D2 LT4 CEC Section 76 Temporary Wiring

Question 1

What is the minimum length of a tap conductor?

Answer 1

450 mm

Question 2

Is it necessary to install grounding systems for temporary wiring?

Answer 2

Yes.

Question 3

What should electricians working on construction sites be aware of?

Answer 3

Receptacles for portable power tools must be protected by GFCIs.

Question 4

What is the maximum length of a tap conductor?

Answer 4

2 m

Question 5

What will grounding and bonding protect against?

Answer 5

Shock hazards

Question 6

What diameter must the circle have if access to the outlet box is through the recessed luminaire?

Answer 6

15 cm

Question 7

Why is grounding and bonding important for overcurrent devices?

Answer 7

Allows them to do their job

Question 8

What does Section 76 of the code provide rules for?

Answer 8

Temporary electrical installations

Question 9

What size ground wire connects the two ground rods to the main fusible disconnect?

Answer 9

6 AWG copper

Question 10

Where is service equipment typically installed?

Answer 10

Within a structure or weatherproof enclosure

Question 11

What is the maximum distance between the outlet box and the fixture?

Answer 11

350 mm

Question 12

What is the purpose of temporary service equipment in construction sites?

Answer 12

Supply power for power tools

Question 13

What is the minimum distance between the outlet box and the fixture?

Answer 13

300 mm

Question 14

What is the maximum service capacity when mounted to a single pole?

Answer 14

200-A

Question 15

What must be provided if the fixture opening is smaller than 150 mm for accessing the junction box?

Answer 15

separate rectangular access hatch

Question 16

Why should lighting circuits not be connected to power circuits?

Answer 16

Workers may be left in the dark if a power tool causes a circuit trip

Question 17

What are some examples of what temporary electrical installations in Section 76 provide power for?

Answer 17

Lighting, power, tools, heating

Question 18

Where can electricians find regulations regarding receptacles for portable power tools?

Answer 18

Review Section 76 of the CEC.

Question 19

Why are many general requirements of the Code relaxed for temporary electrical installations?

Answer 19

Impractical to apply usual wiring methods

Question 20

Which tables are helpful when selecting portable power cables and flexible cords?

Answer 20

Table 19 and Table 11.

Question 21

What is Figure 57 in the text used for?

Answer 21

Illustration of a temporary service

Question 22

What is required for installing overhead conductors or cables when equipment and operations on the ground make it necessary?

Answer 22

Suitable supports spaced at intervals.

Question 23

What are the minimum and maximum span lengths for single conductor sizes listed in the rules?

Answer 23

4.5 m to 15 m, 15 m to 30 m, 30 m to 40 m.

Question 24

What is the maximum value for dimension ‘A’ in Subrule (4)?

Answer 24

350 mm

Question 25

What is the maximum span for neutral supported cables according to Rule 12-318(c)?

Answer 25

38 m.

Question 26

Where can more information about these requirements be found?

Answer 26

Review Section 30 of the Code

Question 27

What type of circuit interrupters should protect receptacles in construction projects?

Answer 27

Class A ground fault circuit interrupters

Question 28

What must the wiring construction for temporary installations be?

Answer 28

Portable, flexible, easy to modify

Question 29

What type of portable power cables and flexible cords must be used for temporary wiring in construction?

Answer 29

Extra-hard-usage outdoor type.