RELAYS
N.O.H.C.
WHAT IS NORMALLY OPEN HELD CLOSED
Only one per line
What is a load?
Deduct for 3/4'' EMT
What is 6 inches
Operates when fluid movement is detected
What is a flow switch?
Definitions location
What is article 100
SPDT-SB
What is Single pole, double throw, single break
How we label the neutral wire in our drawings.
What is the number 2?
The most commonly used conductor material
What is Copper?
Turns off a compressor when it reaches setpoint
What is a pressure switch?
The Grounded conductor insulation color
What is White or Grey?
A heavier duty relay
What is a contactor
In the cross reference I'm underlined
What are normally closed contacts?
The direction of travel is identified by a dot when drawing this device.
What is a joy-stick?
Device used with HAND-OFF-AUTO logic application
What is a three position switch?
The Grounding conductor insulation color
What is Green or Green with yellow stripe?
Solenoid action
How do contacts switch in an electromechanical relay?
Sometimes called a "Three wire circuit"
What is a Memory Circuit?
Used on a hand bender, the mark to line up for the 45 degree angle on a 3 point saddle.
What is the notch?
Only a float switch is used to start a pump in this type of circuit.
What is Two Wire or Automatic circuit?
Only limited to 40%
What is total area of conductor fill in a raceway? (three or more conductors)
Other than the environment this causes EMR contacts to fail.
What is Arcing?
This identifies that contacts are mechanically connected
What is a dashed line?
One P.S.I is equal to this many inches of water column
27.68 inches
The amount of pressure that needs to be removed before the switch resets.
What is dead band?
Being familiar with the tables and charts and definitions in the NEC.
What are things that will help you pass your test?