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Statistics for rigid conduit Look-up Popularity. Style: MLA. Get Word of the Day daily email! EMT conduit vs. American Conduit carries a nearly limitless supply of both, and we have team of experts who know the differences between the two. We can recommend exactly which kind of conduit is best for your specific application. EMT, or electrical metallic tubing, is made with thin walls.
As a result, it can be used in a wide range of environments — both industrial and commercial. EMT typically comes in two varieties, aluminum and steel. EMT is best suited for indoor use. It can, however, be used outside in certain instances, as long as all of the fittings, fasteners and supports are made of non-corrosive materials. All conduit is installed with compatible fittings couplings, elbows, connectors and electrical boxes, usually made of the same or similar material.
There are seven different types of conduit used commonly in residential and light commercial wiring. Rigid metal conduit, or RMC, is heavy-duty galvanized steel tubing that is installed with threaded fittings. It is typically used outdoors to provide protection from damage and can also provide structural support for electrical cables, panels, and other equipment. RMC is sold in and foot lengths and has threads on both ends.
Intermediate metal conduit, or IMC, is a thinner, lighter-weight version of rigid metal conduit and is approved for use in all of the same applications as RMC. Another example of a rigid electrical conduit is EMT electrical metal tubing , which is most commonly made of galvanized steel but can also be aluminum.
EMT is also called "thin-wall" conduit because it is thin and lightweight, especially compared to RMC. EMT is rigid but can be bent with a simple tool called a conduit bender.
EMT is installed with couplings and fittings that are secured with setscrew or compression-type fasteners. It is commonly used for exposed indoor wiring runs in residential and light commercial construction. If installed outdoors in exposed locations, it must be assembled with special watertight fittings. Electrical nonmetallic tubing ENT is flexible corrugated plastic tubing that is moisture-resistant and flame-retardant. It is easy to bend and installs with snap-lock or glued plastic fittings.
Unlike EMT, non-metallic tubing cannot installed in exposed locations, so it is commonly used inside walls. In addition to installation in standard wood- or metal-frame walls, ENT can be installed inside concrete block structures and can be covered with concrete. Due to the blue color of one common brand of this conduit, ENT is nicknamed "smurf tube ," after the Smurfs cartoon characters. Flexible metal conduit FMC is also called "Greenfield," after the name of its inventor.
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