Nec Ampacity Table

For safe wiring practices consult the national electrical code your local building inspector or a qualified electrician. 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. Type tw wet or dry.

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Rated 0 2000 volts.

Nec ampacity table. The allowable values in the ampacity table are based on temperature alone and. Type and location. Table 310 15 b 2 b ambient temperature correction factors based on 40 c 104 f for ambient temperatures other than 40 c 104 f multiply the allowable ampacities specified in the ampacity tables by the appropriate correction factor shown below. 60 c 140 f 75 c 167 f 90 c 194 f 60 c 140 f.

Aluminum conductors copper clad conductors. National electrical code allowable ampacities of insulated conductors. Not all values shown. This is a portion of nec table 310 15 b 16.

When using conductor ampacity table 310 15 b 16 it is important to understand why some conductor types are shown in both the 75 c column and the 90 c column. Cablesizer is an automated cable sizing and design calculation tool to iec and nec standards. Nec table 310 15 b 16 conductor ampacities. 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.

As excerpted from the 2002 national electrical code notes to accompany table note 1. Table 310 15 b 16 conductor ampacities. Ampacities are based on the 2017 nec and do not reflect any temperature correction or ampacity adjustments that may be required. 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 for.

Type uf wet or dry or corrosive. Ampacities of insulated conductors from nec table nec310 15 b 16 not more than three conductors in raceway or cable or earth directly buried based on ambient temperature of 30 c 86 f print this page.