What Is Nm Cable - Web you may know it as romex—which is just a brand name—or house wire, but nonmetallic sheathed cable (nm) has become a mainstay of residential wiring since it became available almost a century ago. This designation has to do with the number of insulated wire conductors the cable contains, even though it is a bit misleading. Nm is a quick, easy way to get power where you want it, and it’s relatively cheap compared to other methods of wiring. The “nonmetallic” designation refers to the protective sheath that covers the electrical conductors (wires). Web romex is the brand name of a nonmetallic (nm) sheathed electrical cable manufactured by southwire.
Web romex is the brand name of a nonmetallic (nm) sheathed electrical cable manufactured by southwire. This designation has to do with the number of insulated wire conductors the cable contains, even though it is a bit misleading. Web you may know it as romex—which is just a brand name—or house wire, but nonmetallic sheathed cable (nm) has become a mainstay of residential wiring since it became available almost a century ago. The “nonmetallic” designation refers to the protective sheath that covers the electrical conductors (wires). Nm is a quick, easy way to get power where you want it, and it’s relatively cheap compared to other methods of wiring.