Common questions

# What is the wire size equivalent to a circular mil?

## What is the wire size equivalent to a circular mil?

The circular mil is a unit of area used especially when denoting the cross-sectional size of a wire or cable. A circular mil is the equivalent area of a circle whose diameter is 0.001 (10-3) inch, or approximately 0.7854 millionths of a square inch.

## How do you calculate circular mils of a wire?

A circular mil is a unit of cross-sectional area that is equal to the area of a circle that is one mil (0.001 inches) in diameter. A circular mil or c.m. is therefore equal to π * ( 0.001)2 / 4 = 7.85 x 10-7 square inches.

What is wire diameter in mils squared?

A circular mil is a unit of area, equal to the area of a circle with a diameter of one mil (one thousandth of an inch or 0.0254 mm). It corresponds to approximately 5.067×10−4 mm2. It is a unit intended for referring to the area of a wire with a circular cross section.

### What is the circular mil area of 12 AWG?

AWG Cross Reference Wire Sizing Chart

Logical AWG Number AWG (and “Aught” */0 Equiv) Circular MILS
15 15 3256
14 14 4106
13 13 5178
12 12 6529

### Is 500 kcmil the same as 500 MCM?

Glossary Term: kcmil 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 do I calculate wire size?

Wire Sizing Chart and Formula

1. Calculate the Voltage Drop Index (VDI) using the following formula:
2. VDI = AMPS x FEET ÷ (% VOLT DROP x VOLTAGE)
3. Determine the appropriate wire size from the chart below.

## How is AWG calculated?

AWG: In the American Wire Gauge (AWG) system, wire size diameters can be calculated by applying the formula D(AWG)=. 005·92((36-AWG)/39) inch. For the 00, 000, 0000 etc.

## Is MCM equal to kcmil?

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.

How many amps will 500 MCM carry?

Related Resources

Size Temperature Rating of Copper Conductor
(AWG or kcmil) 60°C (140°F) 90°C (194°F)
400 KCMIL 280 380
500 KCMIL 320 430
600 KCMIL 350 475

### What’s the difference between wire gauge and circular mils?

Telephone wire is usually 22, 24, or 26. The higher the gauge number, the smaller the diameter and the thinner the wire. The Circular Mil – CM – is a unit of area used especially to denote cross-sectional size of a wire or cable. Download and print AWG – Circular mils and mm 2 chart

How big is a solid wire gauge table?

Solid Wire Gauge Table AWG Diameter (inches) Circular Mils Cross Sectional Area In Square Inches Lbs. Per 1000 Ft. 11 .0907 8230 .00646 24.9 12 .0808 6530 .00513 19.8 13 .0720 5180 .00407 15.7 14 .0641 4110 .00323 12.4

## How big is a circular AWG wire gauge?

AWG, diameter mil, circular mil, diameter in mm and area in mm 2 American Wire Gauge (AWG) Diameter ( mils) (10-3 in) Area ( circular mils) (CM) (mil2) Area (mm2) Diameter (mm) 17 45.3 2048 1.04 1.15 18 40.3 1624 0.823 1.02 20 32.0 1022 0.518 0.812 21 28.5 810 0.410 0.723

## How to calculate the size of a N gauge wire?

The n gauge wire diameter d n in millimeters (mm) is equal to 0.127mm times 92 raised to the power of 36 minus gauge number n, divided by 39: dn (mm) = 0.127 mm × 92 (36-n)/39 The n gauge wire’s cross sercional area A n in kilo-circular mils (kcmil) is equal to 1000 times the square wire diameter d in inches (in):