1.- What are the advantages of the three-phase power?
 
 
 

2.- In a WYE connection, if the phase voltage is 120 Volt. Calculate the line voltage.
 
 
 

3.- Calculate the power dissipated by a three-phase load for V_ph = 120 Volt and R_L = 50 ohms.
 
 
 

4.- Enumerate three types of motors.
 
 

5.- The greatest allowable voltage drop for a 1 hp, 120 V, 3 hp motor is 10% of the name plate. The motor is located 250 ft. apart from the panel. Find the needed wire.
 
 

6.- The NEC requires that motors shall be supplied by branch circuit conductors having _________% of full-load current.
 

7.- Find the circuit conductors supplying a 20 hp, 230 V, 3 hp squirrel-cage motor.
 
 
 

8.- Three resistive balanced loads are connected to a 480 Volt (line voltage), 3-phase circuit.
What is the total power of the circuit in kW for a 40 Amp current?
 
 
 

9.- In a motor nameplate, the label FLA means ______________________________.

10.- In a motor nameplate the label SF means _______________________________.