R2 LT2 Flashcards
Why do many electricians prefer not to use the push-in connection ports?
Less reliable and secure connection
What is the required distance between kitchen counter receptacles according to Figure 3?
Maximum 900 mm
How are non-current-carrying metal parts of a switch frame bonded if no bonding terminal is provided?
By means of attachment screws.
What may cause the terms of approval for electrical equipment to be broken?
Not installed according to manufacturer’s instructions
Where are rules for installing receptacles on rooftops covered?
Rule 26-710
Are there often changes made to locations of devices during construction?
Yes
What requirement does 26-724(f) set for hallway receptacles in dwelling units?
No point in the hallway more than 4.5m from a receptacle
What specific requirements does the CEC give for replacing old two-prong non-grounding receptacles with new three-prong grounding-type receptacles?
Very specific requirements.
What type of device boxes and cable may be used in a wood-frame structure for receptacles and switches?
Plastic boxes, non-metal sheathed cable
What does the CEC prohibit in the work surfaces of kitchen counters?
Receptacles facing upwards
Which rule in the CEC dictates the installation of three-way switches for stairwell lighting?
Rule 30-504
What type of protection must receptacles within 1.5m of sinks, bathtubs, and shower stalls have?
Class A GFCI
What type of device boxes and cable may be used in a concrete and steel-stud structure for receptacles and switches?
Metallic boxes, armored cable
Where does the CEC specify the location of the switch for lights in an unfinished basement?
Rule 30-506
Where can you find guidelines for locating receptacles required for clothes dryers and electric ranges in dwelling units?
CEC rule 26-744
What type of conductors are most receptacles and switches rated for use on?
Copper or copper-clad solid conductors
How should the hot or switch-leg be terminated on a four-way switch?
Darker-coloured terminal
Where should switches generally be located?
Close to the door and on the inside of the room
Which rules should be consulted for governing the branch circuitry in residential occupancies?
26-650 through 26-656
What should be ensured about the size of conductors terminated on the device?
Within the range specified by the manufacturer
Where should switches be placed when it is impractical to place them inside the room?
Directly outside the room, beside the door
What wire sizes are most devices limited to?
14 to #12AWG
What do CEC rules 26-720, 26-722, 26-724 and 26-726 specify about receptacles?
Locations, loads provided, and prohibited locations
What are some possible ways to terminate general-use receptacles and switches?
push-in ports, side-mounted screws, screw-down compression terminals
What color terminal is used for ungrounded conductors?
Brass
What is the preferred method of termination for many electricians?
Wrapping the conductor under the screw terminal or using the screw-down compression terminal
What color terminal is used for the identified/neutral conductor?
Silver
What can happen if you install or use equipment in ways contrary to the manufacturer’s instructions?
Void warranty
What letters indicate hot terminals?
X, Y, Z
What considerations must be addressed when installing switches and receptacles?
Wiring Methods
Who predetermines the locations of receptacles and switches in installations?
Architects and electrical engineering firm
Who is often responsible for determining layout when there are no electrical plans for an installation?
Electrical contractor
In what type of construction is it common for the electrical contractor to determine layout without electrical plans?
Single-family detached residential
What is the requirement for receptacles in child care facilities according to 26-706(1)?
Must be tamper-resistant
What requirement does 26-710 set for rooftop receptacles?
GFCI Class A protected, CSA configuration 5-20R
What protection is required for outdoor receptacles installed within 2.5m of finished grade in residential occupancies?
GFCI Class A protected
What must the wiring method used to supply receptacles and switches abide by?
Bonding requirements of Section 10 of the CEC
What does CEC rule 10-612(6) require electricians to do when installing devices?
Bond the devices to prevent disruption of bond system
What considerations should be taken when terminating devices like general-use receptacles or switches?
Check compatibility with wiring, especially if aluminum or stranded conductors
How can the top of general-use switches be identified?
Stamp on the mounting frame
What should be used to terminate the device if aluminum or stranded wiring has been run to the device box?
Solid copper conductor pig-tails
In most installations, how are other non-locking receptacles installed?
Ground slot oriented downward
What does CEC rule 30-320 pertain to?
Installing light switches in bathrooms or damp locations
Why is it important to use appropriately installed pig-tails of solid copper conductor?
To terminate the device
Where are receptacles in hospitals often required to be oriented differently than usual?
Ground slot upward
Where in the CEC can you find the requirements for the location and spacing of receptacles when not specified in an electrical plan?
CEC rules 26-720, 26-722, 26-724 and 26-726
Why would it be necessary to pigtail appropriately sized jumpers to terminate on the device?
larger wire size for voltage drop
When are twistlock receptacles required according to CEC?
Facing downward, rated 30A or more
What does 26-720(m) require in public corridors and stairways of multi-unit residential occupancies?
Duplex receptacle every 10m
What should be ensured when terminating conductors using any method?
Conductors are not stripped too long
How do homeowners sometimes incorrectly terminate traveller sets on a switch?
One on black and one on brass-terminal
What convention do receptacles use to ensure correct polarity?
Terminal colour-coding
What does rule 30-500 require for each entrance?
Light fixture with a switch inside
What is the maximum spacing between receptacles in dwelling units according to 26-724(a)?
3.6m
How can electricians achieve preventing a disruption of the bond system when installing devices?
Pigtail the bonding conductor for each device
What does the marking on general-use switches help ensure?
Turning the load on in the up position and off in the down position
What is required by CEC rule 26-744(6) (c) for non-locking receptacles used for electric ranges?
U-ground slot oriented to either side
What do the darker-coloured terminals on a four-way switch signify?
Fixed pole common
