What kind of drill is commonly used for installations when electricity is not available?

A pneumatic drill is the appropriate choice for installations where electricity is not available because it operates using compressed air rather than electric power. This makes it ideal for use in situations where electrical supply may be limited or in environments where using electric tools could pose a safety hazard, such as in wet conditions or in areas with flammable materials.

Pneumatic drills are particularly noted for their power and efficiency, allowing them to handle a variety of drilling tasks effectively. The use of compressed air also means they can provide continuous operation as long as there is an adequate air supply, making them a versatile tool on job sites without access to electrical outlets.

The other types of drills mentioned, such as impact drills, rotary drills, and hammer drills, typically rely on electricity or battery power, making them unsuitable for non-electrical environments.