The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
0 registered (), 259 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#26630 - 06/17/03 09:48 AM Sub Panel Confusion
ThinkGood Offline

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
Greetings, all.

I was visiting dad on Father's Day and was admiring some work my folks are having done in their kitchen.

I remember when the new service was put in, and the electrician drove a ground rod (perhaps two, I don't recall). This would have been somewhere in the late 1980s or early 1990s.

Then, dad had a sub panel added (right next to the main panel) to allow for more breakers. (Early 1990s.)

What I noticed now is that the sub panel's ground and neutral conductors are not isolated from each other. If I recall correctly, the grounds and neutrals are all on the same bus bar (terminal bar?).

I thought they were supposed to be isolated? Or does that only apply to a garage where an additional, separate ground rod is required?

(In the main panel, the neutral and ground wires also go to the same bar, but I believe that was from before the code requirement for separate (but bonded) neutral and ground bus bars...???)

My main concern is safety, of course.

Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#26631 - 06/17/03 11:48 AM Re: Sub Panel Confusion
GEO Offline

Registered: 03/12/03
Posts: 50
Loc: Lancaster,Pa
NEC 2002 try this while you are waiting
225.36--- 250.32b1---250.32b2 GEO

#26632 - 06/17/03 03:39 PM Re: Sub Panel Confusion
mj Offline

Registered: 06/10/02
Posts: 188
Loc: meriidian, ms
was not a requirment to separare neutral from ground in the 1980's ?

#26633 - 06/18/03 04:01 AM Re: Sub Panel Confusion
Redsy Offline

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
250.142 (A) & (B) sum it up.


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals