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
ghost307 7
HotLine1 7
renosteinke 6
Potseal 4
Who's Online
1 registered (gfretwell), 318 Guests and 3 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#84911 - 05/15/03 12:32 PM Defintions in Article 725
boxford Offline

Registered: 03/10/03
Posts: 15
Loc: St. Paul, MN, USA
I was recently reviewing the definitions in Article 725.2, in particular the Class 1 Circuit, Class 2 Circuit, and the Class 3 Circuit. By reading the definitions it was still unclear to me exactly what all of these circuits are? If someone could tell me how the governing bodies decide the requirements to differentiate the classes and give me a watered down interpretation of what the definitions mean that would be fantastic.

2014 / 2011 NEC & Related Books and Study Guides
#84912 - 05/16/03 02:28 PM Re: Defintions in Article 725
dana1028 Offline

Registered: 01/09/02
Posts: 163
Loc: San Carlos, CA
It's a lot easier to point you 'in the right direction' than try to explain it to you.

Check out the EC&M Magazine website ( have quite a number of articles on this subject that should help clear this up for you. This site has a 'search' engine that will take you to back issues for many can search by subject, article title, author, or date.

Aug. 2000 - 'Classifying & Using Class 1,2,3 Circuits' by James Stallcup is very good.

Jan., Feb., & Dec. of 2001 - Mike Holt has several articles on 'Technology Wiring' - this includes Class 1,2,3 wiring circuits.


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