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Code conundrum January 2017 • Ray Yousef

January 20, 2017 | By Ray Yousef

January 20, 2017 – Tackle the code conundrum if you dare!

Where non-metallic sheathed cable is exposed, switch, outlet and tap devices of insulating material can be used without boxes.

a) True    
b) False

The minimum headroom around an elevator’s controller and disconnecting means shall be:


a) 1.6 m   
b) 2 m    
c) 2.2 m
d) 2.5 m

Class 1 circuit conductors of #16 AWG copper do not extend beyond the equipment enclosure, and do not require overcurrent protection.

a) True    
b) False

Answers to these questions next month. Meantime, here are the answers to the December 2016 Code Conundrum:

Question 1
In a dwelling unit, what is the maximum mounting height to a panelboard’s overcurrent device handle (from floor level)?
c) 1.7 m. Rule 26-402(2).

Question 2
What size of tap conductor is required to connect a metal fence around an outdoor substation to the station ground electrode?
b) 2/0 AWG. Rule 36-312(2).

Question 3
When Type CFC system wiring is used, it shall be covered with abrasion-resistant tape and secured to the floor so that all cables, corners and bare conductor ends are completely covered
a) True.
Rule 60-328.


• 3/3 = Master Electrician
• 2/3 = Journeyman
• 1/3 = Apprentice
• 0/3 = Plumber?!?

The Code Conundrum is compiled by Ray Yousef of Ontario’s Electrical Safety Authority.

N.B. Always consult your AHJ for more specific interpretations.

* This article also appears in the January 2017 edition of Electrical Business Magazine. Check out our ARCHIVE page for back issues.

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