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## What is the formula to calculate the size of a wire or cable?

Calculating Wire/Cable Size formula for Three Phase Circuits Wire Circular mils = √3 x 2 x ρ x I x L / (% Allowable Voltage drop of source voltage)

## How do you calculate electrical wire size?

Always draw out the problem. Calculate the horizontal distance (s): Left to right straight calculation Right to left straight calculation Left to right angle or U pull calculation Right to left angle or Calculate the vertical distance (s): Top to bottom straight calculation Bottom to top straight calculation Top to bottom angle or U pull calculation Bottom to top angle or

## How do you calculate the diameter of a wire?

Click Diameter to wire gauge.

## How do you determine wire gauge size?

The method of determining wire gauge sizes follows naturally from the way in which manufacturers make wire. A metal rod is heated and drawn through a hole (drawing die) that’s smaller than the original wire. The gauge of the wire is determined by the number of draws needed to produce wire of the desired size.

## What gauge wire do you use?

In standard usage, though, the wire conductors in conduit or NM cable for household wiring will be 14-, 12- or 10-gauge wire that is a solid copper conductor. While circuit breakers or fuses offers good protection against overloading wires and overheating them, they are not absolute protection.

## How to know the size of a cable?

Look at the insulation on the cable. Search for text written on the insulation.

## How do you calculate conductor size?

The formula for calculating the size of conductors for direct currents, where the length, load, and loss in volts are given, is as follows: The size of conductor (in circular mils ) is equal to the current multiplied by the distance (one way) multiplied by 21.6, divided by the loss in volts; or, CM= C X D X 21.6.(1)

## How to calculate the cable size?

Here are 5 steps: Find the OD measurement of a single conductor of one of the wires. This measurement will probably be in inches or millimeters. Utilize a standard formula to calculate the cross-section area of that one wire using the area formula for a circle, i.e., area equals the square of the diameter multiplied Count the number of wires in the bundle.