March 21, 2024 – Welcome to the newest round of questions that test your knowledge of the CE Code-Part I. Answers will appear in the April 2024 edition of Electrical Business Magazine, and online at EBMag.com.

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

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
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
b) At the bottom

ANSWERS to Code Conundrum, December 2023 edition.

QUESTION 1 – For the identification of intrinsically safe wiring, which of the following methods is acceptable:

a) Cables are labelled
b) Cables are identified Blue
c) Cables are identified Light Blue, where Light Blue is not used for any other cabling
d) a and b
e) a and c. Rule 18-064.

QUESTION 2 – When only 4 conductors of an 8-conductor cable (not marked LP) are used for power, the ampacities obtained from Table 60 must be multiplied by:

a) 0.5
b) 1
c) 1.4. Rule 16-330(3).
d) 2
e) None of the above

QUESTION 3 – TC-ER cables may transition exposed between cable trays when supported at intervals not exceeding 1.5 m, and mechanically protected by acceptable means or by location.

a) True. Rule 12-2202.
b) False

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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