A1 LT14

Question 1

How does the CEC define low voltage?

Answer 1

Voltages from 31 V to 750 V inclusive

Question 2

What does NMSC stand for?

Answer 2

Non-metallic sheathed cable

Question 3

What does MI cable stand for?

Answer 3

Mineral-insulated cable

Question 4

What is a flexible cord or cable?

Answer 4

Made flexible by incorporating fine wire strands

Question 5

What is a typical electrical rating for splitters?

Answer 5

400 A, 800 A, 1200 A, 1600 A

Question 6

What does a bus network provide power to?

Answer 6

Modular motor-starter units

Question 7

What is classified as extra-low voltage according to the CEC?

Answer 7

Operating at 30 volts or less

Question 8

What is the outer sheath of NMSC cable made of?

Answer 8

non-metallic (usually plastic)

Question 9

What is an armoured cable?

Answer 9

Contains metal armour sheath

Question 10

What are the voltage limits for LWMI and MI cables?

Answer 10

LWMI: up to 300 V, MI: up to 600 V

Question 11

Where are flexible cords usually used?

Answer 11

Pendant and portable equipment

Question 12

What does power wiring typically involve?

Answer 12

Distribution of electrical energy within buildings

Question 13

What voltage is a remote-control wiring system commonly used in lighting circuits?

Answer 13

24 V

Question 14

What is the voltage limit for NMSC cable?

Answer 14

300 V

Question 15

Where is armoured cable commonly used?

Answer 15

Open wiring with mechanical abuse

Question 16

What is Type DRT cable?

Answer 16

Twisted assembly of four coloured insulated conductors

Question 17

In the CEC, what are low energy control circuits and methods of wiring them often described as?

Answer 17

Class 2 circuits

Question 18

What is the maximum voltage rating of Type DRT cable?

Answer 18

300 V

Question 19

What is the construction of TECK 90 cable made of?

Answer 19

PVC covering, insulation, grounding conductor, interlocking armour

Question 20

What is a heater cord typically used for?

Answer 20

Connection to portable heating equipment

Question 21

What is the temperature rating of NMSC cable?

Answer 21

90C

Question 22

What are the three categories of NMSC cables based on installation conditions?

Answer 22

Type NMD90, Type NMW, Type NMWU

Question 23

What do branch circuits supply?

Answer 23

Lighting, receptacle outlets, heaters, dryers, ranges, motors

Question 24

What voltage may some motor control circuits operate at?

Answer 24

Up to 600 V

Question 25

Where is NMSC cable typically used?

Answer 25

buildings of combustible (wood frame) construction

Question 26

What are aluminum-sheathed cables commonly used for in industrial applications?

Answer 26

Circuits of 600 V to 5000 V

Question 27

What is the filler in mineral-insulated cables?

Answer 27

Magnesium oxide

Question 28

What is another name for MI cable?

Answer 28

Pyrotenax

Question 29

What are the key components of an MI cable?

Answer 29

Copper tube, Magnesium-oxide insulation, Copper rods

Question 30

What is the size range of the general-service cords?

Answer 30

No. 18 to No. 14 AWG

Question 31

Give examples of extra-low voltage circuits.

Answer 31

Doorbell or chime circuits, residential thermostat circuits

Question 32

What types of general-service cords are used for outdoor use?

Answer 32

Type SJOW (300 V) and Type SOW (600 V)

Question 33

What type of cable is typically used in residential wiring?

Answer 33

Non-metallic sheath (type NMD-90)

Question 34

What type of cable is typically used for extra-low voltage circuits?

Answer 34

Bell wire, two-conductor, twisted-pair cable in AWG sizes No. 16 and smaller

Question 35

What is another name for armoured cable?

Answer 35

BX

Question 36

What sizes do service cords typically range from?

Answer 36

No. 18 to No. 4 AWG

Question 37

How are communication and signal circuits defined in the CEC?

Answer 37

As extra-low voltage circuits using shielded conductors.