Welding Cable Ampacity Nec

Unless the variables are known and can be accounted for it is not recommended to use welding cables in nonwelding applications.

Welding cable ampacity nec.

The total circuit length includes both welding and ground leads based on 4 volt drop 60 duty cycle. Ampacity based on nec table 310 15 b 16 formerly table 310 16 allowable ampacities of insulated conductors rated up to and including 2000 volts 60 through 90 c 140 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. Awg amperes awg amperes 4 0 315 1 170 3 0 275 2 150. Allowable ampacities of insulated conductors rated 0 2000 volts as excerpted from the 2002 national electrical code ampacities of not more than three current carrying conductors in raceway cable or earth.

Suggested ampacities for 600 volt in line applications. For welding cable application required cable sizes shown in awg numbers. 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 ampacities single conductor required cable sizes.

Welding cable ampacity and sizing ampacity also known as current carrying capacity or current rating is the maximum amount of current that a cable can safely carry without exceeding its operating temperature rating due to the heat generated from losses and ambient heat around the cable. The sizes of cables generally used ranged from 2 awg to 3 0 awg. Welding cable ampacity ratings depend on many factors including the length of the welding circuit rated output of the welding power source and the duty cycle of the welding source. In actually service the load factor may be much higher than indicated without overheating the cable as the ambient temperature will generally be substantially lower than 40c.