2015 Canadian Electrical Code, part I - tables

Question 1

Allowable ampacities for single unshielded copper conductors, rated not more than 5000 V, in free air
(based on an ambient temperature of 30 °C)

Answer 1

Table 1

Question 2

Allowable ampacities for not more than three copper conductors, rated not more than 5000 V and
unshielded, in raceway or cable (based on an ambient temperature of 30 °C)

Answer 2

Table 2

Question 3

Allowable ampacities for single unshielded aluminum conductors, rated not more than 5000 V, in free air
(based on an ambient temperature of 30 °C)

Answer 3

Table 3

Question 4

Allowable ampacities for not more than three aluminum conductors, rated not more than 5000 V and
unshielded, in raceway or cable (based on an ambient temperature of 30 °C)

Answer 4

Table 4

Question 5

Correction factors applying to Tables 1, 2, 3, and 4 (ampacity correction factors for ambient
temperatures above 30 °C)

Answer 5

Table 5A

Question 6

Correction factors for Tables 1 and 3 (where from two to four single conductors are present and spaced
less than 25% of the largest cable diameter)

Answer 6

Table 5B

Question 7

Ampacity correction factors for Tables 2 and 4

Answer 7

Table 5C

Question 8

Current rating correction factors where spacings are maintained (in ventilated and ladder-type cable
trays)

Answer 8

Table 5D

Question 9

Maximum number of 600 V thermoset conductors without a jacket, Types R90XLPE, RW75XLPE,
RW90XLPE, and RPV90, of one size in trade sizes of conduit or tubing

Answer 9

Table 6A

Question 10

Maximum number of 1000 V thermoset conductors without a jacket, Types R90XPLE, RW75XLPE,
RW90XLPE, and RPV90, of one size in trade sizes of conduit or tubing

Answer 10

Table 6B

Question 11

Maximum number of 600 V thermoset conductors with a jacket, Types R90XPLE, RW75XLPE, RW90XLPE,
R90EP, RW9075EP, RW90EP, and RPV90, of one size in trade sizes of conduit or tubing

Answer 11

Table 6C

Question 12

Maximum number of underground conductors, Types RWU90XLPE, TWU, and TWU75, of one size in
trade sizes of conduit or tubing

Answer 12

Table 6D

Question 13

Maximum number of 1000 V and 2000 V thermoset conductors without a jacket, Type RPVU90, of one
size in trade sizes of conduit or tubing

Answer 13

Table 6E

Question 14

Maximum number of 1000 V and 2000 V thermoset conductors with a jacket, Type RPVU90, of one size
in trade sizes of conduit or tubing

Answer 14

Table 6F

Question 15

Maximum number of 2000 V thermoset conductors without a jacket, Type RPV90, of one size in trade
sizes of conduit or tubing

Answer 15

Table 6G

Question 16

Maximum number of 1000 V thermoset conductors with a jacket, Type RPV90, of one size in trade sizes
of conduit or tubing

Answer 16

Table 6H

Question 17

Maximum number of 2000 V thermoset conductors with a jacket, Type RPV90, of one size in trade sizes
of conduit or tubing

Answer 17

Table 6I

Question 18

Maximum number of thermoplastic conductors, Types TW and TW75, of one size in trade sizes of
conduit or tubing

Answer 18

Table 6J

Question 19

Maximum number of thermoplastic conductors, Types TWN75 and T90 NYLON, of one size in trade
sizes of conduit or tubing

Answer 19

Table 6K

Question 20

Radius of conduit or tubing bends

Answer 20

Table 7

Question 21

Maximum allowable per cent conduit and tubing fill

Answer 21

Table 8

Question 22

Cross-sectional areas of rigid metal conduit

Answer 22

Table 9A

Question 23

Cross-sectional areas of flexible metal conduit

Answer 23

Table 9B

Question 24

Cross-sectional areas of rigid PVC conduit

Answer 24

Table 9C

Question 25

Cross-sectional areas of rigid Type EB1 PVC conduit and rigid Type DB2/ES2 PVC conduit

Answer 25

Table 9D

Question 26

Cross-sectional areas of rigid RTRC conduit marked IPS

Answer 26

Table 9E

Question 27

Cross-sectional areas of rigid RTRC conduit marked ID

Answer 27

Table 9F

Question 28

Cross-sectional areas of metallic liquid-tight flexible conduit

Answer 28

Table 9G

Question 29

Cross-sectional areas of non-metallic liquid-tight flexible conduit

Answer 29

Table 9H

Question 30

Cross-sectional areas of electrical metallic tubing

Answer 30

Table 9I

Question 31

Cross-sectional areas of electrical non-metallic tubing

Answer 31

Table 9J

Question 32

Dimensions of stranded conductors for calculating conduit and tubing fill

Answer 32

Table 10A

Question 33

Dimensions of photovoltaic cable for calculating conduit and tubing fill

Answer 33

Table 10B

Question 34

Dimensions of solid conductors for calculating conduit and tubing fill

Answer 34

Table 10C

Question 35

Dimensions of DLO cable for calculating conduit and tubing fill

Answer 35

Table 10D

Question 36

Conditions of use, voltage, and temperature ratings of flexible cords, heater cords, tinsel cords, equipment wires, Christmas-tree cords, portable power cables, elevator cables, stage lighting, and festoon cables

Answer 36

Table 11

Question 37

Allowable ampacity of flexible copper conductor cord and equipment wire (based on an ambient temperature of 30 °C)

