Welding Cable Ampacity Chart Nec

Welding cable ampacities single conductor required cable sizes.

Welding cable ampacity chart nec.

Table 310 15 b 16 formerly table 310 16 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 temperature of 30 c 86 f. Welding cable ampacity also known as current capacity or amperage rating refers to the maximum amount of electrical current that a cable can safely conduct. As excerpted from the 2002 national electrical code. Welding cable ampacities the total circuit length includes both welding and ground leads based on 4 volt drop 60 duty cycle required cable sizes.

Welding cable ampacities no 360 for free air. 3 wire single phase service entrance conductors service. You can use the 90 degree table for de rating purposes but it cannot be higher than the 75 degree column which is 360 amps. Table 310 16 allowable ampacities of insulated conductors rated 0 through 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.

The total circuit length includes both welding and ground leads based on 4 volt drop 60. Welding cable ampacities single conductor required cable sizes. You have to use table 310 17 for 4 0. Length is in feet for total circuit for secondary voltages only do not use this table for 600v inline applications.

For arc welding cable applications length in feet for total circuit for secondary voltage only do not use this table for 600 volt applications. Besides the cross sectional area other factors that impact the ampacity of welding cable are its length ohm rating i e resistance rating temperature ratings of the insulation. For welding cable application suggested ampacities for 600 volt in line applications awg amperes awg amperes 4 0 405 1 220 3 0 350 2 190 2 0 300 4 140 1 0 260 6 105 appendix j ampacities for portable cable in accordance with nec table 400 5 a 2. For welding cable application required cable sizes shown in awg numbers.