ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Changing a Bulb
by gfretwell. 07/14/18 03:12 PM
Tray cable?
by gfretwell. 07/11/18 10:18 PM
Eaton Heavy Duty 30A and 60A Safety Switches
by Admin. 07/11/18 09:49 PM
ORTOVOX Recalls Avalanche Transceivers
by Admin. 07/11/18 09:44 PM
Tingle off the water spigot
by gfretwell. 07/08/18 12:58 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
1 registered members (ampherder), 16 guests, and 27 spiders.
Key: Admin, Global Mod, Mod
Previous Gallery
Next Gallery
Print Thread
Rate Thread
This old outlet won't meet code #190013
11/03/09 02:02 AM
11/03/09 02:02 AM
flippedpolarity.jpg
Joined: Nov 2002
Posts: 787
Oradell NJ USA
W
wa2ise Offline OP
Member
This old outlet won't meet code

The polarity is flipped from one side to the other, thus it likely won't be listed... laugh
3 Comments
Re: This old outlet won't meet code [Re: wa2ise] #190030
11/03/09 09:43 PM
11/03/09 09:43 PM
A
aussie240  Offline
Member
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 -
Voted
Best Product of the Last 50 Years by members of NICEIC

Re: This old outlet won't meet code [Re: aussie240] #190038
11/03/09 11:30 PM
11/03/09 11:30 PM
W
wa2ise  Offline OP
Member
Joined: Nov 2002
Posts: 787
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.
Re: This old outlet won't meet code [Re: wa2ise] #190588
11/25/09 01:48 AM
11/25/09 01:48 AM
R
RobertL  Offline
New Member
Joined: Nov 2009
Posts: 1
Arkansas
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?

Robert


Featured:

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

 

Member Spotlight
sbi
sbi
indiana
Posts: 47
Joined: March 2008
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
Popular Topics(Views)
248,100 Are you busy
185,547 Re: Forum
174,846 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.023s Queries: 18 (0.004s) Memory: 0.9639 MB (Peak: 1.1128 MB) Zlib enabled. Server Time: 2018-07-17 11:47:59 UTC