Service & Grounding 1
The depth to which the conductors must be buried needs to be considered. True or False?
True. 6-300, 12-012
When a service box is placed within a building, it shall be located as close as practicable to the point where the consumer service conductors enter the building. True or False?
True
Rule 6-206
What is the CEC definition of ampacity?
The current-carrying capacity of electric conductors expressed in amperes.
Section 0
A single dwelling has a living area of 92 m2, exclusive of the area below the ground floor. What is the minimum ampacity of the service conductors?
100A
Rule 8-200 1) b)
When determining the living area of a house, how is the basement area taken into consideration?
75% of the basement area (based on inside dimensions)
Rule 8-110
What is the minimum headroom clearance where service boxes may be installed?
2.0m
Rule 6-206
What 2 materials can a grounding conductor be made of?
Aluminum or copper
Rule 10-112
The calculated load for a single dwelling with a main floor area of 80 m2 is 15,600W. What is the minimum ampacity of the service conductors based on 8-200 1) b)?
100A
A single dwelling has a main floor area of 85 m2 and a calculated demand of 13920W. What is the minimum ampacity of the service conductors?
100A
Rule 8-200 1) b)
What is the voltage divisor used to calculate the service load current when the supply is 120/240V single-phase?
240V
Rule 8-100
What is a ground?
A connection to earth obtained by a grounding electrode.
Section 0
What is a bonding conductor?
The conductor that connects the non-current carrying parts of electrical equipment, raceways, or enclosures to the service equipment or service grounding conductor
Section 0
A single-story, single dwelling with a FULL BASEMENT has inside dimensions of 9.4m x 14.3m. What is the living area used for calculating the basic load?
235.235 m2
When calculating the load for a single dwelling, what is the demand factor of a hot tub heater?
100%
Rule 8-200 1) a) v)
What is the circuit extending beyond the final overcurrent device called?
Branch circuit
Section 0
What is the minimum size of grounding conductor for a single dwelling with a 100A circuit breaker installed in the service box?
No 6 AWG copper
Rule 10-114
What is the minimum clearance of exposed service conductors which are installed beside windows or doors?
1m
Rule 6-112
When installing a new electrical service in a single dwelling, how many blank spaces shall be left in the panelboard to provide for future equipment?
4
Rule 8-108
When calculating the minimum size of a SERVICE conductor, what is the demand load of a 16kW range?
7.6 kW
6000 + 0.4(4000)
Rule 8-200
When calculating the load for a single dwelling, what is the demand factor of a water heater with a tank that is rated in excess of 1500W? (an electric range has been provided for)
25% of the rating
Rule 8-200 1) a) vii)
What is the minimum nominal trade size of consumer's service conduit?
21
Rule 6-306
What table is used to determine the size of the field-installed bonding conductor?
Table 16
Rule 10-614 3)
What is the maximum continuous load of a 50A circuit breaker if NOT marked for 100% continuous operation? All terminations and connections are rated at 75C.
40A
Rule 8-104
What is the minimum size branch circuit conductor (copper) for a 240V, 8200W swimming pool heater that may run continuously for several days at a time? All equipment and terminations are rated at 60C.
#6 AWG copper
8200/240 = 34.167A
Apply 80% derating to get 42.708A
Table 2 - 60C column - #6 AWG
Rule 8-104, 4-004
When calculating the minimum size of a BRANCH conductor, what is the demand load of a 16kW range?
9.6kW
8kW + 0.4*4kW
Rule 8-300 1)