Pin insulator
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A pin insulator is an electrical insulator that isolates a wire from a physical support such as a pin on a telegraph or utility pole. It is a formed, single layer shape that is made out of a non-condu
An insulator of a telephone transmission line
A pin insulator ceramic plate used for 20 KV lines
A sparkling CD 145 or "beehive" insulator from the telegraph era made by the Brookfield Glass Company circa 1882.
The same snowy CREB 145 sitting on its side
Strain insulator
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A strain insulator is an electrical insulator that is designed to work in mechanical tension, to withstand the pull of a suspended electrical wire or cable. They are used in overhead electrical wiring
Pin insulator
…the number of insulators used depends upon the application's voltage. Pin insulators are one of three types of overhead insulators, the others being strain insulators and suspension insulators. Unlike the others, pin insulators are directly connected to the physical support compared to being suspended from the wire…
Strain insulators on high-voltage power lines
Low-voltage "egg"-type strain insulator, used in utility-pole guy cables to prevent any voltage on the guy caused by an electrical fault on the pole from reaching the lower sections accessible to the public
High-voltage strain insulators used on 66 kV, 230 kV and 115 kV AC lines. The number of insulator skirts varies with voltage and atmospheric conditions.
Pyrex-glass strain insulator used for radio antennas