Construction
Conductors: Bare, soft annealed copper per ASTM B3.
Sizes 18 & 16 AWG (TFFN):
Bunch Stranded. Size 18 (16/.010”) and Size 16 (26/.0210”) per UL-62 Table 11.1.
Sizes 14, 12 & 10 AWG (THHN/THWN):
Concentric stranded Class B (7 strands) per ASTM B-8 and UL-83 Table 13.1.
Insulation: High dielectric strength polyvinyl chloride,
UL-1581 Table 50.145 (THWN 75˚C),
UL-1581 Table 50.155 (THHN 90˚C),
UL-1581 Table 50.155 Class 12B (TFFN 90˚C).
Thickness: UL-83 Table 15.8 for THHN/THWN, UL-66 Table 4.7 for TFFN.
Conductor Jacket: Nylon (UL-83 par. 14.1 for THHN/THWN, UL-62 par. 22.1 for TFFN)
Thickness: UL-83 table 15.8 for THHN/THWN, UL-66 par. 9.1 for TFFN.
Cable Assembly: Three or more conductors are assembled with fillers in the core as needed. Nylon
rip cord is inserted under the jacket for ease of stripping. Two conductors are assembled flat parallel (round, with fillers as needed, is available upon request).
Color Code: Colored insulation and stripes plus print on one side with a contrasting ink per Table.
Overall Jacket: A black, gas/vapor tight, flame resistant, VW-1 rated Polyvinyl Chloride (PVC) jacket is applied over the assembly. The surface profile of the jacket shall approximate that of the underlying assembly. A high strength nylon rip cord shall be placed under the jacket.
Identification: Sizes 18 & 16 AWG: “Size AWG/No. of CDRS, Type TC –ER TFFN CDRs. 90˚C DRY/ 75˚C WET, SUNLIGHT RESISTANT, 600V, (UL) DIRECT BURIAL.FT4/IEEE 1202 (SEQUENTIAL FOOTAGE)”.
Identification: Sizes 14, 12 & 10 AWG: “Size AWG/No. of CDRS, Type TC –ER THHN OR THWN
CDRs. 90˚C DRY/ 75˚C WET, SUNLIGHT RESISTANT, 600V, (UL) DIRECT BURIAL.FT4/ IEEE 1202 (SEQUENTIAL FOOTAGE)”.
Application
Three or more conductors having TFFN or VW-1 THHN/THWN (PVC/Nylon) conductors with PVC jacket conforming to Article 318 “Cable Trays” and Article 340 “Power and Control Cable Type TC”. Direct Burial, Passes 210,000 BTU flame test and suitable for use as submersible cable.
