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Code Conundrum April 2022

Tackle the Code Conundrum... if you dare!

April 22, 2022  By Ray Yousef



April 22, 2022 – Welcome to the newest round of questions that test your knowledge of the CE Code-Part I. Answers will appear in the May 2022 edition of Electrical Business Magazine (and here at EBMag.com).

QUESTION 1 – Does the CE Code allow two supply services of the same voltage from the same system of any supply authority to enter a building if one will only be used for supplying a fire pump?

a) Yes
b) No

QUESTION 2 – For a mobile home, the minimum permitted conductor size for the power supply cord is:

a) #10 AWG
b) #8 AWG
c) #6 AWG
d) #4 AWG

QUESTION 3 – Which of the following insulated wire can be marked permanently in green to be used as a bonding wire?

a) #10 AWG
b) #8 AWG
c) #6 AWG
d) #1 AWG

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ANSWERS to Code Conundrum February 2022 edition.

QUESTION 1 – Conductors for equipotential bonding shall be permitted to be installed as open wiring, provided that they are adequately secured.

a) True. Rule 10-702(1).
b) False

QUESTION 2 – 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. Rule 36-312(2).
c) 3/0 AWG
d) 4/0 AWG

QUESTION 3 – 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. Rules 76-012, 76-016.


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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