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.
Contents
- 1 What is the circular mils of a wire that has a diameter of 1?
- 2 How do you calculate the CMA of a conductor?
- 3 What instrument is used to measure the size of a wire or cable circular mil?
- 4 How many circular scale divisions are there in a micrometer?
- 5 How do you convert mils to circular mils?
- 6 What is circular mils of wire?
- 7 How many mils are in a circle?
- 8 How do you calculate CMA?
- 9 How do you calculate square mils?
- 10 Which tool is used to determine the size of a cable?
What is the circular mils of a wire that has a diameter of 1?
Definition: The area of a circle with a diameter of one mil (1/1000 inch), used to describe the cross-sectional area of a conductor. One cmil equals approximately 0.0000008 square inches.
How do you calculate the CMA of a conductor?
Multiply the width of the wire cross Multiply the width of the wire section in mils by the thickness of cross section in millimeters by the wire cross section in mils by the thickness in millimeters by 1.2732 and subtract the radius 1973.525 and subtract the radius factor included below.
What instrument is used to measure the size of a wire or cable circular mil?
Measuring. In commerce, the sizes of wire are estimated by devices, also called gauges, which consist of plates of circular or oblong form having notches of different widths around their edges to receive wire and sheet metals of different thicknesses.
How many circular scale divisions are there in a micrometer?
Figure 6: Screw Gauge using micrometer There are 50 divisions on circular scale. The least count will be 0.01 mm calculated as below.
How do you convert mils to circular mils?
Converting Circular Mil to Square Mil
- 1 Circular Mil = 0.7854 Square Mil.
- 1 Square Mil = 1.27 Circular Mils.
What is circular mils of wire?
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.
How many mils are in a circle?
There are 6,400 mils (NATO) in a circle, which is why we use this value in the formula above. Circles and mils (NATO) are both units used to measure angle.
How do you calculate CMA?
The CMA Result is calculated by multiplying the price per square foot of your lowest and highest comps to the living area of your subject property creating the range. The CMA Result is the average. Lowest price per square foot comp x number of square feet of subject property = low end of range.
How do you calculate square mils?
1 square mil is equal to:
- 1 millionth of a square inch (1 square inch is equal to 1 million square mils)
- 6.4516×10−10 square metres.
- about 1.273 circular mils (1 circular mil is equal to about 0.7854 square mils). Where 1.273 is (1÷(π÷4)) and where 0.7854 is (π÷4).
Which tool is used to determine the size of a cable?
The easiest way to actually measure the cable bundle is with a small measuring tool called an OD-Tape. OD-Tapes are used in the electrical field and plumbing fields to measure both length and overall outside diameter.