ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 260 guests, and 20 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#128502 04/29/03 03:08 PM
Joined: Sep 2002
Posts: 1,498
Likes: 1
C
C-H Offline OP
Member
APC which manufactures UPS units has a white paper called Neutral Wire Facts and Mythology.

It's rather lengthy, but I felt it could be recommended reading for people who are convinced of the importance of polarisation. However, I would welcome your input on this. Is it the definite answer or is it way off?


[This message has been edited by C-H (edited 04-29-2003).]

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

#128503 04/29/03 05:33 PM
Joined: Jul 2001
Posts: 599
J
JBD Offline
Member
Very basic explanations using "laymen" terminology. But overall no factual areas that are worth fighting over.

Arguing about specific technical terms with a non-technical person is usually not a winable, nor necessary, action.

#128504 04/29/03 06:02 PM
Joined: Nov 2002
Posts: 174
K
Member
I disagree with the statement:
____________________________________________
The actual answer as to why plugs are polarized in North America is found in a ubiquitous appliance: the screw-in incandescent lamp...All modern two prong appliances and office equipment are designed so that they can be plugged in either way and they just use the standard plug,
which happens to have the differently sized prongs.
____________________________________________

In my experience, lamp cords are the least likely to have polarized plugs. Electronic equipment such as televisions are the ones with two prong polarized plugs. They are also the ones to have warnings on the plugs that tell you not to defeat the polarizing.

#128505 04/29/03 11:05 PM
Joined: Nov 2000
Posts: 2,148
R
Member
Quote
In my experience, lamp cords are the least likely to have polarized plugs.
While other items may have polarized plugs, all listed lamps with a screw shell socket will have a polarized plug.
Don


Don(resqcapt19)
#128506 09/05/03 01:16 PM
Joined: Jul 2003
Posts: 36
J
Member
Quote
quote:
--------------------------------------------------------------------------------
In my experience, lamp cords are the least likely to have polarized plugs.
--------------------------------------------------------------------------------


While other items may have polarized plugs, all listed lamps with a screw shell socket will have a polarized plug.
Don

New products sold in todays market and for at least last decade or so have polarized plugs. I don't see anything sold without them.

What Kale may be referring to is older lamps still found in many homes. There is no requirement to upgrade them.

#128507 09/07/03 09:25 AM
Joined: Aug 2001
Posts: 7,520
P
Member
Allowing that the document is directed toward the layman, it seems fair.

It's good to note the reference to isolation transformers and the explanation that inclusion of these on the power feeds will not eliminate problems with ground loops.

The latter requires either electrical isolation of data paths between devices (e.g. opto-isolators) or the separation of protective and signal grounds.


[This message has been edited by pauluk (edited 09-07-2003).]

#128508 09/08/03 12:56 AM
Joined: Oct 2000
Posts: 2,723
Likes: 1
Broom Pusher and
Member
Have downloaded the .PDF file, and will read up on it.

Scott35


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5