What is the outside diameter of 1 inch EMT conduit? 1″ Electrical Metallic Tubing (EMT or Thinwall) is a smooth lightweight galvanized metal conduit that has an inside diameter of 1.049″ or 26.64mm. The outside diameter is 1.163″ or 29.54mm. The wall thickness of 1″ EMT is 0.057″ or 1.45mm. ...
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