Need to see Electrical Conductors in a Quick and Easy Table?
Just Select the Conduit type and the Wire Insulation to Get A Quick Table of conductor
properties.
Conduit Type: 

Insulation Type: 

Size 
Copper 
Aluminum 
Diameter 
Wires in Conduit 
60°C 
75°C 
90°C 
60°C 
75°C 
90°C 
1/2" 
3/4" 
1" 
1 1/4" 
1 1/2" 
2" 
2 1/2" 
3" 
3 1/2" 
4" 
#14 
20 A 
20 A 
25 A 



0.11 in 
12 
22 
35 
61 
84 
138 
242 
365 
477 
609 
#12 
25 A 
25 A 
30 A 
20 A 
20 A 
25 A 
0.13 in 
9 
16 
25 
45 
61 
101 
176 
266 
347 
444 
#10 
30 A 
35 A 
40 A 
25 A 
30 A 
35 A 
0.16 in 
5 
10 
16 
28 
38 
63 
110 
167 
218 
279 
#8 
40 A 
50 A 
55 A 
30 A 
40 A 
45 A 
0.22 in 
3 
5 
9 
16 
22 
36 
63 
96 
126 
161 
#6 
55 A 
65 A 
75 A 
40 A 
50 A 
60 A 
0.25 in 
1 
4 
6 
11 
16 
26 
46 
69 
91 
116 
#4 
70 A 
85 A 
95 A 
55 A 
65 A 
75 A 
0.32 in 
1 
2 
4 
7 
9 
16 
28 
42 
56 
71 
#3 
85 A 
100 A 
110 A 
65 A 
75 A 
85 A 
0.35 in 
1 
1 
3 
6 
8 
13 
24 
36 
47 
60 
#2 
95 A 
115 A 
130 A 
75 A 
90 A 
100 A 
0.38 in 
1 
1 
2 
5 
7 
11 
20 
30 
39 
50 
#1 
110 A 
130 A 
150 A 
85 A 
100 A 
115 A 
0.45 in 
1 
1 
1 
3 
5 
8 
14 
22 
29 
37 
#1/0 
125 A 
150 A 
170 A 
100 A 
120 A 
135 A 
0.49 in 
0 
1 
1 
3 
4 
7 
12 
19 
24 
31 
#2/0 
145 A 
175 A 
195 A 
115 A 
135 A 
150 A 
0.53 in 
0 
1 
1 
2 
3 
6 
10 
15 
20 
26 
#3/0 
165 A 
200 A 
225 A 
130 A 
155 A 
175 A 
0.58 in 
0 
1 
1 
1 
3 
5 
8 
13 
17 
22 
#4/0 
195 A 
230 A 
260 A 
150 A 
180 A 
205 A 
0.64 in 
0 
0 
1 
1 
1 
4 
7 
10 
14 
18 
#250 
215 A 
255 A 
290 A 
170 A 
205 A 
230 A 
0.71 in 
0 
0 
1 
1 
1 
3 
5 
8 
11 
14 
#300 
240 A 
285 A 
320 A 
190 A 
230 A 
255 A 
0.77 in 
0 
0 
0 
1 
1 
2 
5 
7 
10 
12 
#350 
260 A 
310 A 
350 A 
210 A 
250 A 
280 A 
0.82 in 
0 
0 
0 
1 
1 
1 
4 
6 
8 
11 
#400 
280 A 
335 A 
380 A 
225 A 
270 A 
305 A 
0.86 in 
0 
0 
0 
1 
1 
1 
3 
6 
7 
10 
#500 
320 A 
380 A 
430 A 
260 A 
310 A 
350 A 
0.95 in 
0 
0 
0 
1 
1 
1 
3 
5 
6 
8 
#600 
355 A 
420 A 
475 A 
285 A 
340 A 
385 A 
1.05 in 
0 
0 
0 
0 
1 
1 
2 
4 
5 
6 
#700 
385 A 
460 A 
520 A 
310 A 
375 A 
420 A 
1.12 in 
0 
0 
0 
0 
1 
1 
1 
3 
4 
5 
#750 
400 A 
475 A 
535 A 
320 A 
385 A 
435 A 
1.16 in 
0 
0 
0 
0 
1 
1 
1 
3 
4 
5 
#800 
410 A 
490 A 
555 A 
330 A 
395 A 
450 A 
1.19 in 
0 
0 
0 
0 
0 
1 
1 
3 
4 
5 
#900 
435 A 
520 A 
585 A 
355 A 
425 A 
480 A 
1.25 in 
0 
0 
0 
0 
0 
1 
1 
2 
3 
4 
#1000 
455 A 
545 A 
615 A 
375 A 
445 A 
500 A 
1.31 in 
0 
0 
0 
0 
0 
1 
1 
2 
3 
4 
No guarantees are made as to the accuracy of the calculation or compliance with
local codes. Verify all calculations with a professional engineer. If you
find an error, or have a suggestion, please send us an
email.