methods identified for the hazardous classification and the specific gas or vapor conditions
2. B. Use ordinary dry-location equipment if it is grounded
3. C. Use any equipment with a metal enclosure
4. D. Use residential-grade equipment protected by GFCI

Answer choices

1. A. Whether the door is painted red
2. B. Whether the service conductors are aluminum
3. C. Whether the room contains fluorescent lighting
4. D. Whether the disconnect remains readily accessible to the persons who require access under the applicable NEC conditions

Answer choices

1. A. 16 amperes
2. B. 24 amperes
3. C. 20 amperes
4. D. 12.8 amperes

Answer choices

1. A. The disconnect must be painted red
2. B. The circuit conductors must be upsized
3. C. The disconnect must be replaced with a fuse
4. D. The disconnect is not readily accessible

Answer choices

1. A. The cord, receptacle, branch circuit, and disconnecting arrangement comply with the appliance and branch-circuit rules
2. B. Cord-and-plug connection automatically waives branch-circuit rules
3. C. A grounding conductor is never needed with a cord
4. D. Use any receptacle rating below the appliance load because cord-and-plug connection makes the branch-circuit rating noncritical

Answer choices

1. A. Permit the battery system in any indoor location below 600 volts because low-voltage ESS installations have no location restrictions
2. B. The ESS requires no disconnect because batteries are dc sources
3. C. The ESS equipment, disconnecting means, overcurrent protection, and installation comply with Article 706 and the listing
4. D. Only the utility service rules apply

Answer choices

1. A. Apparent power is always lower than real power
2. B. Apparent power is greater than real power
3. C. Apparent power equals real power regardless of power factor
4. D. Apparent power becomes zero at lagging power factor

Answer choices

1. A. Install an approved steel plate or equivalent protection against nails and screws
2. B. Wrap the cable with electrical tape
3. C. Increase the circuit breaker size
4. D. Increase the equipment grounding conductor size so it shields the NM cable from nail or screw penetration through framing