NEC (National Electric Code) (USA) Universal set of standards governing proper
electrical installation
Neutral When measure using a multi-meter will measure 0 to earth
ground
NFPA (National Fire Protection Association) (USA) Develops national safety
standards for fire protection related to all types of material
Owner's Manual Booklet supplied with each unit containing information about
installation, operation, and care of the unit
Pump
Electro-mechanical device to move water, consisting of a wet
end and a motor
RCD (Residual Circuit Device) Device that disconnects a circuit wherever it
detects that flow of current is not balanced between the phase
(“hot”) conductor and the neutral conductor. Similar to a GFCI
in the USA. RCD breakers are used outside the US and
Canada
Suction Fitting Located at the bottom of a hydro massage tub, used to return
water back into the pump. Must be installed before use of a
hydro massage bathtub and correctly working at all times
TUV
Independent testing laboratory for Germany and European
standards
UL (Underwriters Laboratory) (USA) Nationally recognized testing laboratory that
develops standards for safety for various products
120@60Hz VAC (USA) Most common residential voltage. VAC delivered to
customers using three conductors with the following color code
and voltage:
Line (L) = 110-120 VAC (Black or “Hot”)
Neutral (N) = (White)
Ground (G) = (Green)
220@60Hz VAC (USA) Required voltage for large ampere equipment such as
residential electric ovens, electric water heaters, and hottubs.
Some large appliances require the use 110VAC for control or
other peripheries in this case a neutral is required
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