November 1, 2022 – Welcome to the newest round of questions that test your knowledge of the CE Code-Part I. Answers will appear in the December 2022 edition of Electrical Business Magazine (and here at EBMag.com). Good luck!

QUESTION 1 – The CE Code requires a splitter to be installed where two or more conductors are connected to a conductor larger than ___ copper.

a) #4 AWG
b) #6 AWG
c) #1/0 AWG
d) #2/0 AWG

QUESTION 2 – For single dwelling units, the CE Code requires a minimum ___ duplex receptacles to be installed in a 2-door car garage with overhead door openers, a cord-connected central vacuum, and a garbage disposal unit installed.

a) 2
b) 4
c) 5
d) 6

QUESTION 3 – Does the CE Code permit a bare neutral in a consumer service when this conductor is made of copper and run in a raceway?

a) Yes
b) No

ANSWERS to Code Conundrum September 2022 edition

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. Rule 28-104, Tables 37 and 2.
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. Rule 64-218.
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. Rule 18-090, Table 18.

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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