Romex® Brand NM Wire
Peter Walsh, PE
Romex® is a brand name of wire, instead of generic wire. It was invented
and registered as a brand name with the Federal government in 1922 as
Non-Metallic Building Wire (NM) by the former Rome Wire Company. The
ownership of the brand name was purchased by Southwire Company in 2001.
If the wire box says Romex, now it should have Southwire inside.