- Read p. 42 to 46
- Study diagram on p. 66
- Read p. 76 ("How snap switches work . . .") to p. 84
- Read p. 98 to p. 107 (stop at "Reducing Voltage Drop")
- For a single-phase, 60 Hz motor, how many pushes does the rotor receive each second? ________________
- For a three-phase, 60 Hz motor, how many pushes does the rotor receive each second? ________________
- Can a three-phase motor be run with only three wires going to it? Yes or No.
- Is two-phase current widely used? Yes or No.
- Residential wiring uses three wires, red, black, and
white. Is this single phase, two phase, or three phase wiring?
______________
- For single-phase AC, what is the formula for volt-amperes? _______________
- For three-phase AC, what is the formula for volt-amperes? ________________
- If the volt-amperes is equal to the watts, what is the power factor? _______________
- What is the formula for power factor? ____________
- What is the formula for AC watts (taking power factor into account)? _____________
- What two methods are used to correct for low power factor at an installation? _______________
- Looking at the diagram on page 66, is a ground bonding screw used at the feeder panel? Yes or No.
- What type of wiring is used for ordinary wiring of lamps in a building, series or parallel? _____________
- If you needed to have four switches controlling one lamp,
- How many single-pole switches would you need? 0, 1, 2, 3, or 4
- How many three-way switches would you need? 0, 1, 2, 3, or 4
- How many four-way switches would you need? 0, 1, 2, 3, or 4
- Which type of insulation is moisture resistant, THHN or THWN? ____________
- Which can carry more current, 14 AWG wire or 12 AWG wire? _____________
- 6 AWG wire has four times the cross-sectional area of
12 AWG wire. Can 6 AWG wire carry four times the current of 12 AWG
wire? Yes or No.
- For wire running through an attic in Phoenix, would
the temperature correction factor result in a thicker or a thinner wire
than would be used in a cooler area? __________
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