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

ECN Shout Chat
Top Posters(30 Days)
Admin 19
Recent Posts
fuse rejectors
by NORCAL. 03/29/17 01:44 AM
Old decora style outlets
by NORCAL. 03/29/17 01:41 AM
NFPA stuff
by gfretwell. 03/28/17 08:08 PM
Anyone hiring inspectors?
by HotLine1. 03/27/17 08:03 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,745 Are you busy
166,650 Re: Forum
160,799 Need opinion
Who's Online Now
0 registered members (), 65 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#139208 - 10/23/03 11:01 AM GFCI  
Creighton  Offline
Member
Joined: Jan 2002
Posts: 59
Hayward, CA
Does anyone have information on earth leakage circuit breakers used in
South African mines around 1950?
Your help will be appreciated. Creighton


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 11:17 AM Re: GFCI  
C-H  Offline
Member
Joined: Sep 2002
Posts: 1,497
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


#139210 - 10/23/03 12:17 PM Re: GFCI  
Creighton  Offline
Member
Joined: Jan 2002
Posts: 59
Hayward, CA
Thanks, C-H. That is just the ticket.
Creighton


#139211 - 10/24/03 02:45 PM Re: GFCI  
geoff in UK  Offline
Member
Joined: Dec 2002
Posts: 180
UK
That's an excellent bit of technical history. It throws a new light on things we now take for granted.


#139212 - 10/24/03 03:25 PM Re: GFCI  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
It does indeed, I find these historical summaries of certain devices or practices to be very illuminating.



Member Spotlight
richard
richard
L.I. New York
Posts: 94
Joined: August 2003
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 14 (0.002s) Memory: 0.7641 MB (Peak: 0.9000 MB) Zlib enabled. Server Time: 2017-03-29 17:09:50 UTC