Ee, mkpuchi mkpuchi osisi kwesịrị ekwesị iji wuo ngere eletriki dị mfe, ọ dị nfe ịfanye insulator osisi n’ime igbe osisi, wee bulie polywire, waya na insulator osisi, na -ewu usoro ala ma jikọọ na onye na -enye ume, nsu eletrik dị mfe dị njikere maka ojiji.

Maka insulator osisi, enwere ụdị abụọ, ụdị A na ụdị C
Pịnye mkpuchi mkpuchi osisi nwere isi nkwado kwụ ọtọ n’ime. Nke a bụ ụdị akụ na ụba, ịdị arọ ya dị gburugburu 18g.
Insulator Pịnye C osisi nwere isi nkwado na -aga n’ihu n’ime. nke a na -adịte aka, ịdị arọ ya dị ihe dị ka gram 25.

Pịnye A osisi Post insulator:

Ụdị C Wood Post Insulator: