UL588 绝缘牢固测试时什么意思？
75.1 Cord and wires employed in a seasonal lighting product shall be secured within the attachment plug,current tap, or cord connector such that the conductor insulation does not slip away from the terminal
connections. Unless a knot in the cord or wires inside the plug or other equivalent positive means provides
security for the conductor insulation, the assembly shall be capable of withstanding the pull described in
75.2 without detachment of the insulation from the holding means within the device, or baring of the
conductors at the entry to the device.
75.2 One device is to be wired as intended with at least a 6-inch (152-mm) length of flexible cord or wires.
The insulation on each conductor of the cord or wires is to be slit, parallel to the conductor, for a short
distance at a point approximately 1 inch (25.4 mm) from its entry into the device, and all strands of the
conductor and the separator (if any) are to be severed at the slit portion. With the device securely held by
its blades, a direct pull of 15 lbs (67 N) for 20 AWG (0.52 mm2) or larger conductors and 10 lbs (45 N)
for conductors smaller than 20 AWG is to be applied for 2 minutes at the free end of the cord or wires.
The pull is to be applied in a direction normal to the plane of the cord-entry hole.
为什么要把线撕开？，什么意思呀？
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