Answer 37

Table 12

Question 38

Allowable ampacities for portable copper conductor power cables (amperes per conductor)

Answer 38

Table 12A

Question 39

Temperature correction factor

Answer 39

Table 12B

Question 40

Conductor rating correction factor

Answer 40

Table 12C

Question 41

Layering correction factor

Answer 41

Table 12D

Question 42

Allowable ampacities for Type DLO cables in a permanent installation in cable tray

Answer 42

Table 12E

Question 43

Rating or setting of overcurrent devices protecting conductors

Answer 43

Table 13

Question 44

Watts per square metre and demand factors for services and feeders for various types of occupancy

Answer 44

Table 14

Question 45

Bending radii — High-voltage cable

Answer 45

Table 15

Question 46

Minimum size conductors for bonding conductors

Answer 46

Table 16A

Question 47

Minimum size conductors for system bond jumpers and bonding conductors where busbars are used

Answer 47

Table 16B

Question 48

Conditions of use and maximum allowable conductor temperature of wires and cables other than flexible cords, portable power cables, and equipment wires

Answer 48

Table 19

Question 49

Spacings for conductors

Answer 49

Table 20

Question 50

Supporting of conductors in vertical runs of raceways

Answer 50

Table 21

Question 51

Space for conductors in boxes

Answer 51

Table 22

Question 52

Number of conductors in boxes

Answer 52

Table 23

Question 53

Minimum insulation resistances for installations

Answer 53

Table 24

Question 54

Overcurrent trip coils for circuit breakers and overload devices for protecting motors

Answer 54

Table 25

Question 55

Determining conductor sizes for motors for different requirements of service

Answer 55

Table 27

Question 56

Determining conductor sizes in the secondary circuits of motors

Answer 56

Table 28

Question 57

Rating or setting of overcurrent devices for the protection of motor branch circuits

Answer 57

Table 29

Question 58

Minimum clearances for bus support and rigid conductors

Answer 58

Table 30

Question 59

Minimum horizontal separations of line conductors attached to the same supporting structure

Answer 59

Table 31

Question 60

Vertical isolation of unguarded live parts

Answer 60

Table 32

Question 61

Horizontal clearances from adjacent structures (including protuberances)

Answer 61

Table 33

Question 62

Vertical ground clearances for open line conductors

Answer 62

Table 34

Question 63

Spacing for switches and fuses assembled in the field (not of the metal-enclosed type)

Answer 63

Table 35

Question 64

Maximum allowable ampacity for aluminum conductor neutral supported cables

Answer 64

Table 36A

Question 65

Maximum allowable ampacity for copper conductor neutral supported cables

Answer 65

Table 36B

Question 66

Motor supply conductor insulation minimum temperature rating, °C (based on an ambient temperature of 30 °C)

Answer 66

Table 37

Question 67

Minimum permitted size for 3-wire 120/240 V and 120/208 V service conductors for single dwellings and feeder conductors supplying single dwelling units of row housing of apartment and similar buildings and terminating on equipment having a conductor termination temperature of not less than 75 °C

Answer 67

Table 39

Question 68

External tapered threads for rigid metal conduit

Answer 68

Table 40

Question 69

Minimum size of bonding jumper for service raceways

Answer 69

Table 41

Question 70

Minimum conductor size for concrete-encased electrodes

Answer 70

Table 43

Question 71

Three-phase ac motors

Answer 71

Table 44

Question 72

Single-phase ac motors

Answer 72

Table 45

Question 73

Size of conduit for mobile homes

Answer 73

Table 48

Question 74

Transformers rated over 750 V having primary and secondary overcurrent protection

Answer 74

Table 50

Question 75

Minimum size of bare copper grounding conductor

Answer 75

Table 51

Question 76

Tolerable touch and step voltages

Answer 76

Table 52

Question 77

Minimum cover requirements for direct buried conductors, cables, or raceways

Answer 77

Table 53

Question 78

Minimum working space around electrical equipment having exposed live parts

Answer 78

Table 56

Question 79

Allowable ampacities for Class 2 copper conductors (based on an ambient temperature of 30 °C)

Answer 79

Table 57

Question 80

Ampacities of up to four insulated copper conductors in raceway or cable for short-time-rated crane and hoist motors (based on an ambient temperature of 30 °C)

Answer 80

Table 58

Question 81

Minimum size of protector grounding conductor for communications systems

Answer 81

Table 59

Question 82

Minimum buried cable horizontal separations from pools

Answer 82

Table 61

Question 83

Feeder demand factors for elevators

Answer 83

Table 62

Question 84

Hazardous areas for propane dispensing, container filling, and storage

Answer 84

Table 63

Question 85

Hazardous locations at NGV fuelling facilities

Answer 85

Table 64

Question 86

Enclosure selection table for non-hazardous locations

Answer 86

Table 65

Question 87

Ampacities of bare or covered conductors in free air, based on 40 °C ambient, 80 °C total conductor temperature, and 610 mm/s wind velocity

Answer 87

Table 66

Question 88

Clearance requirements of installed heating systems

Answer 88

Table 67

Question 89

Maximum conductor length measured from the supply side of the consumer’s service to the furthest point of utilization on a circuit using 90 °C rated copper conductors at 30 °C ambient temperature for 120 V single-phase ac circuits (2-wire circuits) when used in dwelling units

Answer 89

Table 68