Asked by: Adair Barnils
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What is flexible metal conduit called?

Last Updated: 24th March, 2020

Flexible metallic conduit (FMC, informally called greenfield or flex) is made by the helical coiling of a self-interlocked ribbed strip of aluminum or steel, forming a hollow tube through which wires can be pulled. FMT is a raceway, but not a conduit and is described in a separate NEC Article 360.

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Besides, what is flexible metallic conduit?

Flexible metal conduit (FMC) has a spiral construction that enables it to snake through walls and other structures. FMC protects electrical wiring in commercial and industrial buildings. Liquidtight flexible metal conduit (LFMC) is a special type of FMC that has a plastic coating.

Furthermore, is MC cable considered flexible metal conduit? Flexible metal conduit (FMC) is commonly called “Greenfield.” The main difference between MC cable and FMC is that FMC doesn't have the insulated wires pre installed; you have to pull them through instead. It also allows you to add wires in the future, something you can't do with MC cable.

In this way, where is flexible metal conduit used?

It is most often used in dry interior spaces, but can be used in damp locations with corrosion-resistant hardware and rain-tight fittings. Flexible Metal Conduit is easy to install and has a spiral construction for a high degree of flexibility.

What is the difference between EMT and rigid conduit?

Rigid is a thick wall conduit that is normally threaded. EMT is a thin wall conduit that is not thick enough to be threaded.

Related Question Answers

Janita Sid Ahmed


Does EMT conduit rust?

Typical EMT Type conduit will resist rust for a few years. It is however inevitable that it will rust. On the other hand there have been times when the conduit has rusted on parts of its surface having been exposed to the outdoor elements for one or two seasons.

Itsasne Porosenkov


How long can you run flexible conduit?

250-18 limits flexible metal conduit to 6 ft only for grounding. In lengths over 6 ft, you must install a separate grounding conductor.

Saveta Tiekenheinrich


What is flexible conduit used for?

Liquid tight flexible metal conduits or LFMCs are used to cover cables which need both flexibility and protection from moisture. This conduit has a waterproof jacket which means that it can be used in a variety of applications, including those that involve exposure to hazardous areas.

Maleni Bumbu


Is flexible conduit waterproof?

Liquid Tight Flexible Metal Conduit is also commonly known as LFMC and this is a flexible type of conduit which covers cables and remains flexible while still being waterproof. The waterproofing jacket means that the flexible metal conduit can be fitted pretty much anywhere, including through damp areas.

Blossom Abolihin


What is the flexible metal?

There actually are simple Nitinol is by far the most flexible metal* As the stress-strain curve below shows it can reach a strain of nearly 8% and still recover its original form. Few other alloys can exceed a strain of 1% (beta-C titanium, 7068 aluminum, extra-hard or hyten 304 stainless steel wire).

Celma Bullejos


How many wires can be in a flexible metal conduit?

Allowable Conduit Fill Capacities
Size and Type of Conduit 14 AWG Wire 8 AWG Wire
1/2-inch EMT 12 3
3/4-inch EMT 22 6
1-inch EMT 35 9
1 1/2-inch EMT 84 22

Arkadiy Bildosola


How is conduit measured?

OD and Nominal Pipe Size
Tubing is measured by the OUTSIDE DIAMETER (O.D.), specified in inches (e.g., 1.250) or fraction of an inch (eg. 1-1/4″). Pipe is usually measured by NOMINAL PIPE SIZE (NPS). Although it is related to the outside diameter, it is significantly different.

Perlita Ayaou


Can flexible conduit be exposed?

According to 348.10 of the 2011 NEC, flexible metal conduit (FMC) is permitted in exposed or concealed locations. On the other hand, the locations where FMC is not permitted are much more specific.

Eunate Galino


Can flexible conduit be buried?

Not all types of conduit can be buried in the soil. EMT (Electrical Metallic Tubing) and flexible “Raintite” are not considered suitable for burial. Code specified that Schedule 40 PVC can be used underground, where the conduit passes through the house, or where it passes inside a lamppost.

Sandrina Bensaad


How do you cut flexible metal conduit?

Follow these steps to cut a flexible metal conduit properly for the safest installation.
  1. Step 1 - Measure Distance. Using a tape measure, measure the distance from point to point where the conduit will be routed.
  2. Step 2 - Place Conduit in Vice.
  3. Step 3 - Cut the Conduit.
  4. Step 4 - Smooth Out the Edge.
  5. Step 5 - Clean Up.

Wilver Jadot


What is flex conduit made of?

Extra flexible conduit is a non-UL extra flexible conduit made with high grade galvanized low carbon steel with an interlocking design and is also corrosion resistant.

Gizella Hole


What is metal conduit made of?

Rigid metal conduit (RMC) is a thick-walled threaded tubing, usually made of coated steel, stainless steel or aluminum. Galvanized rigid conduit (GRC) is galvanized steel tubing, with a tubing wall that is thick enough to allow it to be threaded. Its common applications are in commercial and industrial construction.

Bin Weyerhauser


Is PVC conduit flexible?

PVC conduit is also used for many electrical requirements. This product is flexible and durable and resists corrosion. PVC conduit provides protection for electrical work that is buried underground.

Nevenka Urzaiz


What is flexible nonmetallic conduit?

Non-metallic conduit is a versatile product that has a variety of applications for indoor and outdoor locations. Non-metallic conduit is used in fixture whips, data centers, electric signs and outdoor lighting, HVAC, pool and spas and locations with exposure to sunlight and weather conditions and more.

Tifa Warstat


Can I run electrical conduit above ground?

Buried wiring runs that transition from underground to above ground must be protected in conduit from the required cover depth or 18 inches (whichever is less) to its termination point above ground, or at least 8 feet above grade.

Amabel Elefante


Colton Arolas


Is Mc considered conduit?

Article 330 defines Type MC (metal clad) cable as “a factory assembly of one or more insulated circuit conductors with or without optical fiber members enclosed in an armor of interlocking metal tape, or a smooth or corrugated metallic sheath.” Article 354 covers Nonmetallic Underground Conduit with Conductors.

Yaniel Grabenhorst


Can you run MC cable in conduit?

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.

Guaxara Juy


What does BX cable mean?

Basic armored cable was developed in the early 1900s by Harry Greenfield and Gus Johnson, who called their product BX cable. It has become a generic term for all armored cable.