Wiring Methods #1
What is the term used in the CEC to describe any channel designed for holding wires, cables or bus bars?
Raceway
What is the term for the point in the wiring installation at which current is taken to supply utilization equipment?
Outlet
Which table provides the minimum bend radius for conduit and tubing?
Table 7
Which table lists the number of conductors determining box fill?
Table 23
12-3034
What table would you use to determine the allowable ampacity for insulated conductors of Class 2 circuits?
Table 57
Section 12 of the CEC deals with wiring methods for installations of _____ V or less.
750
12-000
What is the minimum thickness of concrete slab at grade level to permit raceways to be installed directly beneath it?
100mm
12-012 8)
The maximum number of bends in a conduit must not exceed _____ degrees.
360
12-942What is the maximum number of outlets that may be installed on a 15A branch circuit in a dwelling unit where the breaker is rated for 80%?
12
8-304
What table would you use to determine what cables may be used for Class 1 & 2 circuits?
Table 19
What is the smallest size of rigid conduit that may be used in an electrical installation?
16
12-1004
What is the maximum spacing between the points of support for a single 16 trade size rigid PVC conduit?
0.75m
12-1114
What is the maximum number of conductors that may be installed in a conduit?
200
12-910
When calculating box fill, 3 marettes/splice caps would be equivalent to how many insulated conductors?
1
Recall it is 1 conductor per PAIR of marettes (12-3034)
The overcurrent protection requirements of a Class 2 circuit can be met for a 30V circuit if the current is limited to _____ A.
100VA / 30V = 3.33A
16-200
What is the largest size SOLID conductor that may be pulled into conduit?
#10
12-914
The minimum bending radius of armored cables is _____ times the external diameter of the cable.
6
12-614
NMSC shall not be used where voltage between any 2 conductors exceeds _____ V.
300V
12-502
What is the minimum length of free conductor to be left at every outlet box?
150mm
12-3000 6)
What is the maximum rating of fuse allowed for the protection of a Class 1 circuit where #16 AWG conductors extend beyond the equipment enclosure?
10A
16-104
If junction boxes are placed in attic spaces, what is the minimum vertical access height?
900mm
12-3014
What does NMWU stand for as it pertains to cables?
Non Metallic Wet Underground
What is the maximum number of #12 AWG, 600V, RW90XLPE stranded, unjacketed conductors in a 78 trade size EMT?
Table 10 -> 11.61mm2 per conductor
Table 9G -> assume 40% fill -> 2280.49
2280.49/11.61 = 196 conductors
What is the correct method of terminating aluminum conductors to binding terminal screws?
End of the conductor wrapped 3/4 around the screw in a clockwise direction.
12-118 6)
Name the 3 types of Class 1 circuits.
Remote control circuits, signal circuits, extra-low-voltage power circuits
16-000