June 17, 2019 – Tackle the Code Conundrum if you dare!
For a disconnect switch fused at 400 A and fed with multi-conductor 600-kcmil copper in a raceway, marking is required beside it to state the maximum permitted continuous load.
The consumer’s service head or equivalent shall be installed in such a position that the point of emergence of the conductors from it is a maximum distance of _____ horizontally from the support for attachment of the overhead service conductors.
A) 150 mm
B) 300 mm
C) 600 mm
D) 750 mm
E) none of the above
When feeding building B from building A:
A) The system shall not be grounded at Building B.
B) A bonding conductor is required to be installed from Building A to Building B.
C) A system bonding jumper is required to be installed in the panel of building B.
D) All of the above.
E) A & B.
Answers to this month’s questions will appear in the August 2019 issue of Electrical Business magazine.
In the meantime, here are the answers to the May 2019 Code Conundrum:
Each vehicle space in a carport or garage is required to have:
b) One receptacle for each vehicle space, readily accessible. Rule 26-726, CE Code 2018.
Rapid shutdown is required for PV systems on or in buildings where the PV source or output conductors are:
d) More than 1 m from the array with shutdown within 30 seconds. Rule 64-218, CE Code 2018.
Equipment marked Ex ia Gb is suitable for installation in a Zone 0 location.
b) False. Rule 18-090, Table 18, 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 June 2019 issue of Electrical Business magazine.
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