Problem

Using Wire Tables and Determining Conductor SizesDetermine the ohms-per-mil foot of an alu...

Using Wire Tables and Determining Conductor Sizes

Determine the ohms-per-mil foot of an aluminum conductor located in an area with a temperature of 104°F (40°C). Use the NEC to determine the ampacity of the following conductors.

Size

Material

Insulation

Ambient Temperature

Conductors in Raceway

Amps

#10 AWG

Copper

RHW

44°C

3

 

350 kcmil

Copper

XHH

128°F

6

 

#2 AWG

Aluminum

TW

86°F

2

 

3/0 AWG

Aluminum

XHHW-2

38°C

9

 

500 kcmil

Copper

THWN

48°C

6

 

#6 AWG

Copper

THW-2

150°F

3

 

2/0 AWG

Aluminum

UF

86°F

12

 

750 kcmil

Aluminum

RHW-2

34°F

6

 

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