2 Thhn Wire Ampacity

14 copper 20a for no.

2 thhn wire ampacity.

Use the stayonline wire ampacity chart to look up the rated amperage of different sizes and types of cords. 36 48 66 76 88 102 121 138 158 187 205 234 255 274 315 343 376 387 397 415 448. Rhw thhw thw thwn thhn xhhw use rhw 2 thw 2 thwn 2 xhhw 2 se use 2. 43 58 79 90 105 121 145 166 189 223 245 281 305 328 378 413 452 466 479 500 542.

The number and type of electrical devices connected to a circuit determine the amperage requirement of the circuit. Fep fepb mi rhh rhw 2 sa sis tbs thhn thhw thw 2 thwn 2 use 2 xhh xhhw xhhw 2 zw 2 unless otherwise specifically permitted elsewhere in the nec nfpa70 code the overcurrent protection for conductor types marked with an asterisk shall not exceed 15a for no. Current is measured in amperes or amps. The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor.

14 awg 12 awg 10 awg 8 awg 6 awg 4 awg 3 awg 2 awg 1 awg 1 0 awg 2 0 awg 3 0 awg 4 0 awg 250 kcmil 300 kcmil 350 kcmil 400 kcmil 500 kcmil 600 kcmil 700 kcmil 750 kcmil 800 kcmil 900 kcmil. The resulting value is the ampacity of the wire installed throughout the building or other installation. Wire ampacity calculator enter the information below to calculate the maximum allowable ampacity for current carrying conductors. Types rh rhw thhw thw thhw.

You must use the correct size wire for the current load requirement of the circuit to prevent the wire from overheating. Thhn thhw thw 2 thwn 2 rhh rhw 2 use 2 xhh xhhw xhhw 2 zw 2. Rhw thhw thw thwn xhhw zw 90 c 194 f. Copper aluminum awg service or feeder or kcmil kcmil rating amperes.

Tw uf 75 c 167 f. Aluminum or copper clad aluminum. 8 6 4 3 2 1 1 0 2 0 3 0 4 0 250 300 350 400 500 600 700 750 800 900 1000. The allowable ampacity of each conductor shall be reduced as shown in the following table.

Usually a general purpose house circuit is designed for 20 amps. The double marking thhn thwn 2 indicates that the wire is suitable for wet and dry conditions equally the letter w means that it is water safe. Additionally the cable is resistant to corrosion excessive dryness and the impact of chemicals. Usually a general purpose house circuit is designed for 20.

Must use the correct size wire for the amperage requirement of the circuit to prevent the wire from over heating. Insulated wire types like thhn thwn 2 xhhw 2 and use 2 rhh rhw 2 have an insulation temperature rating of 90 and any temperature correction factors or ampacity adjustment factors can be applied to the insulation temperature rating. Wire size awg or kcmil. This amp chart highlights the types of cords gauge size range number of cord coductors ampacity of current carrying conductors and much more.