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Code Conundrum Winter 2023

February 13, 2023 | By Ray Yousef

Tackle the Code Conundrum... if you dare!

February 13, 2023 – Welcome to the newest round of questions that test your knowledge of the CE Code-Part I. Answers will appear in the April 2023 edition of Electrical Business Magazine, and online at EBMag.com under Features.

QUESTION 1 – It is permitted to use electrical non-metallic tubing (ENT) underground and in concealed locations; however, it is not permitted in exposed locations.

a) True
b) False

QUESTION 2 – Which of the following CSA receptacle configurations is required for an electric range, having a calculated demand of 50A or less, in a dwelling unit?

a) L7-15R
b) 14-20R
c) 14-50R
d) 15-50R

QUESTION 3 – For a mobile home, the minimum length of #6AWG power supply cord measured from the attachment plug to the point of entrance to the unit is:

a) 4.0 m
b) 5.0 m
c) 6.0 m
d) 7.5 m


ANSWERS to Code Conundrum December 2022 edition

QUESTION 1 – Overload protection shall not be required for a manually started motor rated at ___ hp or less that is continuously attended while in operation, and that is on a branch circuit having overcurrent protection rated or set at not more than 15 A, or on an individual branch circuit having overcurrent protection as required by Table 29 when it may be readily determined from the starting location that the motor is running.

a) 1/2 hp
b) 1 hp. Rule 28-308.
c) 2 hp
d) 5 hp

QUESTION 2 – The interior of a storage tank that is vented to atmosphere, and contains flammable liquids stored above their flash point, is typically classified as:

a) Zone 0. Rule 18-006 and Appendix B Note.
b) Zone 1
c) Zone 2
d) Zone 20

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. Rule 14-212.

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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