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NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
DISTRIBUTION WITHOUT PERMISSION FROM UL
c) Welded, sonically welded, solvent cemented, or provided with tongue and groove joints and
seams; or
d) Encapsulated (potted); or
e) Conformally coated with a compound that complies with the Standard for Polymeric Materials
– Use in Electrical Evaluations, UL 746C, and with the intended application.
7.2 effective April 13, 1993
7.3 All openings used for cords, leads, bushings, connectors, and the like shall be constructed to preclude
entry of dust or other contaminants.
7.3 effective April 13, 1993
7.4 Gaskets intended to provide tight fitting joints, doors, and covers for a protected environment
enclosure shall comply with the Gasket Tests, Section 50.
7.4 effective April 13, 1993
7.5 Potting shall be used within its temperature rating. Prior to potting, all parts shall be mechanically
secured.
7.5 effective April 13, 1993
8 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts
8.1 General
8.1.1 An uninsulated live part, film-coated wire, or moving part, that could result in a risk of electric shock
or injury to persons shall be located or enclosed so that unintentional contact is precluded.
8.1.1 effective April 13, 1993
8.1.2 An opening in the enclosure of a converter or inverter that will not permit entrance of a 3/4 inch
(19.1 mm) diameter rod is acceptable if a probe as illustrated in Figure 8.1 cannot be made to touch any
uninsulated live part, film-coated wire, and moving part, that could result in a risk of electric shock when
inserted through the opening.
8.1.2 effective April 13, 1993
DECEMBER 14, 1993 UL 458 17
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