maintained contact versions, and may also have a
center OFF position.
Double-Pole, Single-Throw (DPST) Switch
A switch that makes or breaks the connection of two
circuit conductors in a single branch circuit. This switch
has four terminal screws and ON/OFF markings.
Some motors can operate on two different voltages,
depending upon how it is built and connected. The
voltages are either multiples of two or the 3 of one
The terminal in electric apparatus that conducts
An electrical resistance assembly used to create heat
Part of the refrigeration system where refrigerant
vaporizes and absorbs heat from water flowing over the
front of the evaporator plate, turning it to ice.
A metering device which reduces the pressure of the
liquid refrigerant flowing into the evaporator, causing it to
boil and absorb heat.
Filters liquid refrigerant, keeping system dean. Desiccant
traps small quantities of moisture, keeping the system
dry. Must be replaced any time the refrigeration system
A deployable system of shelters and services which can
be prepositioned and quickly set up in any theater of
GFCI or GFI (Ground Fault Circuit Interrupter)
A specific type of circuit protection (commonly required
in kitchens & bathrooms) that helps safeguard against
shocks. GFCI protection can come from an outlet or a
Ground or Grounding
Connecting one side or neutral of a circuit to the earth
prevent transmitting shocks to personnel.
Hot Gas Valve
Solenoid valve which Is energized during defrost
allowing hot gas refrigerant to enter the evaporator(s),
warming it to break the bond of the ice slab to the
Real power delivered to a load (W x 1,000 VA).