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
Webmaster > Admin
by Trumpy
01/20/17 08:29 PM
Live Chat Feature
by Admin
01/20/17 07:36 PM
Safety at heights?
by gfretwell
01/19/17 07:16 PM
failed home inspection.
by gfretwell
01/19/17 07:03 PM
Old Bath Fan
by gfretwell
01/19/17 01:38 AM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 34
HotLine1 20
Ruben Rocha 17
Trumpy 16
gfretwell 15
Who's Online
4 registered (NORCAL, ComputerWizKid, Trumpy, Admin), 176 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#23683 - 03/24/03 06:23 PM Old 3way switched neutrals
Don Bonnet Offline
Junior Member

Registered: 03/24/03
Posts: 2
Loc: Silver Spring, MD USA
Does anyone know where I can get a wiring diagram for the old "switched neutral" 3 way wiring?

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....

#23684 - 03/25/03 04:34 AM Re: Old 3way switched neutrals
wocolt Offline

Registered: 12/06/02
Posts: 117
The ones I have seen, the power is at the fixture, and the switchleg is (as it would be normally) but the neutral is switched.
I am sure there are other schemes.


#23685 - 03/25/03 08:13 AM Re: Old 3way switched neutrals
CTwireman Offline

Registered: 02/07/02
Posts: 839
Loc: Connecticut, USA
Don, are you talking about the old "Chicago" Or Carter system 3 ways?

#23686 - 03/25/03 12:51 PM Re: Old 3way switched neutrals
russ m Offline

Registered: 02/22/03
Posts: 165
Loc: Burbank,IL,USA
I'm not sure what you're looking for, but this is a illegal threeway.

Tie the hot to a traveler terminal, the neutral to a traveler terminal, run the common to the light. Do the same at the other switch. Both commons from each switch go to the light, hot and neutral run between switchs and are tied to the traveler terminals only.


[This message has been edited by russ m (edited 03-25-2003).]

#23687 - 03/25/03 02:41 PM Re: Old 3way switched neutrals
zapped208 Offline

Registered: 02/18/03
Posts: 201
Loc: Somewhere in USA
This is what we here in the northeast call a HOT 3-way. Most common place you will find this type of 3-way set up is at dairy farms with a center pole service, and there is a set of floods on the pole and milk house. The 3-ways are fed at the house and from the barn panels. Russ M has the correct wiring of the 3-ways. The 3-ways MUST be fed from the same phase at house and barn. So when working on this type of set up, you must turn off power at house and the barn.
Shoot first, apologize later.....maybe

#23688 - 03/25/03 06:31 PM Re: Old 3way switched neutrals
harold endean Offline

Registered: 02/16/02
Posts: 2248
Loc: Boonton, NJ

I e-mailed you 4 old diagrams out of an old wiring book. See if they can help you. I am not sure if I can post them here on ECN. I might try though.


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