UL 20845
Additional Details
APPLIANCE WIRING MATERIAL
Style 20845 Heating Cable.
Rating 150, 200 deg C, 600 Vac, Horizontal flame.
Conductor 18 AWG – 12 AWG solid or stranded round, tinned or bare copper.
Insulation Extruded ETFE, 10 mils min average, 9 mils minimum at any point. ). See Facing Page for compound designation.
Assembly Over the extruded ETFE insulated conductors laid parallel, a 10 mil min avg, 8 mil min at any point wall of extruded special copolymer of ethylene and tetrafluoroethylene (ETFE) is extruded to form a two conductor parallel cord. This cord is now prepared for the spiral wound heating element. This is done by carefully removing the extruded special copolymer of ethylene and tetrafluoroethylene insulation along the length of the cord so as to bare the copper conductor for approx 1/2 in widths at periodic intervals. A spirally wound nichrome or other types of resistance wire is then carefully wound the length of the core, and may be soldered to the exposed conductor. By varying the distance between contacts with the conductors, the number of turns per inch of resistance wire and the AWG size (resistance) of the spirally wound wire, different wattages per foot per service voltage can be obtained.
Shield Optional.
Covering Optional. 13 mils min at any point of extruded special copolymer of ethylene and tetrafluoroethylene (ETFE). See Facing Page for Compound Designation.
Jacket Extruded ETFE, See Facing Page for Compound Designation. 20 mils min average, 16 mils minimum at any point.
Standard Appliance Wiring Material UL 758.
Marking General.
Use Pipe heating cable where the acceptability of the combination is to be determined by Underwriters Laboratories Inc.
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