Which routing method would most likely cause chafing?

Which routing method would most likely cause chafing?

• A. Routing wires straight
• B. Routing along smooth surfaces
• C. Routing behind panels
• D. Routing wires bended or twisted across a hinge

Answer: (D)

Chafing happens when wire insulation wears away from friction against surfaces that rub or flex, especially where movement occurs. Routing wires across a hinge and twisting or bending them there causes repeated flexing and rubbing as the hinge moves. Each operation of the hinge can press and slide the wire against edges or surfaces, rapidly eroding insulation and risking exposed conductors or shorts. In contrast, routing straight, along smooth surfaces, or behind panels tends to limit movement and reduce contact with rough edges, provided there are proper supports and edge protections. So the setup where wires are bent or twisted across a hinge creates the most opportunities for chafing.

Chafing happens when wire insulation wears away from friction against surfaces that rub or flex, especially where movement occurs. Routing wires across a hinge and twisting or bending them there causes repeated flexing and rubbing as the hinge moves. Each operation of the hinge can press and slide the wire against edges or surfaces, rapidly eroding insulation and risking exposed conductors or shorts. In contrast, routing straight, along smooth surfaces, or behind panels tends to limit movement and reduce contact with rough edges, provided there are proper supports and edge protections. So the setup where wires are bent or twisted across a hinge creates the most opportunities for chafing.