Canadian Electrical Code Part 2 Pdf – The Code is a complete document. Sometimes it can seem very daunting to quickly find the information you need. This series of articles provides a guide to help users find their way through this critical document. This is not intended to replace the notes in Appendix B or the explanations of the individual requirements in the CEC Handbook**, but we hope it will help you navigate the Code.
(CE-C 25th edition, Part I, (C22.1-21) * available from CSA Group. This discussion of tables is based on this edition).
Canadian Electrical Code Part 2 Pdf

This section of the Code contains 99 tables of tabular information to which the different rules of the Code refer. The tables referred to in the Regulation are considered normative (mandatory) elements of the Code. Note that the tabular information in Table D of Appendix D is considered non-normative (optional) items.
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Provide allowable ampacities for unprotected conductors with a rated voltage of not more than 5000 volts based on the maximum allowable temperature of the conductor of
, provide the dimensions of cables, single-core and single-core insulated conductors to calculate the filling of lines and pipes.
Provides the maximum allowable percentage of filling of lines and pipes by the number and type of insulated conductors or single or multi-core lead-covered cables as specified in
Provide reference tables for inside diameter and cross-sectional area of various types of commercial lines and pipes as required
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, specify the dimensions, diameter and area of different sizes and types of conductors and cables to calculate line and pipe fill:
, gives the conditions of use, rated voltages and temperatures of various types of conductors and cables by location, use, type, type, voltage and temperature and includes reference notes.
, gives the allowable amperage of cables with flexible insulated copper conductors and equipment cables at an ambient temperature of 30 °C according to the type and number of conductors in the rope or cable.

, gives the permissible currents for portable power cables with copper conductors according to the number of conductors, the rated voltage and whether they are shielded or not.
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, provides the rating or configuration of overcurrent devices that protect conductors for general use if not specifically specified and is based on the ampacity of conductor A.
, provides watts per square meter and demand factors for services and feeders according to different types of occupation.
, referred to in Rule 10-302, specifies the conditions for automatic alarm activation and system shutdown for various impedance-grounded systems.
, provides conditions of use for insulated conductors and cables, except flexible cables, portable power cables and equipment cables.
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, sets minimum space requirements for insulated conductors in boxes based on the size of the individual conductor.
, determines the permitted number of insulated conductors in boxes depending on the type and dimensions of the box.
, provides the number and location of surge release coils for motor protective circuit breakers and overload devices by system or motor type.

