In general, porcelain is not a conductor. It is considered an insulator. It is possible to make ceramics that will conduct, but the porcelain we normally find is a good insulator.

When shipping fragile items like porcelain be sure to pack with peanuts as well as air bubbles.

The hot screw on a Porcelain socket or and electrical is the Gold screw. The Silver screw is the neutral

Rubber, Glass, Plastic, Porcelain, etc.

Some companies that sell commercial electrical supplies include Best Buy and Office Depot. Home Depot would also carry electrical supplies for the home, and I believe stores like Walmart and Target would also sell popular electrical supplies for very reasonable prices.