Table of Contents
What is a knockout breaker?
Breaker knockout ( filler plate ) missing Breakers or rectangle knockouts that have been removed from a panel leaves a gap where a person or child could stick something in. Terminology – rectangle filler pieces are often called knock-outs, panel cover twist outs or breaker filler plates.
What is a knockout in an electrical panel?
Knockouts are partially stamped, quarter-size openings in the electrical boxes that service such things as outlets and switches. Once removed, a knockout allows electrical wires to be run in and out of the box. Photo: homedepot.com. mp3 file.
How do you fill missing knockouts in electrical box?
How to fix a missing knockout plug. First, determine the size of the missing knockout hole and subtract 3/8″ to figure out what size knockout plug you’ll need. For example, if you have a 7/8″ hole, you’ll need a 1/2″ knockout plug. Next, go buy some knockout plugs.
What size are the knockouts on a breaker box?
The steel square box features welded construction. Box includes 1/2 inch and 3/4 inch knockouts for versatile applications.
Is it acceptable to have missing breakers from an electrical panel box?
National Electrical Code simply states that all openings must be closed. An unused breaker or cover likely both meet that requirement, so either should be fine.
How does a knockout tool work?
“The Force Logic system speeds the knockout process by allowing punches and dies to be quickly aligned on the work surface without the weight of the tool. The user then snaps the tool onto the punch-and-die assembly and pulls the trigger to punch the hole.”
How do you remove a knockout from a plastic electrical box?
How to Remove Electrical Knockouts on a Plastic Enclosure
- Place a flat-head screwdriver into the slot of the electrical box knockout that is to be removed.
- Hit or tap the end of the screwdriver to remove the knockout and dislodge the rest of the knockout by hand if needed.
What is knock out size?
| ALL SIZES ARE INCHES | KNOCK OUT SIZE | |
|---|---|---|
| 3/8 | 18 | 0.718 |
| 1/2 | 14 | 0.875 |
| 3/4 | 14 | 1.109 |
| 1 | 11-1/2 | 1.375 |