2 Thhn Wire Amp Rating

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.

2 thhn wire amp rating.

The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor. You must use the correct size wire for the current load requirement of the circuit to prevent the wire from overheating. Usually a general purpose house circuit is designed for 20. The higher the gauge number the smaller the.

14 copper 20a for no. Rhw thhw thw thwn xhhw zw 90 c 194 f. 2 4 6301 east stassney lane suite 100. The amperage rating of a cord is a function of the wire gauge number of current carrying conductors and length of the cord.

The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 volts 60 c through 90 c 140 f through 194 f not more than three current carrying conductors in raceway cable or earth directly buried based on ambient air temperature of 30 c 86 f. 120 240 volt 3 wire single phase service entrance conductors service lateral conductors and feeder conductors that serve as the main power feeder to a dwelling unit and are installed in raceway or cable with or without an. 7 1 the wire shall bear the underwriters laboratories labels for types thwn or thhn solid conductors and type mtw stranded conductors andthe c ul label for types t90 nylon ortwn75 ft1. Rated 0 through 2000 volts with an overall covering multiconductor on raceway in free air based on ambient air temperature of 30 c 86 f.

Ampacity chart table b 310 1 ampacities of two or three insulated conductors. 60 c 140 f 75 c 167 f awg mm copper. 1 a conductor that is used to carry an unbalanced current from the other conductors is not considered to be a current. Tw uf 75 c 167 f.

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. The tables below are intended to be a general guide for wire size and amp ratings. Wire size chart and maximum amp ratings. 1 current ratings for up to 1000 v pvc insulated single and multicore wiring cables ambient temperature up to 30 o c values for resistance are based on electrical resistivity for copper 1 724 x 10 8 ω m 0 0174 μω m and electrical resistivity for aluminum 2 65 x 10 8 ω m 0 0265 μω m.