ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
MAAX Spas Recalls Hot Tubs and Swim Spas
by Admin. 03/13/18 10:29 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 29 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
(AU) Crabtree 5A Plug & GEC (?) Socket #163903
05/20/07 06:02 PM
05/20/07 06:02 PM
Admin  Offline
Joined: Oct 2000
Posts: 3,495

I found these items in a box of fittings I purchased from the Murray Bridge area of South Australia. The area had a 250 VDC supply prior to the 240 VAC 50Hz being standard in the area.

The three pictures show the plug & socket. Unfortunately, the socket has a bit missing around the Earth pin. The markings on the back of the socket are:

5A 250V

The manufacturers' mark looks like a horseshoe magnet with wire around it with the letters GEC with this mark.

Darren Carroll
Alice Springs, NT, Australia

[Linked Image]

[Linked Image]

[Linked Image]

Tools for Electricians:
Re: (AU) Crabtree 5A Plug & GEC (?) Socket [Re: Admin] #164027
05/23/07 12:25 PM
05/23/07 12:25 PM
pauluk  Offline
Joined: Aug 2001
Posts: 7,520
Norfolk, England
They're typical of British fittings of the 1940s/1950s era.

I mentioned elsewhere the possible switch interlock to prevent a switch being turned on until a plug was inserted, but there were definitely outlets which when mated with the correct plug did the opposite function, i.e. prevented you from removing a plug with the switch on. The recesses in the earth pin of that plug provided the function.

In the "old days" here, our Regs. specified that outlets on a D.C. supply had to be controlled by an integral or adjacent switch. There was no such requirement for A.C. outlets.


2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Attic Rat
Attic Rat
Bergen Co.,N.J. USA
Posts: 524
Joined: December 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
Trumpy 5
Popular Topics(Views)
244,398 Are you busy
181,512 Re: Forum
171,562 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.013s Queries: 15 (0.003s) Memory: 0.9434 MB (Peak: 1.0598 MB) Zlib enabled. Server Time: 2018-03-18 11:59:18 UTC