ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
sparky 5
Recent Posts
Permit Snafus...AHJs and Contractors Jump in
by sparky. 04/29/17 05:59 PM
201 volt equipment?
by bigpapa. 04/29/17 12:15 AM
Schneider LC1D09
by jraef. 04/28/17 11:05 PM
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,977 Are you busy
169,808 Re: Forum
163,015 Need opinion
Who's Online Now
0 registered members (), 44 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Gallery
Next Gallery
Print Thread
Rate This Thread
Images In This Group
This old outlet won't meet code
by wa2ise on 11/03/09 02:02 AM

The polarity is flipped from one side to the other, thus it likely won't be listed... laugh

#190030 - 11/03/09 09:43 PM Re: This old outlet won't meet code [Re: wa2ise]  
aussie240  Offline
Joined: Jul 2005
Posts: 223
Blue Mountains, NSW, Australia
This is reminiscent of the double adaptors made in Australia until the 1950's that reversed the live and neutral pins on one outlet. But, at the time there was no official polarity given to the two angled pins. Convention was to always treat both pins as live (hence the double pole switches in portable appliances at the time), so it wasn't really that much of a safety issue.
This US example looked illogical until I read the patent; apparently the design is intended for DC use and saves having to rewire the plug the other way round if the appliance doesn't work on a certain polarity (eg. radio used on 120V DC mains).
It makes you wonder what the point of polarised sockets is in the first place if you can defeat it just by plugging into the adjacent outlet.

Super Rod Cable Installation Tools

Super Rod Cable Rod System
Super Rod Cable Rod System -
Best Product of the Last 50 Years by members of NICEIC

#190038 - 11/03/09 11:30 PM Re: This old outlet won't meet code [Re: aussie240]  
wa2ise  Offline
Joined: Nov 2002
Posts: 782
Oradell NJ USA
Originally Posted by aussie240
This is reminiscent of the double adaptors made in Australia until the 1950's that reversed the live and neutral pins on one outlet.

We had crowfoot outlets that look like they did this as well in the USA. But I used a continuity checker function on my DVM and saw that they crisscrossed the connections inside so both outlets would be correctly wired. I posted a picture of such a duplex outlet as a separate thread in this forum.

Last edited by wa2ise; 11/04/09 03:19 AM.

#190588 - 11/25/09 01:48 AM Re: This old outlet won't meet code [Re: wa2ise]  
RobertL  Offline
New Member
Joined: Nov 2009
Posts: 1
OK, had to register, I love that outlet! But it simply does not make sense that DC loads of the day would need polarity reversed, unless there is an item I can't think of at the moment. I collect antique radios, and radios that plugged into the mains outlets did not come on the scene till the late 20's, and AC/DC radios did not come around till the early 30's. Universal motors, lights, heaters, don't care about DC either. Were AC plugs polarized by 1922?


Member Spotlight
Posts: 70
Joined: June 2012
Show All Member Profiles 

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 18 (0.003s) Memory: 0.7636 MB (Peak: 0.9110 MB) Zlib enabled. Server Time: 2017-04-30 07:11:28 UTC