Thhn/ Thwn-2/ Mtw Copper Building Wire and Cable
Product Description
CONSTRUCTION :
THHN or THWN-2* or MTW copper conductors are annealed (soft) copper, insulated with a tough heat and moisture resistant polyvinyl chloride (PVC), over which a nylon (polyamide) or UL-listed equal jacket is applied Available in black, white, red, blue, green, yellow, brown, orange, and gray; Some colors standard, some subject to economic order quantity.
Conductor sizes 2 AWG and larger listed and marked sunlight-resistant in black only
SPECIFICATION of MTW or THHN or THWN-2 type cable
Conductors shall be UL-listed Type MTW or THHN or THWN-2* gasoline and oil resistant II, suitable for operations at 600 volts as specified in the National Electrical Code. Sizes 14 through 1 AWG shall be rated VW-1, larger sizes shall be listed for CT use. Sizes 2 AWG and larger listed and marked sunlight-resistant in black only. Conductors shall be annealed copper, insulated with high-heat and moisture resistant PVC, jacketed with abrasion, moisture, gasoline, and oil resistant nylon or listed equivalent.
Application of thhn /thwn/tffn/mtw cable:
THHN or THWN-2* conductors are primarily used in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications as specified in the National Electrical Code 2;
1) When used as Type THHN, conductor is suitable for use in dry locations at temperatures not to exceed 90° C;
2) When used as Type THWN-2*, conductor is suitable for use in wet or dry locations at temperatures not to exceed 90° C or not to exceed 75° C when exposed to oil or coolant;
3) When used as Type MTW, conductor is suitable for use in wet locations or when exposed to oil or coolant at temperatures not to exceed 60° C or dry locations at temperatures not to exceed 90° C (with ampacity limited to that for 75° C conductor temperature per NFPA 79)
Conductor temperatures not to exceed 105° C in dry locations when rated AWM and used as appliance wiring material. Voltage for all applications is 600 volts
STANDARDS & REFERENCE:
THHN or THWN-2* or MTW (also AWM) meets or exceeds all applicable ASTM specifications, UL Standard 83, UL Standard 1063 (MTW), Federal Specification A-A-59544, and requirements of the National Electrical Code.
AWM Conductors shall be UL-listed Type THHN or THWN-2* or MTW or AWM, suitable for
Operation at 600 volts at conductor temperatures not to exceed 105° C.
Conductor | Insulation Thickness (mils) |
Jacket thickness (mils) |
Nominal O.D | Approx. net weight/1000ft | Allowable ampacities | |||||
Size (AWG or kcmil) |
Strands | Solid | Stranded | Solid | Stranded | 60 0 C | 75 0 C | 90 0 C | ||
14 | 19 | 15 | 4 | 102 | 109 | 15 | 16 | 15 | 15 | 15 |
12 | 19 | 15 | 4 | 119 | 128 | 23 | 24 | 20 | 20 | 20 |
10 | 19 | 20 | 4 | 150 | 161 | 37 | 38 | 30 | 30 | 30 |
8 | 19 | 30 | 5 | / | 213 | / | 62 | 40 | 50 | 55 |
6 | 19 | 30 | 5 | / | 249 | / | 95 | 55 | 65 | 75 |
4 | 19 | 40 | 6 | / | 318 | / | 152 | 70 | 85 | 95 |
3 | 19 | 40 | 6 | / | 346 | / | 188 | 85 | 100 | 110 |
2 | 19 | 40 | 6 | / | 378 | / | 234 | 95 | 115 | 130 |
1 | 19 | 50 | 7 | / | 435 | / | 299 | 110 | 130 | 150 |
1/0 | 19 | 50 | 7 | / | 474 | / | 371 | 125 | 150 | 170 |
2/0 | 19 | 50 | 7 | / | 518 | / | 461 | 145 | 175 | 195 |
3/0 | 19 | 50 | 7 | / | 568 | / | 574 | 165 | 200 | 225 |
4/0 | 19 | 50 | 7 | / | 624 | / | 717 | 195 | 230 | 260 |
250 | 37 | 60 | 8 | / | 694 | / | 850 | 215 | 255 | 290 |
300 | 37 | 60 | 8 | / | 747 | / | 1011 | 240 | 285 | 320 |
350 | 37 | 60 | 8 | / | 797 | / | 1173 | 260 | 310 | 350 |
400 | 37 | 60 | 8 | / | 842 | / | 1333 | 280 | 335 | 380 |
500 | 37 | 60 | 8 | / | 926 | / | 1653 | 320 | 380 | 430 |
600 | 61 | 70 | 9 | / | 1024 | / | 1985 | 355 | 420 | 475 |
750 | 61 | 70 | 9 | / | 1126 | / | 2462 | 400 | 475 | 535 |
1000 | 61 | 70 | 9 | / | 1275 | / | 3254 | 455 | 545 | 615 |
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