Mechanical Assembly; Protection Against Corrosion - Century UL 1086 Manual

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9 Mechanical Assembly

9.1 An appliance shall be assembled so that it will not be adversely affected by the vibration of normal
operation. Brush caps shall be tightly threaded or otherwise intended to prevent loosening.
9.2 A switch, a lampholder, a motor-attachment plug, and similar components shall be mounted securely,
and shall be prevented from turning or shifting. See 9.3.
Exception No. 1: The requirement that a switch be prevented from turning may be waived if all four of the
following conditions are met:
a) The switch is a plunger or other type that does not tend to rotate when operated – a toggle
switch is considered to be subject to forces that tend to rotate the switch during intended
operation of the switch;
b) The means of mounting the switch makes it unlikely that operation of the switch will loosen
it;
c) Spacings are not reduced below the minimum acceptable values if the switch does rotate;
and
d) Intended operation of the switch is by mechanical means rather than direct contact by
persons.
Exception No. 2: A lampholder in which the lamp cannot be replaced, such as a neon pilot or indicator
light in which the lamp is sealed in a nonremovable jewel, need not be prevented from turning if rotation
cannot reduce spacings below the minimum acceptable values.
9.3 The means for preventing the turning mentioned in 9.2 is to consist of more than friction between
surfaces – for example, a properly applied lock washer, is an acceptable means for preventing a small
stem-mounted switch or other device having a single-hole mounting means from turning.

10 Protection Against Corrosion

10.1 All surfaces of iron and steel parts shall be protected against corrosion by enameling, galvanizing,
plating, or other acceptable means.
Exception No. 1: Bearings, balance weights, laminations, or minor parts of iron or steel, such as washers
or screws.
Exception No. 2: Other parts of iron or steel if corrosion of such parts would not be likely to result in a risk
of fire, electric shock, or injury to persons.
HOUSEHOLD TRASH COMPACTORS - UL 1086 JANUARY 6, 2004