Cable sizing

The following is a general guide to sizing connectors and cable. 
The temperature rating of the conductor is 90º C/194º F, and covers
the popular jacket types of cable. This table applies to copper cable. 
   
  
 



                  
AWG**

14
12
10
8
6
4
3
2
1
1/0
2/0
3/0
4/0
250
300
350
400
500
600
700
750


                  
Allowable ampacity at 30ºC

35*
40*
55*
88
105
140
165
190
220
260
300
350
405
455
505
570
615
700
780
855
885



   
* The over current protection for conductor types indicated shall not exceed
   15 amperes for no. 14, 20 amperes for no. 12, and 30 amperes for no. 10 wire.

** For cable length more than 10 feet contact PCC for proper sizing.

Correction factor

For ambient temperatures other than 86ºF (30ºC), multiply the allowable ampacities
shown above by the appropriate factor shown below.


 

                  
Temperature (C)

21-25
26-30
31-35
36-40
41-45
  


                  
Correction

1.04
1.00
0.96
0.91
0.87


                  

  
For other temperatures, consult with PCC staff.