Test Your Code IQ — July 2024

Courtesy of www.MikeHolt.com.

All questions and answers are based on the 2023 NEC.

Q1: The number of receptacle outlets for guest rooms in hotels and motels shall not be less than that required for a dwelling unit. These receptacles shall be located to be convenient for permanent furniture layout, but at least _____ receptacle outlet(s) shall be readily accessible.

a) one

b) two

c) three

d) four

Q2: Dry-type transformers 1,000V nominal or less and not exceeding _____ that are installed in hollow spaces of buildings and not permanently closed in by the structure, shall not be required to be readily accessible.

a) 10kVA

b) 25kVA

c) 50kVA

d) 112.50kVA

Q3: Each multiconductor cable installed in conduit in a Class I, Division 1 location shall be considered as a single conductor if the cable is incapable of transmitting _____ through the cable core.

a) gases or vapors

b) dust

c) flyings

d) any of these

Q4: The minimum service-entrance conductor size shall have an ampacity not less than the maximum load to be served after the application of any _____ factors.

a) adjustment

b) correction

c) demand

d) adjustment or correction

Q5: If the grounding electrode conductor to a ground rod does not extend to other types of electrodes, the grounding electrode conductor shall not be required to be larger than _____ copper wire.

a) 10 AWG

b) 8 AWG

c) 6 AWG

d) 4 AWG

Q6: For PV system rapid shutdown systems, controlled conductors located outside the array boundary or more than 3 ft from the point of entry inside a building shall be limited to not more than _____ within 30 seconds of rapid shutdown initiation. 

a) 80V

b) 50V

c) 30V

d) 15V

Answers:

Q1: b) two

As stated in Sec. 210.60(B), "At least two receptacle outlets shall be readily accessible."

Q2: c) 50kVA

Section 450.13(B) confirms, "Dry-type transformers 1,000V, nominal, or less and not exceeding 50kVA shall be permitted in hollow spaces of buildings not permanently closed in by structure, provided they meet the ventilation requirements of Sec. 450.9 and separation from combustible materials requirements of Sec. 450.21(A). Transformers so installed shall not be required to be readily accessible."

Q3: a) gases or vapors

Per Sec. 501.15(D)(3): "Each multiconductor cable installed in conduit shall be considered as a single conductor if the cable is incapable of transmitting gases or vapors through the cable core."

Q4: d) adjustment or correction

According to Sec. 230.42(A)(2), “The minimum service-entrance conductor size shall have an ampacity not less than the maximum load to be served after the application of any adjustment or correction factors.”

Q5: c) 6 AWG

Section 250.66(A) confirms that the grounding electrode conductor shall not be required to be larger than 6 AWG copper wire if the grounding electrode conductor to a ground rod does not extend to other types of electrodes.

Q6: c) 30V

Per Sec. 690.12(B)(1): "Controlled conductors located outside the boundary or more than 3 ft from the point of entry inside a building shall be limited to not more than 30V within 30 seconds of rapid shutdown initiation." 

These materials are provided by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code.