, describes the sizing of motor conductors for different service classes based on the percentage of nameplate rated current.
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, determines the sizes of the conductors in the secondary circuits of the motor based on the percentage of full load capacity of the insulated conductors of the secondary circuit and the class of service.
, provides the percentage of rated full load current or the setting of motor branch overcurrent devices for circuits and by motor type.
, determines the minimum horizontal spacing of network conductors connected to the same supporting structure at the maximum voltage of the system.
, limits the required vertical insulation of exposed live parts based on the system’s maximum voltage and whether the area is exposed to vehicular traffic, pedestrian accessibility, and heavy or light snow loads.
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, provides the clearance required for field-mounted circuit breakers and fuses in a non-metallic enclosure based on the maximum voltage and circuit breaker and fuse type.
, provide the maximum permissible currents for aluminum and copper conductors, supported neutral wires, depending on the size and type of phase conductor.
, provides the lowest temperature of the motor conductor conductor depending on the ambient temperature of 30 degrees Celsius, the motor case type and the insulation class classification.
Provides demand factors for electric vehicle supply equipment based on the number of spaces or stalls per feeder and the maximum load in watts per space or stall.
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, gives the number of external threads per 25.4 mm (inches) and the minimum and maximum thread length in millimeters for a commercial size of rigid metal conduit.
, provides multiplication factors for sizing insulated power conductors for single transformer arc welding machines and inverter welding machines.
, provides a minimum size of bare copper conductor for electrodes embedded in concrete based on the amperage of the largest service conductor or multi-conductor equivalent.
, provides the full-load current for three-phase AC motors as a function of rated motor power, rated voltage, and type of induction, cage-wound rotor motors, or unity power factor synchronous motors.
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, provides the minimum commercial conduit size for mobile homes based on the primary surge protection rating and whether the system ground is on or off.
, for transformers of rated voltage greater than 750 V, provides a percentage of the maximum rated setting or value of the primary and secondary overcurrent protective devices in relation to the rated impedance of the transformer.
, provides the minimum size of bare copper ground conductors for high-voltage installations based on the maximum available short-circuit current, maximum fault duration, and whether the connection is soldered, heat-soldered, glued, or bolted.
, provides acceptable touch and step voltages depending on soil type, soil resistance in ohms per meter, and fault duration.
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, provides minimum coverage requirements in millimeters for directly buried cables or insulated conductors in conduits depending on the wiring method and regardless of whether they are installed in vehicles or in non-vehicular areas.
, provides the smallest working space around electrical equipment that has exposed live parts, relative to the rated voltage to ground.
Gives the allowable amperage for Class 2 copper conductors, depending on the size of the conductor and whether it is a single conductor outdoors or no more than three copper conductors in a conduit or cable and a temperature environment of 30 degrees Celsius. If there are more than three conductors in the conduit, use the derating factors shown in column 3.
, for short-duration crane and hoist motors, provides power for up to four insulated copper conductors in a conduit or cable for operating temperature and duration at an ambient temperature of 30 degrees Celsius. For five or more electrical conductors in a conduit or cable, the ampacities shown in this table are reduced by 80%. For ambient temperatures above 30 degrees Celsius, use derating factors
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, provides a minimum protective ground conductor size for communications systems based on the maximum number of circuits to be protected and whether they are protected or not.
, provides allowable ampacities for Class 2, eight-conductor, copper power and data communication cables based on conductor and cable size and number of cables in the bundle.
, ensures a minimum horizontal separation of the buried cable pool, depending on the type of installation (communication or energy) and if the cable is directly buried without a jacket with a bare neutral, cables with a semiconductor jacket, cables with a – conductive jacket conductive jacket or conductors in non-conductive channels.
, describes hazardous areas for propane dispensing, tank filling, and storage by location, extent of hazardous locations, and Group IIA hazardous locations.
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, describes hazardous locations in CNG fuel facilities by location and extent of hazardous location zone or compartment.
, provides a table for selecting enclosures for non-hazardous locations based on degree of protection from environmental conditions, type of enclosure, and whether indoor or indoor/outdoor use only.
Provides power for bare or covered outer conductors based on an ambient temperature of 40 degrees Celsius, a total conductor temperature of 80 degrees Celsius and a wind speed of 610 millimeters per second for copper and aluminum conductors.
, provides the minimum clearance requirements for installed space heating systems based on the type of heating system and the location and type of obstructions and outlets.
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, provides the maximum length of insulated conductor for single-phase 120-volt residential circuits, as measured by the customer service supply to the farthest point of use, in a circuit using 90-degree copper insulated conductors, at a temperature 30 degree environment. Celsius based on conductor size and overcurrent protection ratings.
, describes hazardous locations in bulk storage facilities by location, hazardous location extent, and hazardous location zone.
, provides calculated power and service loads for RV fleets (based on groups of RVs from highest to lowest power)
In the next section, we will discuss the diagram and the appendix sections. Last month’s installment covers electric vehicle charging systems.
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Source: CSA C22.1:21, Canadian Electrical Code, Part 1 – Safety Standard for Electrical Installations. © 2021 Canadian Standards Association. Please visit
Or call 1-800-463-6727. By permission of CSA Group, material reproduced from CSA Group CSA Standard C22.1:21, Canadian Electrical Code, Part 1 – Safety Standard for Electrical Installations. This material is not complete and is not CSA Group’s official position on the above
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