Drawing & Basic Circuits Flashcards
Describe a Normally Open Pushbutton:
Momentary contact device that closes when pressed
Describe an Overload Heater:
Opens a set of contacts at a predetermined temperature or thermal level
Describe a Solenoid:
Electromagnetic actuating device
Is a two-position selector switch an example of a momentary or maintained switch?
A Maintained contact switch
The four basic types of Electrical drawings are:
Block, Wiring, Schematic and Interconnection
Block diagrams show conceptual relationships between equipment or between systems. The relationship between equipment or systems may be described as
Physical - showing difference in elevation
Hierarchical - showing speed of response
Typical - showing how types of components are related in an installation
Schematic Diagrams are sometimes called?
Elementary Diagrams
IEC-Style Schematic drawings are presented in a horizontal or a vertical layout?
Vertical
Termination schedules or pin-out diagrams can be categorized as what sort of diagrams?
Interconnection
Which type of drawing would be most useful to determine on which floor of a high-rise building to install a particular panelboard?
Block Diagram
Numbers located along the right-hand side of a NEMA horizontal rung schematic diagram indicate the:
Contact location
A schematic diagram representing a stop/start control circuit for a motor has three basic sections. These are:
Stop circuit
Start circuit
Holding circuit
The effect of the interlock contacts depends upon their _________ in the control circuit
Location
Contacts connected in the holding circuit affect the ___________ of the motor
Running
How is a start button contact connected with respect to the stop button contact?
Connected in SERIES
