Subj.758 Section 2 Page 2558 Issued:1972-01-05
Style 2558 Multiple-conductor cable using non-integral jacket

Rating60 deg C, 30 Vac, Horizontal flame.
Conductor29 AWG - 20 AWG solid or stranded round, copper, copper-clad steel, copper alloy, bare, tinned or silver-coated, having a min of 40 percent conductivity.
InsulationExtruded FRPE, 15 mils min average thickness, 13 mils minimum thickness at any point. Over the conductor shall be applied a spiral wrap of flame-retardant polyethylene thread nominally 15 mils in dia, approx 1/2 in between turns. This assembly shall be enclosed with a flame retardant polyethylene tube having an approx 15 mils wall.
AssemblyTwo to nine conductors laid flat to Assemblyform a ribbon type cable with a max width of 1 in.
ShieldA shield over each tube shall consist of a wrap of aluminum faced Polyester tape with a drain wire applied under the shield.
JacketExtruded PVC, 30 mils min average thickness, 24 mils minimum thickness at any point.
StandardAppliance Wiring Material UL 758.
UseInternal wiring and exteral interconnection of electronic equipment.

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