CIRCUIT CONTROL DEVICES
Upon completion of this chapter you will be able to:
State three reasons circuit control devices are used and list three general types of circuit control
Identify the schematic symbols for a switch, a solenoid, and a relay.
State the difference between a manual and an automatic switch and give an example of each.
State the reason multicontact switches are used.
Identify the schematic symbols for the following switches:
State the characteristics of a switch described as a rocker switch.
State the possible number of positions for a single-pole, double-throw switch.
Identify a type of momentary switch.
State the type of switch used to prevent the accidental energizing or deenergizing of a circuit.
State the common name for an accurate snap-acting switch.
State the meaning of the current and voltage rating of a switch.
State the two types of meters you can use to check a switch.
Select the proper substitute switch from a list.
State the conditions checked for in preventive maintenance of switches.