NFPA 70 National Electrical Code
Exam 2025 Questions and Answers
Table 314.16(B) - ANSWER✔✔-Volume Allowance Required per Conductor
392.22 - ANSWER✔✔-Cable tray fill
404.14 - ANSWER✔✔-Rating and use of switches
Table 314.16(A) - ANSWER✔✔-Box Volume metal boxes
What code section for Conductors in Parallel? - ANSWER✔✔-310.10(G)
The length of free conductors at outlets, junctions and switch points? (Code section?) -
ANSWER✔✔-300.14 At least 150mm (6in)
Article 230 - ANSWER✔✔-Services
RPM formula? - ANSWER✔✔-120 x Frequency (Hz) divided by number of poles
Voltage drop formula - ANSWER✔✔-2(K)(I)(D) divided by CM
K = direct current constant, copper (12.9 ohm), aluminum (21.2 ohm)
I = amps, current
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
Exam 2025 Questions and Answers
Table 314.16(B) - ANSWER✔✔-Volume Allowance Required per Conductor
392.22 - ANSWER✔✔-Cable tray fill
404.14 - ANSWER✔✔-Rating and use of switches
Table 314.16(A) - ANSWER✔✔-Box Volume metal boxes
What code section for Conductors in Parallel? - ANSWER✔✔-310.10(G)
The length of free conductors at outlets, junctions and switch points? (Code section?) -
ANSWER✔✔-300.14 At least 150mm (6in)
Article 230 - ANSWER✔✔-Services
RPM formula? - ANSWER✔✔-120 x Frequency (Hz) divided by number of poles
Voltage drop formula - ANSWER✔✔-2(K)(I)(D) divided by CM
K = direct current constant, copper (12.9 ohm), aluminum (21.2 ohm)
I = amps, current
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1