Question

2. (10 points) A mnufacturing plant has a cooling pond located 3, 000 ft from the plant Six pumps are used to circulate water between the ponf and the plan I cold weather, however, the pumps can freeze and fail to supply water. The plant owner decides to connect electric-resistance heaters to each pump to prevent this proble The six heaters re connected to a stwo-conductor cable from the plant at a juction box. The heaters operate on 720V and have a total current dfraw of 60 A What size copper conductors should be used to supply power to the heaters, if the voltage drop at the Junction box is to be kept at 4% of the applied voltage? Assume an average ambient temperature of 20°C.

Answer 1