How many amps is 750 kcmil good for?
Table 310.15(B)(17)
| Size | Temperature Rating of Copper Conductor | |
|---|---|---|
| (AWG or kcmil) | 60°C (140°F) | 90°C (194°F) |
| 600 KCMIL | 575 | 780 |
| 700 KCMIL | 630 | 850 |
| 750 KCMIL | 655 | 885 |
What size wire is 750 kcmil?
| WIRE SIZE / STRANDING | Approx. Insulation Outside Diameter | |
|---|---|---|
| AWG / kcmil | Strands | Dia mm |
| 600 | 61 | 26.17 |
| 750 | 61 | 28.77 |
| 1000 | 61 | 32.57 |
What is the ampacity of 750 aluminum?
Allowable Ampacities of Insulated Aluminum or CopperClad Aluminum Conductors
| Conductor Size (AWG/KCMIL) | 60°C/140°F TW, UF | 75°C/167°F RHW, THHW, THW, THWN, XHHW, USE, ZW |
|---|---|---|
| 750 | 320 | 385 |
| 800 | 330 | 395 |
| 900 | 355 | 425 |
| 1000 | 375 | 445 |
What is the meaning of kcmil?
thousands of circular mils
Glossary Term: kcmil MCM is an abbreviation for thousands of circular mils, an old measurement of wire gauge. 1 MCM = 1 kcmil = 0.5067 square milimeters. A mil is 1/1000 inch. A wire 200 mils in diameter is 40 MCM. MCM is generally used for very large-diameter wire.
How many amps will 2 AWG carry?
Wire Size and Amp Ratings
| Wire Size | 75°C (167°F) | |
|---|---|---|
| AWG | (mm²) | Copper |
| 2 | (33.6) | 115 |
| 1 | (42.4) | 130 |
| 1/0 | (53.5) | 150 |
What is the difference between AWG and kcmil?
kcmil—In the North American electrical industry, conductors larger than 4/0 AWG are generally identified by the area in thousands of circular mils (kcmil), where 1 kcmil = 0.5067 mm². A circular mil is the area of a wire one mil in diameter. This is an older name for kcmil and is an identical unit.
Is 8 Thhn good for 50 amps?
THHN uses the 75 deg C column in figuring ampacity in newer work. #8 is rated right at 50 amps in that column.
Why does ampacity increase with temperature?
Ampacity is a temperature rating. Increase in ambient/surrounding/medium temperature can significantly limit the current carrying capacities of cables. As cable temperature increases, its resistance increases thereby reducing the amount of current that can be carried.
How is kcmil calculated?
The n gauge wire’s cross sectional area An in kilo-circular mils (kcmil) is equal to 1000 times the square wire diameter d in inches (in). The n gauge wire’s cross sectional area An in square inches (in2) is equal to pi divided by 4 times the square wire diameter d in inches (in).
How do you convert kcmil to mm2?
Note: The conversion calculator below uses the conversions below:
- 1 kcmil = 506.7 × 10-3 mm.
- 1 mm2 = 1.97 kcmil.
Which is larger 4 / 0 AWG or kcmil?
Definitions. kcmil—In the North American electrical industry, conductors larger than 4/0 AWG are generally identified by the area in thousands of circular mils (kcmil), where 1 kcmil = 0.5067 mm². A circular mil is the area of a wire one mil in diameter. This is an older name for kcmil and is an identical unit.
What’s the difference between a MCM and a kcmil?
Both MCM and kcmil mean 1,000 circular mils, which is a unit used to measure the area of the circular cross section of a wire. The terms MCM and kcmil are used interchangeably by the National Electric Code to describe wires that are larger than 0000 American wire gauge.
What is the diameter of a 250 kcmil wire?
When large diameter wire sizes such as the widely used 250 kcmil and 350 kcmil wires are specified in kcmil, the diameter of the wire can be calculated from the area without using π : Thus, this wire would have a diameter of a half inch or 12.7 mm.
What is the area of a 750 MCM wire?
So, a cable area of 750 kcmil will have a diameter of 0.866 inch if it was a solid conductor. For stranded conductors the diameter will be greater depending on the stranding. MCM stands for thousands of circular mils, though the preferred form is kcmil.