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22 terms

NATE: Wiring Layouts & Electrical Diagrams

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On a forced-air furnace, what loads are commonly energized with a 120 volt power supply
The induced draft motor, indoor blower motor, and transformer's primary winding
What is the proper method for connecting any electrical wires located in a junction box
Twisting together and connecting with a wirenut
On split-system condensing unit, what loads are commonly energized with 240 volt power supply
Compressor, crankcase heater, and condenser fan
On HVAC package unit, what loads are commonly energized with 240 volt power supply
Condenser fan, induced draft motor, compressor, and indoor air blower
What is the control transformer output voltage for a residential split system
24 volts
What is the control transformer input voltage for a residential split system
120 volts
What is the control transformer input voltage for a HVAC package system
208/240 volts
What is the purpose of a schematic diagram
It shows technician the operational sequence of the system
What do the vertical lines represent in electrical schematic diagram
The power supply to the system
What do the horizontal lines represent in an electrical schematic diagram
The individual circuits in the electrical system
A legend is used
To identify the label of an electrical component
The top portion of an electrical schematic is commonly
The line voltage circuit
The bottom portion of an electrical schematic is commonly
The control voltage circuit
What component is located between the high-voltage circuit and the low-voltage circuit
The transformer
A pictorial diagram is used to
Show the actual wiring and location of system components
What diagram is also known as a label or line diagram
A pictorial diagram
What diagram consists of an electrical schematic and a pictorial diagram
A factual diagram
What diagram displays the system's fuse size and wire size, and shows placement of thermostat and power wiring
The installation diagram
The heavy dashed lines on an installation diagram show
The line voltage field wiring
The heavy solid lines on an installation diagram show
The line voltage factory wiring
The light dashed lines on an installation diagram show
The low voltage field wiring
The light solid lines on an installation diagram show
The low voltage factory wiring