Across which thermostat subbase terminals should a jumper be placed to check indoor fan operation?
a. R to C
b. R to Y
c. R to W
d. R to G
d
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As shown in Fig. 12.72, a three-phase four-wire line with a phase voltage of 120 V rms, with a positive phase sequence, supplies a balanced motor load at 260 kVA at 0.85 pf lagging. The motor load is connected to the three main lines marked a, b, and c. In addition, incandescent lamps (unity pf) are connected as follows: 24 kW from line a to the neutral, 15 kW from line b to the neutral, and 9 kW from line c to the neutral.
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The specific enthalpy lines:
A) Run horizontally from the left to right. B) Run diagonally from right to left. C) Run vertically from top to bottom. D) Run diagonally from left to right.