R2 LT1

Question 1

What switch design is largely preferred in bigger commercial and industrial installations where line voltage switches are used?

Answer 1

Toggle design

Question 2

What does the term ‘grade’ refer to in switches?

Answer 2

Different levels of quality

Question 3

What is the continuous current rating of most 20A switches?

Answer 3

16A

Question 4

What does the R in R-2 refer to?

Answer 4

Receptacle

Question 5

What are some variations of receptacles within the specification grade?

Answer 5

Commercial, construction, industrial, heavy-duty

Question 6

How can you recognize isolated ground receptacles?

Answer 6

Green triangle on face

Question 7

What is the key difference between a 15A and 20A receptacle?

Answer 7

Slot shape

Question 8

What type of switch is most suitable for a 240V single-phase load where all live conductors are interrupted?

Answer 8

c. DPST

Question 9

What are some variations within the specification grade of switches?

Answer 9

Commercial, construction, industrial, heavy-duty

Question 10

How many terminals does a double-pole, double-throw (DPDT) switch have?

Answer 10

Six

Question 11

What is the maximum voltage rating for L5-15R receptacles?

Answer 11

125V

Question 12

What is the third grade of receptacles manufactured for?

Answer 12

To meet demanding requirements of hospital grade

Question 13

What additional features may general-use switches include in their design?

Answer 13

Pilot lighting, dimmer function, motion-sensing capabilities

Question 14

How many activation cycles are most certified electrical specification grade switches able to provide?

Answer 14

Thirty to fifty thousand

Question 15

What does SPST stand for in switch terminology?

Answer 15

Single Pole Single Throw

Question 16

What does a SPST switch’s actuator positions indicate?

Answer 16

ON or OFF

Question 17

What is rotary activation?

Answer 17

Turning knob to activate mechanism

Question 18

Which certification bodies are commonly found on switches sold in Canada?

Answer 18

CSA Group, UL, ULC

Question 19

What does DPDT stand for?

Answer 19

Double Pole Double Throw

Question 20

What ratings do general-use switches have?

Answer 20

Voltage, ampacity, horsepower

Question 21

How are switches classified?

Answer 21

By their number of poles and throws

Question 22

What is an SPST switch used for?

Answer 22

Simple on-off control of a single load

Question 23

What are some example styles of general-use switches?

Answer 23

Doorjamb-mounted, pull-chain, key-locking, push-button

Question 24

What is a DPDT switch equivalent to?

Answer 24

Two SPDT switches

Question 25

How do general-use toggle switches activate?

Answer 25

Move handle up or down

Question 26

What does the 15 in L5-15R refer to?

Answer 26

15A

Question 27

What are the two styles in which fifteen- and twenty-amp non-locking receptacles are manufactured?

Answer 27

Standard style and decorator style

Question 28

Why are specification grade devices more reliable?

Answer 28

Robust and longer service life

Question 29

How can the hospital grade receptacles be identified?

Answer 29

By a green dot on the face

Question 30

What is the purpose of isolated ground receptacles?

Answer 30

Supply sensitive electronic equipment

Question 31

What is the shape of the slot for the identified conductor on a 15A receptacle?

Answer 31

Vertical

Question 32

What is the shape of the slot for the identified conductor on a 20A receptacle?

Answer 32

T-slot

Question 33

What is a key consideration with switches that have additional features like pilot lighting, dimmer function, and motion-sensing capabilities?

Answer 33

That the conductor is identified at the switch location

Question 34

Where are residential grade switches generally used?

Answer 34

Residential installations

Question 35

What CEC rule limits circuit loading to 80% of the rating of the overcurrent device?

Answer 35

CEC rule 8-104

Question 36

Describe the activation method for Decora style switches.

Answer 36

Acts like a see-saw

Question 37

Why do switch manufacturers limit the use of their devices to 80% of the marked ampacity?

Answer 37

Because the majority of circuit protection devices are not marked for continuous operation at their full ampacity.

Question 38

What are some other activation methods for switches mentioned in the text?

Answer 38

Pull-chain, key, doorjamb

Question 39

What must electrical equipment bear to show it has met safety standards in Canada?

Answer 39

Evidence of Approval

Question 40

Why is it important to verify the electrical ratings of switches?

Answer 40

Ensure safe use within intended circuit

Question 41

Why are switches intended to be installed within an enclosure?

Answer 41

Kept dry and free of dust

Question 42

What does 'throw' mean in switch terminology?

Answer 42

The number of positions of the switch actuator