Electrical Insulation - Century UL 1086 Manual

24
Nominal wall thickness of insulation
Insulation
Thermoplastic or
neoprene
Rubber
Cross-linked
synthetic polymer
a The wall thickness may be not less than 1/64 inch (0.4 mm) if the wire is provided with a braid or jacket not less than 1/64
inch thick.
b For heat-resistant rubber, other than a silicone type, the wall thickness is to be not less than 3/64 inch (1.2 mm) and no braid
is required.
13.16 Aluminum conductors, insulated or uninsulated, used as internal wiring, such as for interconnection
between current-carrying parts or as motor windings, shall be terminated at each end by a method
acceptable for the combination of metals involved at the connection point.
13.17 With reference to 13.16 a wire-binding screw or a pressure wire connector used as a terminating
device shall be acceptable for use with aluminum under the conditions involved – for example,
temperature, heat cycling, vibration, and the like.
13.18 A nominal 0.110-, 0.125-, 0.187-, 0.205-, or 0.250-inch-wide quick-connect terminal shall comply
with the Standard for Electrical Quick Connect Terminals, UL 310. Other sizes of quick-connect terminals
shall be investigated with respect to crimp pull-out, engagement-disengagement forces of the connector
and tab, and temperature rises. All tests are to be conducted in accordance with UL 310.

14 Electrical Insulation

14.1 An insulating washer, bushing, and the like, and a base or support for the mounting of a live part
shall be of a moisture-resistant material – such as porcelain, phenolic or cold-molded composition, or
other material that is acceptable for the application – that will not be adversely affected by the
temperatures to which it will be subjected under conditions of actual use.
14.2 Insulating material is to be judged with respect to its acceptability for the application. Materials such
as mica, some molded compounds, and certain refractory materials are usually acceptable as the sole
support for live parts; and some other materials that are not acceptable for general use, such as asbestos
and magnesium oxide, may be accepted if used in conjunction with other insulating materials or if located
and protected so that mechanical damage and the absorption of moisture are prevented. If an
investigation is necessary to determine whether a material is acceptable, consideration is to be given to
its mechanical strength, dielectric strength, insulation resistance, heat-resistant qualities, the degree to
which it is enclosed or protected, and any other features that have a bearing on the risk of fire, electric
shock, and injury to persons involved, in conjunction with the conditions of normal service.
HOUSEHOLD TRASH COMPACTORS - UL 1086
Characteristics of internal wiring
Inch (mm)
1/32 a
(0.8)
1/32 b
(0.8)
1/64 (0.4)
Table 13.1
Braid or jacket
required
No a
Yes b
No
FEBRUARY 1, 1996
Nominal thickness of braid or jacket
Inch (mm)
–
1/64 b
(0.4)
–
–
–