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Management Technologies for the Rest of Us™
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| 1952 |
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| 4.8 out of 5
(12 votes) |
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Select the Conductor Material:
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Insulation Type:
| |
Conduit Material Type:
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| Size |
Copper
|
Size |
Impedance1 |
Max Length2 |
| 60°C |
75°C |
90°C |
Diameter |
Area |
XL |
RCu
|
Zeff |
120V |
208V |
277V |
480V |
| Per 1000 feet |
|
#14
|
20 A
|
20 A
|
25 A
|
0.11 in
|
0.01 in2
|
0.073 Ω
|
3.100 Ω
|
2.67 Ω
|
42 ft
|
73 ft
|
97 ft
|
168 ft
|
|
#12
|
25 A
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25 A
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30 A
|
0.13 in
|
0.01 in2
|
0.068 Ω
|
2.000 Ω
|
1.74 Ω
|
52 ft
|
90 ft
|
120 ft
|
207 ft
|
|
#10
|
30 A
|
35 A
|
40 A
|
0.16 in
|
0.02 in2
|
0.063 Ω
|
1.200 Ω
|
1.05 Ω
|
61 ft
|
106 ft
|
141 ft
|
244 ft
|
|
#8
|
40 A
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50 A
|
55 A
|
0.22 in
|
0.04 in2
|
0.065 Ω
|
0.780 Ω
|
0.70 Ω
|
65 ft
|
112 ft
|
149 ft
|
258 ft
|
|
#6
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55 A
|
65 A
|
75 A
|
0.25 in
|
0.05 in2
|
0.064 Ω
|
0.490 Ω
|
0.45 Ω
|
77 ft
|
133 ft
|
177 ft
|
308 ft
|
|
#4
|
70 A
|
85 A
|
95 A
|
0.32 in
|
0.08 in2
|
0.060 Ω
|
0.310 Ω
|
0.30 Ω
|
90 ft
|
155 ft
|
207 ft
|
359 ft
|
|
#3
|
85 A
|
100 A
|
110 A
|
0.35 in
|
0.10 in2
|
0.059 Ω
|
0.250 Ω
|
0.24 Ω
|
92 ft
|
160 ft
|
213 ft
|
369 ft
|
|
#2
|
95 A
|
115 A
|
130 A
|
0.38 in
|
0.12 in2
|
0.057 Ω
|
0.200 Ω
|
0.20 Ω
|
98 ft
|
170 ft
|
226 ft
|
391 ft
|
|
#1
|
110 A
|
130 A
|
150 A
|
0.45 in
|
0.16 in2
|
0.057 Ω
|
0.160 Ω
|
0.17 Ω
|
104 ft
|
181 ft
|
241 ft
|
417 ft
|
|
#1/0
|
125 A
|
150 A
|
170 A
|
0.49 in
|
0.19 in2
|
0.055 Ω
|
0.120 Ω
|
0.13 Ω
|
115 ft
|
199 ft
|
264 ft
|
458 ft
|
|
#2/0
|
145 A
|
175 A
|
195 A
|
0.53 in
|
0.22 in2
|
0.054 Ω
|
0.100 Ω
|
0.11 Ω
|
113 ft
|
196 ft
|
262 ft
|
453 ft
|
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#3/0
|
165 A
|
200 A
|
225 A
|
0.58 in
|
0.27 in2
|
0.052 Ω
|
0.079 Ω
|
0.09 Ω
|
119 ft
|
206 ft
|
275 ft
|
476 ft
|
|
#4/0
|
195 A
|
230 A
|
260 A
|
0.64 in
|
0.32 in2
|
0.051 Ω
|
0.063 Ω
|
0.08 Ω
|
122 ft
|
211 ft
|
281 ft
|
487 ft
|
|
#250
|
215 A
|
255 A
|
290 A
|
0.71 in
|
0.40 in2
|
0.052 Ω
|
0.054 Ω
|
0.07 Ω
|
120 ft
|
209 ft
|
278 ft
|
482 ft
|
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#300
|
240 A
|
285 A
|
320 A
|
0.77 in
|
0.46 in2
|
0.051 Ω
|
0.045 Ω
|
0.07 Ω
|
121 ft
|
210 ft
|
280 ft
|
485 ft
|
|
#350
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260 A
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310 A
|
350 A
|
0.82 in
|
0.52 in2
|
0.050 Ω
|
0.039 Ω
|
0.06 Ω
|
122 ft
|
211 ft
|
282 ft
|
488 ft
|
|
#400
|
280 A
|
335 A
|
380 A
|
0.86 in
|
0.59 in2
|
0.049 Ω
|
0.035 Ω
|
0.06 Ω
|
121 ft
|
210 ft
|
279 ft
|
484 ft
|
|
#500
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320 A
|
380 A
|
430 A
|
0.95 in
|
0.71 in2
|
0.048 Ω
|
0.029 Ω
|
0.05 Ω
|
119 ft
|
206 ft
|
274 ft
|
474 ft
|
|
#600
|
355 A
|
420 A
|
475 A
|
1.05 in
|
0.87 in2
|
0.048 Ω
|
0.025 Ω
|
0.05 Ω
|
115 ft
|
200 ft
|
266 ft
|
460 ft
|
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#700
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385 A
|
460 A
|
520 A
|
1.12 in
|
0.99 in2
|
0.048 Ω
|
0.023 Ω
|
0.04 Ω
|
109 ft
|
189 ft
|
252 ft
|
436 ft
|
|
#750
|
400 A
|
475 A
|
535 A
|
1.16 in
|
1.05 in2
|
0.048 Ω
|
0.021 Ω
|
0.04 Ω
|
110 ft
|
190 ft
|
253 ft
|
439 ft
|
|
#800
|
410 A
|
490 A
|
555 A
|
1.19 in
|
1.11 in2
|
0.047 Ω
|
0.020 Ω
|
0.04 Ω
|
110 ft
|
191 ft
|
254 ft
|
440 ft
|
|
#900
|
435 A
|
520 A
|
585 A
|
1.25 in
|
1.23 in2
|
0.047 Ω
|
0.019 Ω
|
0.04 Ω
|
106 ft
|
183 ft
|
244 ft
|
423 ft
|
|
#1000
|
455 A
|
545 A
|
615 A
|
1.31 in
|
1.35 in2
|
0.046 Ω
|
0.018 Ω
|
0.04 Ω
|
104 ft
|
181 ft
|
241 ft
|
418 ft
|
... CALCULATING ...
Notes:
| 1Impedance is calculated utilizing a
0.85 power factor |
| 2Maximum Length is based on 3% of the
voltage value given and a power load that is 80% of the 75°C allowable ampacity. |
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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.
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