Final answer:
The correct answer is (a) Maximum. Conductors should not exceed the maximum temperature limit set for their material and design specifications to ensure safety and prevent potential hazards. Household wiring is generally built with a safety margin that would prevent ordinary use from causing a wire's resistance to double due to excessive heating.
Step-by-step explanation:
Conductors within flexible cords and flexible cables shall not be associated together in such a way that the maximum temperature of the conductors is exceeded. The correct answer is (a) Maximum.
Conductors can heat up due to the electric current flowing through them. If the current is high, it can cause the temperature of the conductors to rise, which might exceed the maximum temperature that the conductor material can safely handle. This is a critical consideration in the design and use of flexible cords and cables to prevent damage to the conductors, insulation failure, or even potential fire hazards.
Household wiring typically does not cause a wire, originally at 20.0°C, to double its resistance as it is designed to handle the load with a substantial safety margin, and therefore, the occurrence of such high temperature increases that would double a conductor's resistance under ordinary circumstances is highly unlikely.