Jump to content

breaker box green grounding screw


james prosise
 Share

Recommended Posts

Without the screw, the combined neutral/grounding bar of most (if not all) load centers "floats" from the enclosure.

The intent of the green bonding screw (or strap) is to protect the metallic panel box if it were to become accidently energized. The screw provides a reliable path back to the utility grounded conductor for that fault current. Then, rather than waiting for someone to get electrocuted by touching the hot panel, the ground fault would be cleared by one of the OCPDs in the normal way (a breaker would trip).

Nothing to do with electrolysis.

Link to comment
Share on other sites

  • 9 years later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...