UL-1691:2012 pdf free download – STANDARD FOR SAFETY Single Pole Locking-Type Separable Connectors.
5.2 Mating and intermateability
5.2.1 Device configurations that are intermateable and identified in Annex B shall comply with all applicable dimensions as shown and be so identified as described in 7.1.1 b).
5.2.2 Devices not covered in Annex B shall not be intermateable with those devices in Annex B.
5.3 Insulating material
5.3.1 An enclosure or insulator in or on which live parts are mounted shall be of an insulating material acceptable for the particular application.
5.3.2 Vulcanized fiber may be used for insulating washers, separators, and barriers, but not as the sole support for live parts. The material shall be moisture-resistant in accordance with the Moisture Absorption Resistance Test, 6.6.
5.3.3 Except as indicated in 5.3.4 — 5.3.8, a polymeric material used for electrical insulation, an internal barrier necessary to maintain electrical spacings, or an enclosure of live parts:
a) Shall have a flame class rating of HB, V-2, V-i, V-0, VTM-2, VTM-1, VTM-0, 5VA, or 5VB in accordance with the requirements of the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94 and GSA C22.2 No. 0.17.
b) Shall comply with the requirements in Comparative Tracking Index, 6.2, and Glow Wire Test,
6.3.
5.3.4 A small part meeting all the following criteria need not have a flame class rating, nor does it need to comply with the requirements in 5.3.3:
a) Its volume does not exceed 2 cm3 (0.122 cubic inch),
b) Its maximum dimension does not exceed 3 cm (1.18 inches), and
c) Its location is such that it cannot propagate flame from one area to another or act as a bridge between a possible source of ignition and other ignitable parts.
5.3.5 Fiber or similar material that is equal to or less than 0.25 mm (0.010 inch) thick need not have a flame class rating nor comply with the requirements in 5.3.3.
5.3.6 A polymeric material having a maximum Comparative Tracking Index (CTI) performance level class of 3 (175) need not comply with the Comparative Tracking Index Test, 6.2.
5.3.7 A polymeric material having Hot Wire Ignition (HWI) performance level class values not greater than those shown in Table ifor the applicable flammability classification need not comply with the Glow Wire Test, 6.3.
5.4 Resistance to corrosion
5.4.1 Parts of iron or steel, other than stainless steel, or aluminum shall be protected against corrosion, in accordance with the Resistance to Corrosion Test, 6.13.
5.4.2 Iron or steel other than machine screws, washers, nuts, and stainless steel parts shall be protected against corrosion.
5.5 Current-carrying parts
5.5.1 Iron or steel, plated or unplated, shall not be used for parts that are depended upon to carry current, except that stainless steel may be employed for a part not subject to arcing.
5.5.2 A steel that is corrosion-resistant (stainless) or is protected against corrosion by zinc or tin plating or an equivalent protective coating may be used for terminal nuts and screws. Terminal nuts and screws are considered not to be depended upon to carry current.
5.5.3 A current—carrying part shall be prevented from moving relative to the surface on which it is mounted if such movement would adversely affect the performance of the device.
5.5.4 Uninsulated live parts shall be secured in place so that spacings comply with the requirement in 5.9.1.