jimalex
Member
- Location
- Burlington NC, USA
Hello again.
I'm bruching up for the exam, and came across some conflicting information. this is an example question taken from several test prep sources:
motor load is 16 amps, what is smallest 75degree conductor you can use?
all examples size the load as 16 x 125% = 20A adjusted ampacity. but then one of my books says that is a # 12 AWG cu wire, while the other source says it is a 14 AWG cu wire. I found a couple of places on the internet that agree with the # 14, which agrees with my vague recollection of trade school, but when i read 240.4(D) in The Book, it directs me to choose the wire in accordance with sections 3 - 7 of article 430, and i'm having trouble pinning down exactly if it is the value given in table 310.15, 20A, or the adjusted value in 240.4(D), 15A, that is correct. Help!?!
appreciatively,
Jim
I'm bruching up for the exam, and came across some conflicting information. this is an example question taken from several test prep sources:
motor load is 16 amps, what is smallest 75degree conductor you can use?
all examples size the load as 16 x 125% = 20A adjusted ampacity. but then one of my books says that is a # 12 AWG cu wire, while the other source says it is a 14 AWG cu wire. I found a couple of places on the internet that agree with the # 14, which agrees with my vague recollection of trade school, but when i read 240.4(D) in The Book, it directs me to choose the wire in accordance with sections 3 - 7 of article 430, and i'm having trouble pinning down exactly if it is the value given in table 310.15, 20A, or the adjusted value in 240.4(D), 15A, that is correct. Help!?!
appreciatively,
Jim