Installation of Electrical Equipment - Section 26 Flashcards Preview

CEC 2015 Period 1,2&3 SAIT-Alberta > Installation of Electrical Equipment - Section 26 > Flashcards

Flashcards in Installation of Electrical Equipment - Section 26 Deck (24):
1

In a normal wall space of a single dwelling (bedroom, living room, etc...), what is the maximum distance allowed between receptacles?

3.6 meters

2

What is an "outlet"?

A point in the wiring where current is used to supply utilization equipment.

3

Why would a battery room be used?

  • As backup power, an outage could result in a major costly data loss.
  • Communication circuits
  • Emergency lighting

4

CEC rules for battery installation protect against what hazards?

  • Short circuits
  • Corrosion of conductors
  • Battery leakage

5

Where could one find general rules regarding receptacles?

Section 26-700

6

Do battery rooms need ventilation?

Yes, to prevent buildup of hydrogen gas.

7

Which receptacles in a single dwelling do not need to be tamper resistant?

Those behind fixed appliances and any located two meters above the floor.

8

What is a "branch circuit"?

The wiring between the last over current device and a utilization point.

9

How close to a sink should a receptacle be to require gfci protection?

1 meter or less.

10

Where could one go in the CEC to find graphical configurations for locking and non locking receptacles?

Diagram 1 and 2.

11

If a panel is located between the entrance to a furnace room and the furnace, is a disconnecting switch required?

No, the over current device can act as a switch.

12

How many outlets are typically allowed on a 15A branch circuit?

12

13

Who must buy the equipment for a unit substation?

The building owner.

14

What is askarel?

A trade name for oil containing PCBs;

We do not use this anymore and are required to replace it.

15

What determines whether equipment should be installed in a vault, as opposed to a service room?

Amount of liquid.

16

Conductors from transformers secondaries must have an ampacity of ________ of the sum of rated current.

125%

17

If a transformer feeder is suitably protected by an upstream overcurrent, is an individual primary overcurrent device required?

No, but we must include one on the secondary.

18

What table should be consulted when choosing overcurrents for a high voltage transformer secondary?

Table 50.

19

When sizing transformer overcurrents, generally we round __________ on table 13, unless otherwise stated.

Down.

20

Which transformers do not have overcurrent protection?

Current transformers.

21

What is the maximum fuse that can be placed on a potential transformer?

10 A (L.V.);

3 A (H.V.). 

22

What is another name for panelboard? Why are they different from switchboards?

A load center;

A switchboard is usually free standing and can often be accessed from the rear.

23

When a sub pump is installed in a alake, should it have GFCI protection?

Yes, but not Class A;

No more than 10 mA for 2.7 s.

24

How large is a typical Sub Pump?

7-13 cm in diameter;

60-120 cm long.