Cable Bend Radius Minimum

Minimum inside bend radius as a multiple of cable OD per manufacturer bulletins.

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Formula and source

Min bend radius = multiplier × cable OD; multipliers per cable type (THHN/XHHW 8x, MC 7x, control 6x, coax 10x, fiber 20x).

Manufacturer minimums (Southwire, AFC, Belden, Corning); NEC 300.34 by name.

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