2 Stranded Copper Wire Ampacity Chart

Current is measured in amperes or amps.

2 stranded copper wire ampacity chart. Copper aluminum awg service or feeder or kcmil kcmil rating amperes 4 2 100. Allowable ampacities of conductors in free air. Lighting circuits may be designed for only 15. The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor.

The american wire gauge awg measurement system was designed with a purpose. Usually a general purpose house circuit is designed for 20 amps. Formerly table 310 16 allowable ampacities of insulated copper 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 temperature of 30 c 86 f. 120 240 volt 3 wire single phase service entrance conductors service.

For every three steps in the gauge scale wire area and weight per unit length approximately doubles. Awg copper wire table size and data chart 100 degrees f. This amp chart highlights the types of cords gauge size range number of cord coductors ampacity of current carrying conductors and much more. Usually a general purpose house circuit is designed for 20.

This is a handy rule to remember when making rough wire size estimations. Use the stayonline wire ampacity chart to look up the rated amperage of different sizes and types of cords. If you are running more than 100a you probably will run aluminum and need a different table. For 60 degree wiring inside romex.

Must use the correct size wire for the amperage requirement of the circuit to prevent the wire from over heating. As you might guess the rated ampacities are just a rule of thumb. Amp chart lead wire current carrying capacity ampacity awg size insulated conductor temperature rating awg size at 80 c at 90 c at 105 c at 125 c at 150 c at 200 c 40 0 33 0 49 0 55 0 60 0 71 0 78 40 38 0 47 0 68 0 77. The ampacity chart below shows the allowable ampacities of single insulated electrical wire rated up to and including 2000 volts 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 amperage requirement of the circuit. You must use the correct size wire for the current load requirement of the circuit to prevent the wire from overheating. The allowable values in the ampacity table are based on temperature alone and.