Tackle the code conundrum if you dare!

Welcome to a new round of Code Conundrum questions! Answers to come in our December 2020 edition.

Question 1

Which of the following is an acceptable location for the installation of HDPE conduit?

a) Underground, encased in concrete
b) Underground, direct-buried
c) Above-ground when encased in concrete
d) All of the above
e) B and C

Question 2

A 75-kVA transformer hanged from a ceiling structure in an office building is required to have a minimum 1 m of working space:

a) only on the sides to provide access to conductor connections
b) on all sides
c) with secure footing
d) A and C
e) none of the above, working space only applies to floor-mounted transformers

Question 3

Where the DC arc fault protection is not located at the photovoltaic module, mechanical protection is required for PV source circuit conductors installed on or above buildings to protect against rodent damage.

a) True
b) False

ANSWERS

In case you missed the answers from our June 2020 edition…

Question 1

A consumer’s service conductors entering a service box that is not equipped with a barrier between the line and load sides shall:

A) enter the service box as close as possible to the line terminals of the main switch or circuit breaker.
B) enter the service box from the bottom.
C) not come into contact with nor cross conductors connected to the load terminals of the main switch or circuit breaker.
D) all of the above.
E) A and C. Rule 6-212 3). – CORRECT

Question 2

Non-locking 15A receptacles in a hospital shall be “hospital-grade” in:

A) Critical care areas only
B) Intermediate and critical care areas only
C) Basic, intermediate and critical care areas. Rules 24-106, 24-114. – CORRECT
D) The whole building

Question 3

Solid-state devices are permitted to be used as isolating switches, but not as disconnecting means.

A) True
B) False. Rule 14-700. – CORRECT

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, esasafe.com.

This column—along with other great content—appears in the October 2020 edition of Electrical Business Magazine.