What is the main difference between indoor and outdoor switchgear?

The main distinction between indoor and outdoor switchgear lies in their design and application concerning environmental exposure. Indoor switchgear is engineered to operate within controlled environments, typically found in substations, industrial plants, or buildings where protection from external conditions is provided. This design minimizes exposure to dust, moisture, and thermal variations, allowing for safer and more efficient operation in enclosed spaces.

On the other hand, outdoor switchgear is specifically built to endure various weather elements, including rain, snow, extreme temperatures, and ultraviolet radiation from sunlight. It is constructed with materials and protective features that enable it to function reliably in open-air conditions, which are often subject to harsher environmental factors. This makes outdoor switchgear suitable for installations in substations or distribution systems situated in exposed locations.

The other choices indicate misunderstandings about the capabilities and functionalities of indoor and outdoor switchgear. While power ratings can vary, they are not strictly defined by the designation of indoor or outdoor. Additionally, indoor switchgear may not necessarily occupy more space than outdoor switchgear; it depends on the specific design and application. The distinction primarily revolves around the ability to handle environmental conditions.