Electrical Business

Code Conundrum February 2018 • Ray Yousef

February 26, 2018
February 26, 2018
By Ray Yousef


February 26, 2018 – Tackle February 2018’s Code Conundrum…if you dare!

The minimum ampacity for a feeder supplying power to an industrial building shall be based on a basic load of ___ W/m² of the area of the outside dimension of the building, plus other special loads and electric vehicle supply equipment loads.

a) 15 W/m²
b) 20 W/m²
c) 25 W/m²
d) 50 W/m²

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
d) 40 A

All space within 6 m horizontally in any direction from dip tanks and their drain boards, with the space extending to a height of 1m above the dip tank and drain board, is considered:

a) Zone 1
b) Zone 2
c) Category 1
d) Category 2

Answers to this month’s questions in March’s Electrical Business. MEANTIME, here are the answers to the January 2018 Code Conundrum!

Question 1
Branch circuits that supply receptacles or permanently connected medical electrical equipment within a patient care environment shall only supply loads within that environment.

a) True. Rule 24-102(3), CE Code 2018.

Question 2
“Flammable limits” of a gas or vapour is defined as the lower and upper ___ in air that forms an ignitable mixture.

b) percentage of volume concentration of the flammable gas. Rule 18-002, CE Code 2018.

Question 3
A branch circuit in a dwelling unit that feeds a bathroom receptacle and hallway receptacles is exempted from arc fault circuit interrupter (AFCI) requirements.

a) False. Rule 26-724(e), CE Code 2018.

How did YOU do?
3/3 = Master Electrician
2/3 = Journeyman
1/3 = Apprentice
0/3 = Bricklayer ?!?

The Code Conundrum is compiled by Ray Yousef, a code engineer with Ontario’s Electrical Safety Authority.

This article originally appeared in the February 2018 issue of Electrical Business Magazine.

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