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Code Conundrum September 2022

Tackle the code conundrum... if you dare!

September 20, 2022  By Ray Yousef



September 20, 2022 – Welcome to the newest round of questions that test your knowledge of the CE Code-Part I. Answers will appear in the October 2022 edition of Electrical Business Magazine (and here at EBMag.com). Good luck!

QUESTION 1 – A totally enclosed, non-ventilated Class B motor requires conductors rated at 38A. The minimum size copper multi-conductor cable that can be used is:

a) No. 10 AWG TECK90
b) No. 8 AWG TECK90
c) No. 8 AWG TW75
d) No. 6 AWG TW75

QUESTION 2 – Rapid shutdown is required for PV systems on or in buildings where the PV source or output conductors are:

a) More than 1.5 m from the array, with shutdown within 10 s.
b) More than 1.5 m from the array with shutdown within 30 s.
c) More than 1 m from the array, with shutdown within 10 s.
d) More than 1 m from the array, with shutdown within 30 s.
e) Rapid shutdown not required.

QUESTION 3 – Equipment marked Ex ia Gb is suitable for installation in a Zone 0 location.

a) True
b) False

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ANSWERS to Code Conundrum June 2022 edition.

QUESTION 1 – When Type CFC system wiring is used, it shall be covered with abrasion-resistant tape and secured to the floor so that all cables, corners, and bare conductor ends are completely covered.

a) True. Rule 60-328.
b) False

QUESTION 2 – What is the maximum length of 12 trade-size, liquid-tight flexible conduit permitted for the connection of equipment?

a) 600 mm
b) 750 mm
c) 1.0 metre
d) 1.5 metre. Rule 12-1302(2).

QUESTION 3 – The maximum rating for a circuit breaker protecting exposed wiring for permanent outdoor lighting circuit is:

a) 15 A
b) 20 A
c) 30 A. Rule 30-1120(1).
d) 40 A


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.

You’ll find Back Issues of Electrical Business Magazine in our Digital Archive.


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