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Code Conundrum March 2018 • Ray Yousef

April 4, 2018 | By Ray Yousef

April 4, 2018 — Tackle March 2018’s Code Conundrum…if you dare!

Single-phase inverters for an interactive solar photovoltaic system are not permitted to be connected to 3-phase systems, unless:

a) designed to provide 3-phase system voltages, that are balanced within the limits of supply authority requirements.
b) in compliance with requirements of Rule 84-018.
c) in compliance with requirements of Rule 84-008.
d) all of the above.

Bare or insulated conductors not enclosed in grounded metal shall be used in service rooms accessible only to authorized persons.


a) True
b) False

Where batteries are used as a source of the emergency power supply, the batteries shall be kept in proper condition and charged 50% (minimum) at all times.

a) True
b) False

Answers to this month’s questions in April’s Electrical Business. MEANTIME, here are the answers to the February 2018 Code Conundrum!

Question 1
The minimum ampacity for a feeder supplying power to an industrial building shall be based on a basic load of ___ W/m2 of the area of the outside dimension of the building, plus other special loads and electric vehicle supply equipment loads.

c) 25 W/m2. Rule 8-210, CE Code 2018.

Question 2
The maximum rating for a circuit breaker protecting exposed wiring for a permanent outdoor lighting circuit is:

c) 30 A. Rule 30-1120, CE Code 2018.

Question 3
All space within 6 m horizontally in any direction from dip tanks and their drain boards, with the space extending to a height of 1 m above the dip tank and drain board, is considered:

a) Zone 1. Rule 20-302, CE Code 2018.

How did YOU do?

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

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