For those who are not familiar with the difference between the two, BX has a mechanical ground as part of the armored cable wall or jacket, where MC has an “extra” green wire that is used for grounding purposes. Those are the only differences between the two cables.
What does BX in the electrical industry mean?
What Are BX Cable and Wire? Going under alternative names such as metallic sheathed cable, type AC, MC, Greenfield, or armored cable, BX cable is a collection of plastic-coated insulated wires (typically 14- or 12-gauge), bundled together and protected by a ribbon-like metal sheathing.
Why is it called BX cable?
Armored cable (AC) first appears in the 1903 NEC. There were originally two initial versions of armored cable. One was called “AX” and the other “BX,” with the “X” standing for “experimental.” The “BX” version became the one that eventually was produced, and hence the name “BX” became the common name.
Why is it called BX?
Can you mix Romex and BX?
The cable and connector is the ground with BX. As a side note to Speedy, Here in my area you cannot run romex directly to the furnace you must use bx at the furnace. So you can run bx all the way to the main panel with a switch in between or like I do, romex to a box and then bx to the furance as you have.
What does BX mean?
| Acronym | Definition |
|---|---|
| BX | Box |
| BX | Base Exchange (AAFES; US Air Force base retail store) |
| BX | Bronx (New York) |
| BX | Bronx (New York county) |
What do you need to know about BX cable?
Most BX connectors have a small hole or slot through which you must show the tab, tip or tail of the bushing, so the inspector knows it is in there. Strip the exposed wires and pull through the knockout hole of the electrical box, along with the open end of the connector.
How did the BX AC cable get its name?
The “BX” version became the one that eventually was produced, and hence the name “BX” became the common name.BX became the registered trade name of AC Cable distributed by General Electric who had acquired Sprague Electric. So “BX” is defined as “AC” cable (armored clad) and “MC” is defined as Metal Clad cable.
When was BX wiring first used in homes?
BX wiring (also known as armored cable) is the 2nd generation of wiring used in homes. It first appeared in the 1903 National Electrical Code (NEC) book. It became popular in the 1920s, and it was the main wiring type by 1932. BX wiring was used until the late 1940s, when it was replaced by early Romex (non-metallic sheathed cable).
When was BX wiring replaced by Romex cable?
BX wiring was used until the late 1940s, when it was replaced by early Romex (non-metallic sheathed cable). It relies on the outer coverings to maintain a ground path. Each time a BX wiring circuit went in and out of a box, it used a special connector with a lock nut. This nut and connector had to be tight.
