Connectors of the set-screw type are only permitted to be used with cables having steel armor. They are not acceptable on cables with aluminum armor.
Moreover, can armored cable be exposed?
This casing needs to be attached to metal boxes. Another distinction is that some types of BX cable can be installed in exposed locations, either indoors or outdoors. NM cable and wiring must always be installed in an enclosed location (typically within a wall, ceiling, or under a floor).
Likewise, can MC cable be used in residential? Type MC Cable without an outside nonmetallic jacket can be installed in an “other space used for environmental air” in accordance with Section 300.22(C). These cables can be installed either indoors or outdoors and in exposed and concealed locations. They can be installed in a cable tray or in any raceway.
Secondly, how often should AC cable be supported?
According to NEC® Article 320.30, AC cable must be supported and secured at intervals of 41⁄2 feet or less (unless routed through a framing member) and within 12 inches of every termination.
Does armored cable need to be grounded?
If the fiber-optic cable in a system needs extra protection, there is an alternative to using conduit or a bonded and grounded conductive cable, such as an all-dielectric armored cable. Because all-dielectric armored cable has no metallic components, there is no need to ground or bond the cable.
17 Related Question Answers Found
Can you run MC cable in conduit?
The individual conductors, in MC, are not approved for use in other raceways without being in the MC jacket. The fact it is allowed in any raceway means it is allowed in any raceway. When it is in a raceway it does not have to be secured to the box, it is secured to the raceway.
Can you use MC cable in a damp location?
PVC coated, sunlight resistant, direct burial rated MC cable can be used in a wet location.
What is the difference between MC and BX cable?
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.
Can you run MC through EMT?
Type MC is permitted for services, feeders and branch circuits, indoors or outdoors, exposed or concealed. It may be used in some, but not all classified locations. It is permitted in wet locations and underground where identified for such use. A conduit bender is the only specialized tool needed for working with EMT.
Is MC cable weatherproof?
MC can be used outdoors, wet (if conductors so rated), and direct buried (if cable so rated).
What is the difference between armored cable and MC cable?
Armored cable (AC) first appears in the 1903 NEC. There were originally two initial versions of armored 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.
What must be done when cables are bundled together for more than 24 inches?
The rule applies only to bundles exceeding 24 inches in length, the assumption being that conductors beyond the 24 inches would act as heat sinks to conduct and dissipate the heat from the inner conductors.
What does CLX cable stand for?
NAMES. C-L-X® Continuous-Lightweight-Exterior. Welded and corrugated, impervious metallic sheathed cables.
How many bends are allowed in a run of armored cable?
The NEC officially limits you to no more than 360 degrees worth of bends, NEC 346-11. I.e. 4 qty standard 90 degree turns. There is no official limit of length, or limit on configuration of lengths among the bends. It is up to your pulling tension calculations to determine if a pull is possible.
How often do you have to strap MC?
It must be secured at least every 6 ft. Additionally, MC cable containing four or fewer conductors of size 10 AWG or less is required to be secured within 12 in. from every box, cabinet, or fitting.
How many MC wires go through a metal stud?
We have 2 (2) 3/4 flex and (1) 12/4 MC running through the same factory punched 1 1/2″ X 3″ hole in metal studs.
What is MX cable?
Type MC Steel Metal Clad Cable is a traditional Type MC cable containing one or more copper grounding conductors; the armor is not an equipment grounding means. Made in USA of US and/or imported materials.
Can you use zip ties to strap MC cable?
You are correct that cable ties are permitted to support and secure MC cable as stated in 330.30. In general raceways and cables are not allowed to support other raceways, cables or nonelectric equipment as stated in 300.11 (B) & (C).
Can you use MC cable with plastic boxes?
Plastic boxes do not have the proper clamps to secure MC cable. Its against code to run MC cable into a plastic box. Plastic boxes do not have the proper clamps to secure MC cable.
What is a BX connector?
BX Connectors. 3/8″ Flexible Metal Conduit (FMC) connectors are designed to for a variety of cables including BX, AC, AC90 and Metal Clad (MC) when connecting to steel enclosures or junction boxes in dry lcoations.
How do you feed wire through a flexible conduit?
Tie a string to a long, thin nonflexible rod. Push the rod and string through the conduit until the string emerges from the opposite end. Tie electrical wires onto the string. Pull the rod back through the conduit, bringing along the wires.
Can you use flex conduit outside?
Nonmetallic conduit is typically made from PVC and is a good choice for outdoor residential applications. Some code-compliant PVC fittings can be used with ENT inside walls, floors, some ceilings or encased in concrete. Outdoor flexible nonmetallic tubing is strong and watertight, non-corrosive and weighs less.