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Code Conundrum April 2024
April 30, 2024 | By Ray Yousef
Tackle the Code Conundrum... if you dare!
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April 30, 2024 – Welcome to the newest round of questions that test your knowledge of the CE Code-Part I. Answers will appear in the June 2024 edition of Electrical Business Magazine, and online at EBMag.com.
QUESTION 1 – What size of copper tap conductor is required to connect a metal fence around an outdoor substation to the station ground electrode?
a) 6 AWG
b) 2/0 AWG
c) 3/0 AWG
d) 4/0 AWG
QUESTION 2 – Receptacles having CSA configurations 5-15R or 5-20R installed in buildings under construction:
a) Shall be protected by GFCI Class A
b) Can be wired by NMSC
c) Shall be kept entirely separate from lighting branch circuits
d) All of the above
QUESTION 3 – Class H fuses are permitted to be used for overcurrent protection where circuit overload protection is provided by other means.
a) True
b) False
ANSWERS to Code Conundrum, February 2024 edition.
QUESTION 1 – What is the maximum allowable ampacity for a #6AWG T90 Nylon run in conduit containing 6 #6AWG T90 Nylon, 12 #14AWG TWU75 and 7 #12AWG TW75?
a) 65 A
b) 55 A
c) 39 A
d) 33 A. Rule 4-004(13)(14).
QUESTION 2 – Areas where paint finishes are regularly applied by spraying and there is adequate ventilation, the interior of spray booths—and their exhaust ducts—are considered:
a) Zone 0
b) Zone 1. Rule 20-302(1).
c) Zone 2
d) Zone 20
QUESTION 3 – When receptacles in a trailer park are mounted vertically, the CE Code requires the U-ground slot to be:
a) At the top. Rule 72-110(3).
b) At the bottom
How did you do?
3 • Seasoned journeyman
2 • Need refresher training
1 • Apprentice
0 • Just here for fun!
Ray Yousef is a code engineer with Ontario’s Electrical Safety Authority.
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