What marking must each service box carry at the time of installation?
The maximum rating of the overcurrent device
Source: 2-100(2), CEC, 2021 P 74
Can acid be used for soldering in the electrical installation?
No, shall be non-corrosive to copper
Source: 2-118, CEC, 2021, P75
What must be done if a firewall is pierced by an electrical cable or raceway?
Shall be properly closed or sealed
Source: 2-128(2), CEC, 2021, P76
Can a 3-way or 4-way switch be considered as a disconnecting means?
No
Source: 2-304(2), CEC, 2021 P 77
Cct breaker, fuses and switches shall be conspicuously marked to clearly indicate, what?
A - which installation they protect
B - Maximum rating of overcurrent device permitted
Source: 2-100(3), CEC, 2021 P74
Can wood be used to anchor electrical equipment into masonry or concrete?
No
Source: 2-114, CEC, 2021, P75
What is the maximum voltage to ground permitted by the code for branch circuits in residential occupancies where no trained personnel are available?
150volt to ground
Source: 2-110, CEC, 2021 P75
What is the minimum working space required by the code for a switch board that contains renewable parts at the back?
1m
Source: 2-308(1), CEC, 2021 P77
What is the maximum branch circuit voltage-to-ground for a single-family dwelling?
150v
Source: 2-110, CEC, 2021 P 75
Can NMSC (Non-metallic sheathed cable) be used for wiring purposes in the attic of a single-family residence where zonolite fill ( a loose or free flowing insulation) is used as thermal insulation?
Yes
Source: 2-126(1) b, CEC, 2021 P75
An apartment building has a calculated load of 250 KVA on the service conductors. It employs a full-time maintenance electrician to look after any installation. What is the maximum voltage-to-ground for the fixed heaters installed in each apartment allowable under the code?
150 Volts - does not exceed 250 KVA to allow 347 / 600V
Source: 2-110, CEC, 2021 P 75
A high rise office tower has a calculated load of 500 KVA on the service conductors has central air conditioning and water heating facilities. Space heating is accomplished by electric heating. The building employs a FT maintenance electrician. Will the installation of florescent light fixtures have to comply with the maximum of 150 volts-to-ground for branch cct rule as specified in the code?
No, this is not a dwelling unit. Office, not sleeping.
Source: Section 0, Definition, CEC, 2021 p 61
Can a mineral insulated cable such as pyrotenax which has an outer skin made of copper be used in an installation that employs aluminium foil as a heat reflector in the ceiling? The purotenax cable is used as an electric heating cable in the ceiling.
No.
- Possibility of galvanic action
Source: 2-116(2) , CEC, 2021 p 75 - Not to be used where there is a possibility of corrosive action
Souce: 2-126(1)e, CEC, 2021 P 76
How many entrances be provided to give access to the working space about electrical equipment?
At least 1
Source: 2-310, CEC, 2021 p 78
Where the code makes reference to AWG wire size with no specific designation attached, what do they mean?
Unless otherwise specified, Copper AWG size
Source: 2-120, CEC, 2021 P75
