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UL 83-2020 pdf free download

UL 83-2020 pdf free download.hermoplastic-Insulated Wires and Cables. The nominal diameters of solid and stranded conductors are shown in Table 4 — Table 9. There are no diameter requirements for conductor classes not referenced in Tab!e4 — Table 9. See Clause 5.2 for conductor resistance requirements. The minimum diameter for stranded conductors is 98 percent of the nominal. The maximum diameter is 101 percent of the nominal. The diameter shall be determined in accordance with the test, Conductor diameter, in UL 2556, CSA C22.2 No. 2556, or NMX-J-066-ANCE.
4.1.6,2 Conductor sizes in mm2 (AWG/kcmil) covered by this Standard are shown in Table 4. The nominal cross-sectional area of a conductor identified in IIc4 is not a requirement.
4.1.7 Joints A joint (butt splice) where allowed shall be made before or after insulating and prior to further processing. Where joints (butt splices) are made after insulating, the insulation applied over the joint shall be of the same insulation material used throughout the length of the conductor, or of another insulating material that meets or exceeds the electrical, physical, and mechanical requirements of this Standard for the original insulating material. A joint in a solid conductor or in one of the individual wires of a stranded conductor shall neither increase the diameter nor materially decrease the strength of the conductor or the individual wire. Not more than one of the wires in a stranded conductor of 19 wires or less, nor more than one of the wires in any given layer in a stranded conductor of more than 19 wires, shall be joined in any 0.3 m (1 ft) of conductor. In a rope-lay-stranded conductor, wtiicli consists of a central core surrounded by one or more layers of stranded members (primary groups), each member shall be considered equivalent to a solid wire, and as such, shall be spliced as a unit. These joints shall not be any closer together than 2 lay lengths. A joint shall be allowed in a Class B stranded 2.08 mm2 (14 AWG), 3.31 mm2 (12 AWG), 5.26 mm2 (10 AWG), or 8,37 mm2 (8 AWG) insulated copper conductor intended to be used in a multiple- conductor cable, with an overall covering. The joint (butt splice) shall be made by machine brazing or welding the entire conductor such that the resulting solid section of the stranded conductor is no ‘onger than 13 mm (0.50 inch). In addition, the joint shall not increase the diameter of the conductor, there shall be no sharp points, and the distance between joints in a single conductor shall not average less than 1000 m (3280 ft) in any finished length of that single insulated conductor. Insulated conductors with a joint (butt splice) shall not be surface marked with a type designation.
4.1.8 Separator
A separator of suitable material between the conductor and the insulation shall be optional. The separator shall be of contrasting color to the conductor color, except that clear or green shall not be used. Whitecolored separator over aluminum conductors shall be optional. The separator and the other wire or cable components shall not have any deleterious effect on each other.UL 83-2020 pdf free download.

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