FAQ: How Long Is Emt Conduit?

When buying in retail, EMT conduits are typically available in sizes ½ through 4; and is available in 10′ to 20′ lengths.

What lengths does EMT conduit come in?

Most EMT is steel, galvanized on the outside and painted on the inside with an organic coating. It is also available in aluminum and some copper alloys, generally for use in special environments, and with the exterior coated with PVC. It is sold in nominal 10- and 20-foot lengths, usually ten.

Is EMT the same as conduit?

Electrical metallic tubing (EMT) is made from coated steel or aluminum and is a more economical and thinner-walled option than other conduit. This conduit type doesn’t offer the same protection as rigid metal conduit but is lighter and can be paired with conduit fittings, eliminating the need for threading.

Where is EMT conduit not allowed?

EMT shall not be used under the following conditions: Where subject to severe physical damage. For the support of luminaires or other equipment except conduit bodies no larger than the largest trade size of the tubing.

How is EMT conduit measured?

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). For example, a 1-1/2″ pipe size actually has an outside diameter of 1.9″ NOT 1.5″.

What is the minimum size EMT?

The minimum size permitted is metric designator 16 (trade size ½) unless used for enclosing motor leads [see Section 430.145(B)]. The maximum size permitted is metric designator 103 (trade size 4). Cannot exceed the percentage fill requirements of Table 1, Chapter 9.

Is conduit size OD or ID?

A conduit trade size of 1 inch has an actual inner diameter of 1.049 inches. 2-inch lengths typically have an inside diameter of 2.067 inches.

Can I use EMT conduit outside?

EMT conduit is more affordable than IMC or GRC, but its thin walls are more easily punctured. This rigid metal conduit is approved for all interior applications but can also be used outside.

What’s EMT conduit?

Allied Tube & Conduit^® has been manufacturing Electrical Metallic Tubing (EMT) for over 50 years. EMT conduit is a raceway solution which allows for future wiring changes and provides excellent mechanical protection to conductors and cables. EMT provides EMI shielding and is 100% recyclable.

How strong is EMT conduit?

EMT is reported as 2,155 lbs before it actually fails. MC in the same test failed at around 800 lbs. So the theoretical values are off by a factor of 4. That’s not surprising.

Can you put EMT in concrete?

Ferrous or nonferrous EMT, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where protected by corrosion protection and approved as suitable for the condition.

How often does EMT need to be strapped?

EMT must be secured at least every 10 ft. and within 3 ft. of every outlet box, junction box, device box, cabinet, conduit body, or other termination. An exception allows EMT to be fastened up to 5 ft.

Can EMT be threaded?

It may be threaded. Electrical metallic tubing (EMT), sometimes called thin-wall, is commonly used instead of galvanized rigid conduit (GRC), as it is less costly and lighter than GRC. EMT itself is not threaded, but can be used with threaded fittings that clamp to it.

What is conduit size?

Some typical US Customary trade sizes for conduit are ½, ¾, 1, and up to 4. Outside the US, conduit sizes are typically measured in millimeters and are based on the outer diameter. Some common metric outer diameter sizes are 20 mm, 25 mm, 32 mm, 40 mm and 50 mm.