Switches - Century UL 1086 Manual

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16.5 Each motor in an appliance shall be provided with overload protection consisting of one of the
following:
a) Thermal protection complying with the applicable requirements in the Standard for Thermal
Protectors for Motors, UL 547.
Exception No. 1: If the time required to operate a manually reset protective device through 10
cycles of operation is longer than the time that the product is likely to be operated during each
use, the number of operations of the device for the temperature test under locked-rotor conditions
may be less than 10 cycles but shall not be less than 4 cycles.
Exception No. 2: A motor intended to move air only, by means of an air-moving fan that is
integrally attached, keyed, or otherwise fixed to the motor, is required to have locked-rotor
protection only.
Exception No. 3: A shaded-pole motor with a 2:1 or smaller ratio between locked-rotor and
no-load currents and a 1-ampere or smaller difference between no-load and locked-rotor currents
is required to have locked-rotor protection only.
b) Impedance protection complying with the applicable requirements in the Standard for
Impedance-Protected Motors, UL 519, when the motor is tested in the appliance under
locked-rotor conditions.
c) Other protection that is shown by test to be equivalent to that described in (a).

17 Switches

17.1 A switch shall be acceptable for the application, and shall have a current and voltage rating not less
than of the load that it controls when the appliance is operated normally.
17.2 In an appliance rated 125 or 125/250 volts (3-wire) or less, a switch or an overcurrent-protective
device of the single pole type other than an automatic control without a marked off position, such as a
protective device inherent in a motor, shall be electrically connected to a terminal or lead intended for
connection to an ungrounded conductor of the supply circuit.
17.3 In applying the requirements in 17.1 to a switching device controlling a motor, the rating of the
device shall not be less than the rating of the motor. See 41.1. A switch that controls an inductive load,
such as a fluorescent-lamp ballast or a transformer, is ordinarily acceptable without test if the current
rating is not less than twice the rated full-load current of the ballast or transformer.
17.4 A switch shall be located or protected so that it will not be exposed to mechanical damage during
normal use.
17.5 A switch that controls a medium-base lampholder of other than a pilot or indicating light shall be
acceptable for use with tungsten-filament lamps.
17.6 A manually operable motor-control switch shall be provided in a portable appliance employing a
motor rated more than 1/3 horsepower. See 16.4.
HOUSEHOLD TRASH COMPACTORS - UL 1086 FEBRUARY 1, 1996