Tackle the code conundrum if you dare!
Answers to this month’s questions will appear in the May issue of Electrical Business.
QUESTION 1
When only 4 conductors of an 8-conductor cable (not marked LP) are used for power, the ampacities obtained from Table 60 must be multiplied by:
a) 0.5
b) 1
c) 1.4
d) 2
e) None of the above
QUESTION 2
The ampacity of an approved cable bus assembly is determined from:
a) A Section 4 ampacity calculation
b) The ampacity on the product label
c) A certified test report from the cable bus manufacturer
d) A and C
e) A and B
QUESTION 3
A bonding connection is required for any device having a bonding terminal and mounted on a non-metallic outlet box.
a) True
b) False
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ANSWERS from February 2020 edition.
Question 1
A totally enclosed, non-ventilated Class B motor requires conductors rated at 38A. The minimum size of copper multi-conductor cable that can be used is:
b) No. 8 AWG TECK90. Ref. 28-104, Table 37 & Table 2.
Question 2
A disconnect for luminaires with double-ended lamps operating at 120V is required for:
e) None of the above. Ref. 30-308
Question 3
For a single dwelling unit with 100A breaker using No. 3 AWG copper service conductors, is the required marking based on Rule 4-004 22) and Table 39?
b) No. Ref. Rule 4-004 22) and Table 39.
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About the author…
Ray Yousef is a code engineer with Ontario’s Electrical Safety Authority.
This article—along with other great content—appears in the April 2020 edition of Electrical Business Magazine.
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