the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > substance or contrivance > parts of (4)
the insulating cap of a telegraph pole.
An insulated electrical connector (often with a porcelain body) used for making a sealed joint between conductors, as between an underground cable…
A ring or wreath of rope, spec. one consisting of a single strand laid three times round. A washer used to insulate electric conductors passing…