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____________________ forces one contactor to be de-energized before the other one can be energized.

Control transformers generally have screw terminals connected to the primary and secondary leads.

The continuous change of both amplitude and polarity of the magnetic field causes currents to be induced into the metal core material; these currents are called ____________________ currents.

In a three-wire start/stop motor control circuit, the Stop Button can be wired normally open or normally closed. For the circuit to operate properly, the Stop Button should be wired_____________________.

In schematics, electrical components are always shown in their energized or on state.

When a component is used to perform the function of start it is generally normally ____________________.

Diodes are used to suppress the voltage spikes produced by coils that operate on direct current.

Figure 8-1 The accompanying figure shows the addition of a(n) ____________________ button to the circuit.

Inching control requires the use of a separate ____________________ because the power supplied to the motor must be separate from full line voltage.

When one side of the control transformer is not grounded, it is generally referred to as a(n) ____________________ system.