- The type UL liquidtight flexible steel conduit shall be formed from a zinc coated galvanized low carbon steel strip having a uniform Width and thickness. The construction shall be in accordance with UL 360 and CSA C22.2 no. 56 requirements. The finished type LFMC dimensions shall be in accordance with UL 360 and CSA C22.2 no. 56. A rugged moisture, oil and sunlight-resistant polyvinyl chloride (PVC) jacket shall be applied directly over the flexible metal conduit with a wall thickness in accordance with UL 360 and CSA C22.2 no. 56 which are summarized.