According to NFPA 70, what factor influences the choice of insulation for conductors?

The choice of insulation for conductors is significantly influenced by the environment in which the conductors will be installed and operated. Different environments present varying challenges, such as exposure to moisture, temperature extremes, chemicals, and physical abrasion. For example, in a wet environment, insulation materials must be selected to prevent moisture-related issues like corrosion and short circuits. In contrast, environments with high temperatures may require insulation that can withstand prolonged exposure without degrading or losing its insulating properties.

Selecting the appropriate insulation based on environmental factors ensures safety, reliability, and compliance with electrical codes like NFPA 70, which governs the installation of electrical wiring. This focus on the environment helps to minimize hazards while also enhancing the longevity and effectiveness of the electrical system.