How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
When was it first required that neutrals and grounds be separated (not bonded) on any panel past the main service panel?
Sunday, June 17, 2018
“Is that some new code thing that wasn’t required when this old house was built?” Actually, the code standard for neutrals and grounds to be bonded only at the main service panel—and nowhere else—dates back to the 1923 edition of the National Electrical Code (NEC). So neutrals and grounds on the same bonded bus bar at a subpanel, or neutral and ground bus bars with a bonding connection between them at a subpanel, is definitely not “grandfathered in” as alright.
For the electrical safety reason behind the code requirement, see our blog post Why is it unsafe to bond neutral and ground wiring at subpanels?
• • • • • • • • • • • • • • • • • • • • • • • • • •
Here’s links to a collection of our other blog posts about ELECTRIC PANELS:
of Blog Posts
Top 5 results given instantly.
Click on magnifying glass
for all search results.
Buying a home in North/Central Florida? for a team inspection by two FL-licensed contractors and inspectors. Over 8,500 inspections completed in 20+ years. In a hurry? We will get it done for you.