1. Find the amapacity of a # 14 AWG copper conductor with type THHN insulation. The conductor is to be run in conduit with two other conductors and located in an area with an ambient temperature of 30 degrees c. 2. Find the ampacity of a # 8 AWG aluminum conductor with type RHM insulation. The conductor is to be run in conduit with two other conductors and located in an area with ambient temperature of 30 degree c. 3. Find the ampacity of a # 4 AWG copper conductor with type RHW insulation. The conductor is to be run in conduit with two other conductors and located in an area with an ambient temperature of 30 degree c.

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1. Find the amapacity of a # 14 AWG copper conductor with type THHN insulation. The conductor is to be run in conduit with two other conductors and located in an area with an ambient temperature of 30 degrees c.

2. Find the ampacity of a # 8 AWG aluminum conductor with type RHM insulation. The conductor is to be run in conduit with two other conductors and located in an area with ambient temperature of 30 degree c.

3. Find the ampacity of a # 4 AWG copper conductor with type RHW insulation. The conductor is to be run in conduit with two other conductors and located in an area with an ambient temperature of 30 degree c.

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Answer 1: 

According to NEC table 310.15(B)(2)(b) , for 30 degree Celsius  ambient temperature

Correction factor is 1.22 and conversion factor for given number of conductor is 0.80 

current rating for 14 AWG copper conductor(THHN) is 25 Amp 

 

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