What is a key factor to consider when selecting an overcurrent device?

When selecting an overcurrent device, a crucial factor to consider is environmental factors such as temperature and humidity. Overcurrent devices, like circuit breakers and fuses, are designed to operate effectively under specific environmental conditions. High temperatures can affect the thermal response of these devices, leading to premature tripping or failure. Similarly, high humidity can cause corrosion or short-circuiting, impacting the device's reliability and safety.

Understanding the environmental conditions in which the overcurrent device will be used ensures that it will function as intended and provide adequate protection against overcurrent situations. This consideration ultimately contributes to the safety and longevity of the electrical systems in which the devices are installed.