What factor must be considered while selecting conductors for an installation?

When selecting conductors for an installation, the type of insulation used is a critical factor to consider. The insulation material is essential because it determines how the conductor can be used in different environments, its temperature rating, and its resistance to various chemicals and moisture. This affects the cable's performance and safety, particularly in situations where exposure to heat, cold, or corrosive environments might occur.

For example, certain insulation types are necessary for installations in wet locations, while others are required for high-temperature environments. Additionally, some insulation materials can provide better protection against physical damage, which is crucial for underground or industrial applications. Therefore, the right insulation ensures not only compliance with electrical codes but also the reliability and longevity of the electrical system.