Premises cables must be rated for pull strength, bend radius, weight in cable tray, and what additional property?

• A. Color
• B. Flexibility
• C. Diameter
• D. Fire retardant

Answer: (D)

Fire safety performance is what this item is measuring. Premises cables used inside buildings must not only withstand mechanical stresses like pull strength and bend radius and handle the weight in a cable tray, but also have fire-retardant properties. Fire retardant means the cable jacket and insulation resist ignition and slow flame spread, helping to limit heat and smoke propagation during a fire. This safety attribute is essential in enclosed spaces where cables can contribute to flame spread and toxic smoke. The other options—color, flexibility, and diameter—are not safety-rated fire performance characteristics required by standard practice in this context.