Application and Constructure:
1: THHN: It indicates a single or stranded conductor having flame-retardant and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 90oC dry only.
2: THWN: It indicates a single or stranded conductor having flame-retardant, moisture and heat resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 75oC wet or dry
3: Conductor: Annealed solid or stranded copper wires
4: Insulation: Polyvinyl Chloride (PVC) Rated 105oC
5: Jacket: Nylon jacket is provided to protect PVC insulation against abrasions and scratches while pulling through conduits. It is also resistant to oil , gasoline and chemicals.
Specification:
Size | NO. of Strands | PVC Insulation Thickness | Nylon Sheath Thickness | Approx OD. | Ampacity | ||
AWG | MCM | mm | mm | mm | THHN | THWN | |
14 | solid | 0.38 | 0.1 | 2.6 | 15 | 15 | |
12 | solid | 0.38 | 0.1 | 3.02 | 20 | 20 | |
10 | solid | 0.51 | 0.1 | 3.81 | 30 | 30 | |
14 | 19 | 0.38 | 0.1 | 2.78 | 15 | 15 | |
12 | 19 | 0.38 | 0.1 | 3.27 | 20 | 20 | |
10 | 19 | 0.51 | 0.1 | 4.11 | 30 | 30 | |
8 | 19 | 0.76 | 0.13 | 5.43 | 50 | 65 | |
6 | 19 | 0.76 | 0.13 | 6.36 | 65 | 75 | |
4 | 19 | 1.02 | 0.15 | 8.11 | 85 | 95 | |
3 | 19 | 1.02 | 0.15 | 8.82 | 100 | 110 | |
2 | 19 | 1.02 | 0.15 | 9.63 | 115 | 130 | |
1 | 19 | 1.27 | 0.18 | 11.09 | 130 | 150 | |
1/0 | 19 | 1.27 | 0.18 | 12.08 | 150 | 170 | |
2/0 | 19 | 1.27 | 0.18 | 13.34 | 175 | 195 | |
3/0 | 19 | 1.27 | 0.18 | 14.64 | 200 | 225 | |
4/0 | 19 | 1.27 | 0.18 | 16.04 | 230 | 280 | |
250 | 37 | 1.52 | 0.2 | 17.79 | 255 | 290 | |
300 | 37 | 1.52 | 0.2 | 19.09 | 286 | 320 | |
350 | 37 | 1.52 | 0.2 | 20.39 | 310 | 350 | |
400 | 37 | 1.52 | 0.2 | 21.49 | 335 | 380 | |
500 | 37 | 1.52 | 0.2 | 23.59 | 380 | 430 |