Electrical Business

Features Code Conundrum Codes & Standards

Code Conundrum January 2018 • Ray Yousef

February 13, 2018 | By Ray Yousef

February 13, 2018 — Tackle January 2018’s Code Conundrum… if you dare!


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
b) False

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


a) quantity of the flammable gas.
b) volume of the flammable gas.
c) percentage of volume concentration of the flammable gas.
d) kinetic energy in gas molecules.

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) True
b) False

Answers to this month’s questions in February’s Electrical Business. MEANTIME, here are the answers to the November/December 2017 Code Conundrum!

Question 1
Receptacles are permitted to be mounted facing up in a kitchen counter of an apartment.

b) False. Rule 26-710(c).

Question 2
For general power and lighting circuits, the maximum rating of overcurrent protection for a No. 12AWG copper conductor is:

b) 20A. Rule 14-104(2).

Question 3
The power supply of a fire alarm system shall be:

a) Provided by a separate circuit. Rule 32-108(1).

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 January 2018 issue of Electrical Business Magazine. 

Print this page


Stories continue below