UL-1682:2013 pdf free download – STANDARD FOR SAFETY Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type.
4.5.5 Attachment plugs
4.5.5.1 An attachment plug shall not be provided with more than one multiconductor cord-outlet hole.
4.5.6 Specific enclosures
4.5.6.1 An enclosure marked with one or more environmental enclosure type designations shall comply with the applicable requirements in Clauses 5.29 and 7.1.14.
4.6 Current-carrying parts
4.6.1 A current-carrying part shall be of silver, copper, a copper alloy, or other material acceptable for the application. Plated iron or steel shall not be used for parts that are depended upon to carry current.
4.6.2 Stainless steel may be employed for a part not subject to arcing.
4.6.3 Pressure wire terminal screws and wire binding screws shall be permitted to be made of plated iron or steel.
4.6.4 Iron or steel, if protected against corrosion by zinc, tin, or equivalent plating, may be used for screws, plates, yokes, or other parts that are employed as a means of clamping the conductor, provided that such parts are not the primary current-carrying members.
4.6.5 Suitable means shall be provided for retaining live parts within such limits of alignment as to ensure that plugs will enter receptacles, connectors, and the like in the intended manner.
4.6.6 Uninsulated live parts shall be secured in place to ensure the clearances and creepage distances required in Clauses 4.7.1 and 4.7.3 are maintained.
4.6.7 A current-carrying part shall be prevented from turning relative to the surface on which it is mounted if such turning would result in a reduction of spacings below the minimum acceptable values.
4.7 Clearances and creepage distances
4.7.1 The clearances and creepage distances shall be not less than 6.4 mm (1/4 inch) between:
a) Field wiring terminals of opposite polarity; and
b) A field wiring terminal and any other uninsulated metal part of a different polarity.
4.7.2 For field wiring terminals intended for solder connections using solid or tin dipped stranded wire only, the minimum clearances and creepage distances between the terminals shall be as specified in UL 840 or CSA C22.2 No. 0.2. See Clause 7.1.12.2.
4.7.3 In all circuits other than at field wiring terminals, the acceptability of the clearances and creepage distances between an uninsulated live part and any other uninsulated metal part, not of the same polarity shall be as specified in UL 840, IEC 60664-1, or CSA 022.2 No. 0.2.
4.7.4 The dead metal mentioned in Clause 4.7.3 includes a metal surface on which the device is mounted in the intended manner. A dead-metal screw head, rivet, or the like, shall not be considered to be exposed to contact by persons after the device is installed in the intended manner if it cannot be contacted by the probe illustrated in Figure 1.
4.7.5 Clearances and creepage distances shall be measured in accordance with UL 840, IEC 60664-1, or CSA C22.2 No. 0.2. In determining the pollution degree and overvoltage category, the end-use application may be considered for a higher pollution degree and may modify those characteristics given in Clauses 4.7.8 and 4.7.9.
4.7.6 Clearances and creepage distances shall be measured in all conditions of use, both with and without mating devices of the intended configuration installed and any movable parts displaced to the position of a minimum spacing.