Advantages And Disadvantages Of Plastic Electrical Boxes

- Mar 31, 2018-

Plastic electrical boxes, sometimes called junction boxes, have plenty of pluses, including low cost, convenience, and ease of installation, but they're not the best choice for every application. When plastic doesn't make sense, the standard alternative is a metal box. Here's a look at the places where plastic is the right and the wrong choice. 


Plastic boxes are nonconductive, which means they won't conduct electricity if they're touched by a live wire or a fixture or switch with a short circuit or fault.

This also means you don't have to ground the box with a short wire (called apigtail) connected to the circuit's ground wire. Metal boxes must be grounded.