For multiple cables twisted or bound together, a combined diameter circumscribing all cables can be calculated by multiplying the cable diameter of a single cable with the diameter factor. This value is also approximatively correct for three loose cables in trefoil formation.

$DC_{\mathrm{p}}$

%

$1$ | 1 cable |

$2$ | 2 cables |

$\frac{1}{-3 + 2 \sqrt{3}}$ | 3 cables (triangular) |

$\frac{1}{-1 + \sqrt{2}}$ | 4 cables (square) |