ntoo ncej pigtail insulator tau teeb tsa ntawm tus ncej ntoo los ntawm cov ntsia hlau, thov saib cov duab hauv qab no. Yog tias koj xav kom tus neeg xyuas pib nyob deb ntawm cov ntoo tshaj 20cm, nws yog qhov zoo dua los siv cov ntoo ncej pigtail insulator, qhov ntev ntawm cov ntoo ncej pigtail insulator tuaj yeem kho tau.

Feem ntau, peb muaj 25cm ntoo ncej pigtail insulator thiab 40cm ntoo ncej pigtail insulator, kuj peb muaj ob chav bracket pigtail insulator, ob chav bracket ntoo ncej pigtail insulator tuaj yeem ua tus neeg xyuas pib ntawm ib leeg ntawm 80cm.