On Friday, March 8, 2019 at 9:53:21 PM UTC-5, Clare Snyder wrote:
On Fri, 8 Mar 2019 11:47:32 -0800 (PST), DerbyDad03
wrote:

On Friday, March 8, 2019 at 1:25:44 PM UTC-5, Leon wrote:
On 3/8/2019 11:12 AM, -MIKE- wrote:
On 3/8/19 11:03 AM, Leon wrote:
I saw this and was wondering how long it has been around and how does
it work.Â* What is it made out of to deliver electricity?

https://www.lowesforpros.com/pd/Sout...e-Roll/1193433


What am I missing?Â* Are they actually talking about the casing?Â* The
casing is not wire...

I believe the Non-Metallic (NM) means the sheathing is made of plastic,
not metal.
There are times when it's required to have metal-sheathed wire and times
when you can use Romex, non-metallic sheathed wire.

So that's the designation.Â* MC for metal clad, and NM for non-metallic.



Understood but it specifically says non metallic "wire". And I do not
ever recall Romex ever being called metallic or non metallic.


Interesting story (at least to me) about NM wire.

I'm sure that most of us are familiar with the "cloth covered" NM wiring in
older homes. You know, same concept as Romex, except that all the sheathing
is cloth, not plastic. Well...

The original "romex" WAS the tar/paper/fabrick covered stuff.

Romex® is the specific brand name for a non-metallic (NM) building
wire made by Southwire.

"tar/paper/fabrick covered stuff" was branded under other names, as
is the plastic covered stuff sold today.

The Narragansett Wire Company did not make "Romex".