intermediate metal conduit

Also found in: Acronyms.

electrical metallic conduit (EMC)

Conduit, usually fabricated of steel, which encloses electrical wiring, thereby protecting the wiring from outside damage. The difference between electrical metallic conduit and electrical metallic tubing (EMT) is that conduit is heavy-walled and usually has threaded ends; in contrast, tubing is thinner and is not threaded. Between these two is an intermediate metallic conduit (IMC), which is 25 percent lighter and less costly than EMT; it may be threaded or threadless.
References in periodicals archive ?
Heavy duty lines provide thick material for added security whereas open-ended parts are used particularly for protecting external threads, rigid and intermediate metal conduit ends.
and international standards, announces the release of NEMA's revised Polyvinyl-Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit, RN 1-1998, standard.
It also describes plastic coatings applied to galvanized rigid steel conduit and galvanized steel intermediate metal conduit.
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