Construction codes of Ontario

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Maximum circuit loading (see Appendix B)

Maximum circuit loading (see Appendix B) 1) The ampere rating of a consumer’s service, feeder, or branch circuit shall be the ampere rating of the overcurrent device protecting the circuit or the ampacity of the conductors, whichever is less. 2) The calculated load in a circuit shall not exceed the ampere rating of the circuit. […]

Maximum number of insulated conductors in a box

Maximum number of insulated conductors in a box (see Appendix B) 1) Boxes shall be of sufficient size to provide usable space for all insulated conductors contained in the box, subject to the following: a) an insulated conductor running through a box with no connection therein shall be considered as one insulated conductor;b) each insulated […]

Maximum number of outlets per circuit (see Appendix B)

Maximum number of outlets per circuit (see Appendix B) 1) Except as permitted by other Rules of this Code, the maximum number of outlets on any 2-wire branch circuit shall not exceed the following: a) 12 outlets for a 15 A branch circuit where the fused switch or circuit breaker is marked for continuous operation […]

Mechanical Protection for Electrical Cables

Mechanical Protection for Electrical Cables 1) Where subject to mechanical damage, mineral-insulated cable, aluminum-sheathed cable, and copper-sheathed cable shall be suitably protected. 2) Where mineral-insulated cable, aluminum-sheathed cable, or copper-sheathed cable is installed on the face of a wall, partition, ceiling, or structural member within 1.5 m of the floor, and in all locations where […]

Minimum cover requirements for direct buried cables or insulated conductors in raceways Table

Minimum cover requirements for direct buried cables or insulated conductors in raceways Table Table 53 (See Rule 12-012.) Note: Minimum cover means the distance between the top surface of the conductor, cable, or raceway and the finished grade. Source: Table 53, CSA C22.1:21, Canadian Electrical Code, Part 1 (25th Edition), Safety Standard for Electrical Installations. […]

Minor Combustible Components

(1) The following minor combustible components are permitted in a building required to be of noncombustible construction: (a) paint, (b) self-adhesive tapes, mastics and caulking materials applied to provide flexible seals between the major components of exterior wall construction, (c) fire stops conforming to Sentence 3.1.9.1.(1) and fire blocks conforming to Article 3.1.11.7., […]

Notching of Lumber Roof, Ceiling or Floor Joists

Notching of Lumber Roof, Ceiling or Floor Joists Notches made on the upper side of lumber joists near their ends (Figure 148) must be located within one-half the joist depth from the edge of the bearing and their depth cannot be more than one-third of the joist depth. Notches are not permitted on the bottom […]