Length of Run in Feet

Compare size below with size left of double line and use largest size

5075100125150175200225250275300350400450500550600650700
                   
141414141212121010101088888666
141412121212101088886666644
141212101088888666444443
1210108886666444433222
121088666444433222110
                   
10886664444322111000
10866444433221100000000
8866443322210000000000000
8664433222100000000000004/0
86444322111000000000000004/04/0
864432211100000000000004/04/0250
                   
644322110000000000004/04/0250250300
64322100000000004/04/0250250300300300
64321000000000004/04/0250250300300350350
44211000000000000004/0250250300300350400400
432100000000000004/0250250300350350400400500
                   
43100000000004/04/04/0250300350350400500500500
4210000000004/04/0250250300350400400500500600600
310000000004/04/0250250300350400500500500600600700
210000004/0250250300300350400500500600600700700750
20000004/0250250300350350400500500600700700750800900

Procedure: Find the amperage in the left column and the length of run along the top of the table (if between two of the table values go to the higher value). Where the two intersect on the table is the recommended wire size that will keep voltage drop within acceptable limits. Compare the recommended value on the right side of the table to the value shown on left side (minimum NEC requirements for the insulation type to be used) and use the larger size.