The electrical insulators are devices using to isolate electrical conductor from other conductive materials, without leak currents. They are mainly used in electrical installations: they are strong, safe and cheap.
Kinds of electrical insulators
There are insulators for indoor or outdoor environment, bushing or supporting insulators, stiff wire or suspended insulators; insulators for low, medium, high voltage; telegraphic or telephonic insulators and terminal devices. Electrical insulators are traditionally made by glass and ceramic but since the 70s and 80s new composite materials of synthetic origin have been used to produce them.
Shapes and sizes of electrical insulators are extremely variable and their pleasing and original appearence gave birth to particular collection projects about electrical insulators.
At the moment there are many kind of products: long chains of suspended insulators of several meters which weigh more then 100 Kg used for high and extra-high voltage lines; little spools about 1 cm. with mostly domestic use. Today, the electrical insulators that are found in electrical installations of the old houses
are reused by a lot of people for their vintage features.