2 Thhn Wire Amp Rating

The amperage rating of a cord is a function of the wire gauge number of current carrying conductors and length of the cord.

2 thhn wire amp rating.

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. Ampacity chart table b 310 1 ampacities of two or three insulated conductors. Usually a general purpose house circuit is designed for 20. Rhw thhw thw thwn xhhw zw 90 c 194 f.

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. The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor. The tables below are intended to be a general guide for wire size and amp ratings. The resulting value is the ampacity of the wire installed throughout the building or other installation.

60 c 140 f 75 c 167 f awg mm copper. 14 copper 20a for no. The higher the gauge number the smaller the. 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.

1 a conductor that is used to carry an unbalanced current from the other conductors is not considered to be a current. 2 4 6301 east stassney lane suite 100. You must use the correct size wire for the current load requirement of the circuit to prevent the wire from overheating. Tw uf 75 c 167 f.

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. Current is measured in amperes or amps. 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. 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.