Conduit Wire Fill Charts
Common Conversions
| Length | Weight | Temperature |
|---|---|---|
| 1 Foot = 0.305 Meters | 1 Pound = 454 Grams | °C = Degrees Centigrade |
| 1 Meter = 3.281 Feet | 1 Pound = 0.454 Kilograms | °F = Degrees Fahrenheit |
| 1 Inch = 25.4 Millimeters | 1 Kilogram = 2.205 Pounds | °C = (°F - 32) ÷ 1.8 |
| 1 Millimeter = 0.039 Inches | 1 Gram = 0.035 Ounces | °F = (°C x 1.8) + 32 |
| 1 Inch = 2.54 Centimeters | 1 Ounce = 28.349 Grams | |
| 1 Centimeter = 0.394 Inches |
| Conduit Wire Fill Charts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Per National Electrical Code - Chapter 9, Table 4 | ||||||||||
| Flexible Metal Conduit - BR, ABR | Liquidtight Flexible Metal Conduit - LA, LT, EF, ATLA, AT, ATX, ALT, ZHLA, CEA, CSA, VJC, LAFG, LSSFG, LTSS, ZHSS, ATXSS, ATSS, CBLA | |||||||||
| Trade Size (in.) | Internal Diameter (in.) | Total Area 100% (sq. in.) | 2 Wires 31% (sq. in.) | Over 2 Wires 40% (sq. in.) | 1 wire 53% (sq. in.) | Internal Diameter (in.) | Total Area 100% (sq. in.) | 2 Wires 31% (sq. in.) | Over 2 Wires 40% (sq. in.) | 1 wire 53% (sq. in.) |
| 3/8 | 0.384 | 0.116 | 0.036 | 0.046 | 0.061 | 0.494 | 0.192 | 0.060 | 0.077 | 0.102 |
| 1/2 | 0.635 | 0.317 | 0.098 | 0.127 | 0.168 | 0.632 | 0.314 | 0.097 | 0.126 | 0.166 |
| 3/4 | 0.824 | 0.533 | 0.165 | 0.213 | 0.282 | 0.83 | 0.541 | 0.168 | 0.216 | 0.287 |
| 1 | 1.02 | 0.817 | 0.253 | 0.327 | 0.433 | 1.054 | 0.872 | 0.27 | 0.349 | 0.462 |
| 1-1/4 | 1.275 | 1.277 | 0.396 | 0.511 | 0.677 | 1.395 | 1.528 | 0.474 | 0.611 | 0.81 |
| 1-1/2 | 1.538 | 1.857 | 0.576 | 0.743 | 0.984 | 1.588 | 1.979 | 0.613 | 0.792 | 1.049 |
| 2 | 2.04 | 3.269 | 1.013 | 1.308 | 1.733 | 2.033 | 3.245 | 1.006 | 1.298 | 1.72 |
| 2-1/2 | 2.5 | 4.909 | 1.522 | 1.964 | 2.602 | 2.493 | 4.879 | 1.512 | 1.952 | 2.586 |
| 3 | 3 | 7.069 | 2.191 | 2.828 | 3.747 | 3.085 | 7.475 | 2.317 | 2.99 | 3.962 |
| 3-1/2 | 3.5 | 9.621 | 2.983 | 3.848 | 5.099 | 3.52 | 9.731 | 3.017 | 3.892 | 5.157 |
| 4 | 4 | 12.566 | 3.895 | 5.026 | 6.66 | 4.02 | 12.692 | 3.935 | 5.077 | 6.727 |
| Flexible Nonmetallic Conduit Type A - LNMP | Liquidtight Nonmetallic Conduit Type B - NM, NMHT, NMFG, NM2 | |||||||||
| Trade Size (in.) | Internal Diameter (in.) | Total Area 100% (sq. in.) | 2 Wires 31% (sq. in.) | Over 2 Wires 40% (sq. in.) | 1 wire 53% (sq. in.) | Internal Diameter (in.) | Total Area 100% (sq. in.) | 2 Wires 31% (sq. in.) | Over 2 Wires 40% (sq. in.) | 1 wire 53% (sq. in.) |
| 3/8 | 0.495 | 0.192 | 0.06 | 0.077 | 0.102 | 0.494 | 0.192 | 0.06 | 0.077 | 0.102 |
| 1/2 | 0.63 | 0.312 | 0.097 | 0.125 | 0.165 | 0.632 | 0.314 | 0.097 | 0.126 | 0.166 |
| 3/4 | 0.825 | 0.535 | 0.166 | 0.214 | 0.284 | 0.83 | 0.541 | 0.168 | 0.216 | 0.287 |
| 1 | 1.043 | 0.854 | 0.265 | 0.342 | 0.453 | 1.054 | 0.872 | 0.27 | 0.349 | 0.462 |
| 1-1/4 | 1.383 | 1.501 | 0.465 | 0.6 | 0.796 | 1.395 | 1.528 | 0.474 | 0.611 | 0.81 |
| 1-1/2 | 1.603 | 2.017 | 0.625 | 0.807 | 1.069 | 1.588 | 1.979 | 0.613 | 0.792 | 1.049 |
| 2 | 2.063 | 3.341 | 1.036 | 1.336 | 1.771 | 2.033 | 3.245 | 1.006 | 1.298 | 1.72 |
| NPT Threaded Fittings | NPT Threaded Fittings - Knock Out Diameter | |||||||||
| 3/8 | 1/2 | 7/8 | ||||||||
| 1/2 | 1/2 | 7/8 | ||||||||
| 3/4 | 3/4 | 1-3/32 | ||||||||
| 1 | 1 | 1-23/64 | ||||||||
| 1-1/4 | 1-1/4 | 1-23/32 | ||||||||
| 1-1/2 | 1-1/2 | 2 | ||||||||
| 2 | 2 | 2-1/2 | ||||||||
