Type SO cord has ___ insulation.

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Study for the Independent Electrical Contractors (IEC) Year 4 Test. Use flashcards and multiple-choice questions, each with hints and explanations. Prepare effectively for your exam!

Multiple Choice

Type SO cord has ___ insulation.

Explanation:
Type SO cords use a crosslinked rubber insulation (neoprene), which is thermoset. Once cured, thermoset insulation resists heat, oils, and weathering and won’t melt or deform under service conditions, making it the right choice for flexible, oil-resistant cords. Thermoplastic insulation would soften with heat, and nylon isn’t used for this cord type; while rubber describes the material family, the required insulation form here is thermoset.

Type SO cords use a crosslinked rubber insulation (neoprene), which is thermoset. Once cured, thermoset insulation resists heat, oils, and weathering and won’t melt or deform under service conditions, making it the right choice for flexible, oil-resistant cords. Thermoplastic insulation would soften with heat, and nylon isn’t used for this cord type; while rubber describes the material family, the required insulation form here is thermoset.

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