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!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Search Function
by Webmaster
01/18/17 11:13 PM
Forum Software Upgrade coming soon...
by Webmaster
01/18/17 09:17 PM
ESA Arc flash course
by frank
01/18/17 04:25 PM
Re: Fabricating Guards out of Lexan?
by frank
01/17/17 04:11 PM
Would ELV branch circuits be a good idea?
by gfretwell
01/17/17 01:26 PM
New in the Gallery:
Desk-mounted "power-board"
Top Posters (30 Days)
Webmaster 30
HotLine1 21
Ruben Rocha 16
gfretwell 12
Trumpy 12
Who's Online
1 registered (gfretwell), 0 Guests and 182 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#139208 - 10/23/03 08:01 AM GFCI
Creighton Offline
Member

Registered: 01/06/02
Posts: 56
Loc: Hayward, CA
Does anyone have information on earth leakage circuit breakers used in
South African mines around 1950?
Your help will be appreciated. Creighton

Top
Test Equipment:

Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement

#139209 - 10/23/03 08:17 AM Re: GFCI
C-H Offline


Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
Here is a paper on the development of earth leakage circuit breakers from a South African perspective.
http://www.cbi.co.za/papers/24/CBI2.pdf

Top
#139210 - 10/23/03 09:17 AM Re: GFCI
Creighton Offline
Member

Registered: 01/06/02
Posts: 56
Loc: Hayward, CA
Thanks, C-H. That is just the ticket.
Creighton

Top
#139211 - 10/24/03 11:45 AM Re: GFCI
geoff in UK Offline
Member

Registered: 12/30/02
Posts: 177
Loc: UK
That's an excellent bit of technical history. It throws a new light on things we now take for granted.

Top
#139212 - 10/24/03 12:25 PM Re: GFCI
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
It does indeed, I find these historical summaries of certain devices or practices to be very illuminating.

Top


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