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Code Conundrum April 2019

April 11, 2019 | By Ray Yousef

April 11, 2019 – Tackle the Code Conundrum if you dare!

Question 1
TC-ER cables may transition exposed between cable trays:
a) For any length needed.
b) Up to 1.5 m when not supported.
c) Up to 7.5 m when supported.
d) B & C.
e) None of the above; ‘ER’ indicates Emergency Runs only.

Question 2
When metal enclosed high-voltage equipment is installed in an electrical room, which of the following—within the room—is to be grounded to the station ground electrode?
a) Metal doors and door frames.
b) Metal pipe works.
c) Metal ventilation ductwork.
d) Metal window grills.
e) None of the above.

Question 3
True or false: An identified conductor is required at a switch controlling a receptacle used for lighting in a living or sleeping room.
a) True
b) False


Answers to this month’s questions will appear in the May 2019 issue of Electrical Business. In the meantime, here are the answers to the February 2019 Code Conundrum:

Question 1
Receptacles in CSA configurations 5-15R or 5-20R, installed in buildings under construction, _____________.
d) All of the above (i.e. shall be protected by GFCI Class A; can be wired by NMSC according to Rules 12-500 to 12-526; and shall be kept entirely separate from lighting branch circuits). Rules 76-012 and 76-016, CE Code 2018.

Question 2
True or false: the CE Code allows the use of non-metallic sheathed cable in a building of combustible construction.
a) True. Rule 12-504, CE Code 2018.

Question 3
For a mobile home, the minimum permitted size conductor for the power supply cord is:
c) #6 AWG. Rule 70-108(4)(a), CE Code 2018.

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 (ESA). For more information, visit www.esasafe.com.

This column originally appeared in the April 2019 issue of Electrical Business magazine.

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