Maximum bend radius for a wire bundle is no more than how many times the outside diameter of the largest wire?

Maximum bend radius for a wire bundle is no more than how many times the outside diameter of the largest wire?

• A. 5x
• B. 10x
• C. 15x
• D. 20x

Answer: (B)

When routing a bundle of wires, you must avoid bending so tightly that insulation and individual conductors get stressed or damaged. The standard for bundles specifies that the bend radius should be no tighter than ten times the outside diameter of the largest wire in the bundle. This ensures all wires can share the bend without crowding, reducing the risk of insulation damage, conductor fatigue, or future reliability issues. Five times the largest diameter would be a tighter bend and could risk crushing or nicking inner conductors. Fifteen or twenty times would be more forgiving than required by the standard and not the maximum limit specified. The correct limit is ten times the largest wire diameter.

When routing a bundle of wires, you must avoid bending so tightly that insulation and individual conductors get stressed or damaged. The standard for bundles specifies that the bend radius should be no tighter than ten times the outside diameter of the largest wire in the bundle. This ensures all wires can share the bend without crowding, reducing the risk of insulation damage, conductor fatigue, or future reliability issues.

Five times the largest diameter would be a tighter bend and could risk crushing or nicking inner conductors. Fifteen or twenty times would be more forgiving than required by the standard and not the maximum limit specified. The correct limit is ten times the largest wire diameter.