It is used for outdoor wiring serving air conditioning units and other outdoor equipment. Its close cousin, liquid-tight flexible metal conduit, is a flexible metal conduit covered with plastic sheathing to make it watertight. FMT tubing is commonly used for short runs in exposed locations, such as wiring for garbage disposers and water heaters.

Flexible Metal Conduit (FMT) and Liquid-tight Flexible Metal Conduit (LFMC): Flexible metal conduit has a spiral construction which allows the conduit to bend easily, simplifying installation in walls or other structures.

Outdoors, EMT will typically last a few years-indoors, it'll last indefinitely. EMT is best used indoors for residential and light commercial construction-if it's installed outdoors, it needs to be assembled along with watertight fittings. EMT is technically tubing, not conduit, hence the abbreviation uses the letter 'T' instead of 'C.' Because the tubing is thin and lightweight, it is easy to bend with a special tool called a conduit bender.

Electrical Metallic Conduit (EMT): Electrical metallic conduit is a rigid, thin-walled metal conduit typically made of galvanized steel.

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Flex type box connection