What is MC cable?

MC Cable, by most common definition, is a factory assembly of one or more insulated circuit conductors enclosed in an armor of interlocking metal tape or a smooth or corrugated metal sheath.

What is the difference between MC and AC cable?

The biggest difference between the two cable systems is that MC has full size ground wire while AC uses a combination of the jacket and a thin bonding strip or wire to function as the equipment ground. This type of MC Cable will have a continuous PVC outer jacket.

Where is MC cable required?

Type MC cable installed on the bottom of floor or ceiling joists must be secured at every joist and not be subject to physical damage [Sec.

The first thing you need to know about these terms is that BX cable and MC cable are both referring to armored cable. Both are essentially just names for armored cable. When fiber is armored, it has a conductive jacket because the material is made from metal, usually aluminum or steel.

Can MC cable get wet?

PVC coated, sunlight resistant, direct burial rated MC cable can be used in a wet location. General use MC cables cannot be used in wet locations but there are some types of specialty MC cables that can. The most common is the PVC coated, sunlight resistant, direct burial listed MC cable in the image.

Can I install Type MC in concrete or against concrete or mortar? A. Yes, if the cable is listed for the application. Type MC cable is available with an outer PVC jacket and is permitted to be installed in parking decks, concrete pours and for direct earth burial if it is identified for such use.

Can you use MC cable in a house?

The interlocking metal tape armor Type MC cable is required to have a bare or insulated equipment grounding conductor in addition to any other conductors within the cable. These cables can be installed either indoors or outdoors and in exposed and concealed locations.

Are Anti short bushings required?

According to NEC® Article 320.40, an insulated (anti-short) bushing is required when installing Type AC cable. It is installed at the time of termination and designed to protect the conductors from damage. AFC provides bushings in bags packaged with the cable.

Although the Hazardous Locations section of NEC Chapter 5 requires threaded rigid conduit (RMC) or threaded steel intermediate conduit (IMC) for the real hardcore hazardous (classified) locations, MC cable is allowed in some installations with some listing restrictions.

Can Romex be used in attic?

Yes. NM cable may be exposed in attic. This is very common in modern dwellings. Armored cable / MC is not necessary in your case.

Can MC cable be painted?

The quick answer is “yes,” but let’s cover some of what you’ll need to know first. Painting the armor does not violate the National Electric Code (NEC), however, this process can be time consuming and also create more cleanup on the job-site utilizing pre-painted armor saves time and labor.

What is Romex wire?

Romex is the trade name for a type of electrical conductor with non-metallic sheathing that is commonly used as residential branch wiring. Romex™ is a common type of residential wiring that is categorized by the National Electrical Code (NEC) as underground feeder (UF) or non-metallic sheathed cable (NM and NMC).

How often do you strap Romex? General Cable Support Runs of NM cable must be supported at least every 54 inches. They also must be secured within 12 inches of an electrical box that includes a cable clamp or within eight inches of a box or enclosure without a cable clamp.

What type of wire is in MC cable?

MC cable contains conductors from 18 AWG through 2000 kcmil for copper and 12 AWG through 2000 kcmil for aluminum. Typical branch circuit Type MC cables have copper conductors with THHN, THHN/THWN or XHHW insulation and are suitable for circuits up to 600 volts.

Can you strap MC with zip ties?

Are cable ties (or “Ty-Raps”) allowed for supporting Type MC cable in a ceiling? Yes, cable ties are permitted. Section 330.30(A) provides the general requirements and permits cable ties.