What type of cable insulation is typically used for low voltage applications?

Varnish-cambric insulation is commonly used for low voltage applications due to its unique properties. This type of insulation features a cotton or fabric base that is impregnated with a varnish, providing effective electrical insulation while being flexible and durable. It is particularly suitable for low voltage environments where a balance of electrical and mechanical integrity is needed without the need for heavier or more expensive insulation materials.

The other insulation types typically serve different purposes or applications. Cross-linked polyethylene insulation is known for its high thermal stability and resistance to environmental factors, making it more suitable for higher voltage applications or environments where enhanced mechanical protection is required. Impregnated-paper insulation is primarily used in applications dealing with high voltages, such as transformers and capacitors, due to its excellent dielectric properties. Silicone rubber insulation, on the other hand, is often utilized for its exceptional resistance to extreme temperatures and environmental conditions, making it ideal for specialized or high-performance scenarios rather than standard low voltage use.