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Plumbing 4th Year 2021 BC CANADA > endorsment exam > Flashcards

Flashcards in endorsment exam Deck (19)
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1

maximimum voltage drop permitted to branch feeder

3%

2

one of the objectives of grounding and bonding is to limit AC circuit voltages to ground to

150v

3

for multi phase systems having one wire common to all phases the conductor to be grounded shall be

the identified neutral connector

4

maximum voltage between 2 conductors on a 2 wire branch circuit

300v

5

min distance nmsc from heating ducts

25mm or 1 inch

6

edge of lumber add loomex none mattalic cable min distance

32mm

7

m to floor withough protection on loomex nmd90

1.5m

8

Distance between supports for bx cable

1.5m

9

min distance for conductors to terminate outside of juction box

150mm or 6 inches

10

min thickness of wood to mount a sectional box to

19mm

11

plug fuses shall be rated not more than?

30 amps

12

CLASS 2 CIRCUIT limited to how many volts

100v

13

AWG size of class 2 thermostat wireing for forced air

#19

14

All electric power for a heating unit and associated equipment shall be obtained from

a single branch circuit for that purpouse only

15

maximum supply voltage for a safety circuit for gas appliance

120v

16

overload protection for manually started motors is not required when the motor is smaller than how many hp

1hp

17

a motor disconect shall be installed within what distance from the furnace

9m

18

how would you change the rotation of a three phase motor

all the above. change any leg

19

when calculating currants that will result from loads expressed in watts or volt amps or supplied by low voltage AC system. the voltage divisors that shall be used shall be

120/240