missing breaker: How to fill electrical knockout holes with inpunity - 03/12/13 08:07 PM
One of the most common Truth-in-Housing repair items is an unfilled opening in an electrical box or panelboard.  If you walk through the garage or basement of just about any old Minneapolis or Saint Paul home, you'll probably be able a few of these.
 
The national electric code says that unused openings in such equipment need to be closed.  Covering these openings helps to prevent accidental shocks (think of kids), helps to prevent hot sparks from escaping if something goes wrong inside the enclosure, and helps to prevent pests from entering.  It happens.

How to fix a missing knockout plug First, … (17 comments)