Complex sentence: The pin insulator is desidned to support the weight of the wire while providing electrical insulation of the wire from the supporting pin, I pin insulator is almost always deployed in the open air, so isolation when wet is a major consideration.
Split into simpler sentences: The pin insulator is desidned to support the weight of the wire while providing electrical insulation of the wire from the supporting pin. Pin insulators are almost always deployed in the open air, so isolation when wet is a major consideration.