# Dimensions of a Stranded Wire

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A wire strand consists of a central core wire with a number of helical wires wrapped around it. Its principal characteristics are the helix (or winding) angle and the radius of the wires.

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Contributed by: Erik Mahieu (July 2015)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

A helical cylinder with radius and helix angle can be described in parametric coordinates, as functions of and :

where is the helix radius, is the helix angle, and is the cylinder radius.

The cross section of a helical cylinder with the horizontal is given in terms of the parametric coordinate , with the helix radius taken to be 1:

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