| 摘要 |
A labor saving system, method, and apparatus for connecting or coupling lengths of electric metallic tubing ("EMT"). The invention uses couplingslconnectors that have barbs that are designed to engage corresponding indentations on EMT to ensure proper installation. fn one aspect, the invention is an EMT having: an EMT inner surface forming an EMT cavity; an EMT outer surface; an EMT first end; and at least one indentation in the E MT outer surface at or near the EMT first end, the indentation adapted to recei ve a corresponding barb from a sleeve device. In another aspect, the invention is a sleeve device comprising; a sleeve inner surface forming a sleeve cavity adapted to receive an end of an EMT; a sleeve outer surface; a first sleeve end; at least one barb on the sleeve inner surface at or near the first sleeve end, the ba rb adapted to engage a corresponding indentation on the EMT.
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