UL 486D:2005 pdf download – Sealed Wire Connector Systems.
9.1.3 The preparation of the connector shall be as specified in 10.5 a and in accordance with UL
486A-486B. CAN/CSA-C22.2 No. 65, or NMX-J-543-ANCE; or in UL 486G. GSA C22.2 No. 188, or
NMX-J-548-ANCE, as applicable. Each connector shall have provision for the connection of at least two
9.1.4 The associated insulating and sealing components shall be assembled in accordance with the manufacturer’s instructions. See I 0.5b.
9,1,5 The conductors shall be Type RHW, USE, XHHW. RW9O EP, RW9O XLPE. or TWU or one of the other types specified in 1.2. See 10.6.
9.2 Test sequence A. general
9.2.1 Immersion The assemblies shall be immersed in a tank that contains tap water at a temperature of 25 ±5 C
(77 ±9 F) for 24 h. All parts of the assemblies shall be immersed to a minimum depth of 305 mm (1 It).
92.2 Insulation resistance While still immersed, the insulation resistance of each assembly shall be measured by applying a minimum direct-current voltage of 500 V for I mm. The length of the immersed conductor shall be constant. The total length of the immersed conductors along with each connector assembly shall not exceed 2.4 m (8 It). The conductor/assembly shall be connected to the positive side of the dc voltage and the electrode in the tap water connected to the negative side. If the tracking distance from the end of the conductor to the water surface is short, a guarded circuit may be used. See Annex B.
9.2.3 Dielectric withstand Immediately after the Insulation resistance lest and while still immersed, each assembly shall be subjected to a 2200 V. 60 Hz potential for 1 mm. The potential shall be applied between the conductor/assembly and the water.
9.2.4 Heat conditioning Following the dielectric withstand test, the assemblies shall be removed from the water and conditioned in an air-circulating oven at a temperature of 90 ±5 C (194 ±9 °F) for 72 h. With the concurrence of those concerned, the test vaies may be increased to 113±5 C (235 ±9°F) for 168 h (see note in 9.4).
9.2.5 Flexing and twisting Following the heat-conditioning, the assemblies shall be removed from the air-circulating oven and allowed to cool to room temperature. Each joint formed by the insulation cover and the conductor insulation shall be subjected to this test. The insulated conductor shall be securely clamped at a distance (H) equal to:
a) 25 tImes the diameter of the insulated conductor for 4 AWG (21.2 mm2) or smaller sizes; or b) 15 times the diameter for sizes larger than 4 AWG (21.2 mm2).
The distance shall be measured from the end of the clamp to the joint formed by the insulating cover and the conductor insulatlon The assembly shall be bent 90 degrees to one side and returned to the starting position, and then bent 90 degrees In the opposite direction and returned to the starting position. This cycle shall be repeated nine more times. Figure 1 illustrates a typical test assembly for a sphcing-type connector. Figure 3 illustrates a typical test assembly for a terminal-type connector. For each end 01 the sample (for each seal), immediately following the flexing test and with the conductor still clamped as described in each assembly shall be twisted about the axis of the conductor 15 degrees clockwise from the starting position and returned to the starting position; then twisted 15 degrees counterclockwise and returned to the starting position. Ths cycle shall be repeated four more times. Figure 2 illustrates a typical test assembly for a splicing-type connector. Figure 3 illustrates a typical test assembly for a terminal-type connector. Immediately following the flexing and twisting tests, the assemblies shall be subjected to repeated immersion and insulation resistance tests described in 92.1 and 9.2.2.