NCCER 33108 Limited-Energy Cabling Practice Test

Strain relief at cable entry points protects conductors from mechanical stress and movement that can loosen terminations or damage insulation. By securing the cable and absorbing or redirecting pulling forces where the cable enters a device, it keeps connections tight and prevents insulation damage, reducing the chance of faults or short circuits. It doesn’t increase electrical resistance, and it isn’t about guaranteeing no future rework or improving appearance—the main benefit is maintaining the mechanical integrity of the cable and its terminations.