A 1kW single phase electrical motor is used as part of a lift system to hoist and deliver 4 ton of bricks per hour at a building site. If the supply is 230V at the basement of the lift with the dumping floor level 65m higher, calculate the following:
1. The percentage volt drop before the load is dumped.
NOTE: Take the motor p.f. as 0.9 with a hoist speed of 100r/min through the reduction gearbox when fully loaded. Use a 3 core PVC armoured copper cable of 4 mm square for the entire installation.
2.The resistance of the ECC
3.The touch voltage at the motor if a 5 amp circiut-breaker is used.
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