EMT stands for electric metallic tubing, which is a type of electrical conduit used in cable installations. EMT conduit is made of galvanized steel and is commonly referred to as a thin-wall conduit because its walls are significantly thinner compared to other types of conduit, such as rigid wall conduit (RMC) . EMT conduit is lightweight, flexible, and easy to bend, making it a versatile type of conduit suitable for exposed and concealed applications, indoors and outdoors, in both wet and dry conditions, and for direct burial. EMT conduit is also permitted to be embedded in concrete and used as an equipment grounding conductor as per NEMA 250.118.

EMT conduit is commonly used in commercial, industrial, and residential applications where not much physical damage is expected, and it can be used in overhead lighting circuits and retrofitting and remodeling projects for rerouting of cabling because of its flexibility. EMT conduit is not suitable for use where physical damage is a strong possibility, and raintight EMT fittings are not currently available on the market.

EMT conduit is available in different sizes, with the minimum and maximum trade sizes allowed to be used as EMT being no smaller than 1/2" and no larger than 4". When cutting EMT, it is important to ream or clean the inside of any newly cut conduit before installing it to prevent damage to the conductors.

In summary, EMT conduit is a type of electrical conduit made of galvanized steel that is lightweight, flexible, and easy to bend. It is commonly used in a variety of applications, both indoors and outdoors, and is suitable for direct burial and embedding in concrete. However, it is not suitable for use where physical damage is a strong possibility.