A pump station has a 10 kVA lighting load, one 3 hp. motor, two 5 hp motors and one 15 hp motor. All the loads are feeded from a delta 3 ph., 240 V source.
 
 

a) Draw a circuit representing the motors and lights connected to the source, including all the switches and over-current devices needed.
 
 

b) Find the load for each feeder and the protection devices rating.