STI offers new technical bulletin

The Steel Tube Institute of North America’s Conduit Committee has published the first two of what will be a series of bulletins containing technical information about steel conduit and electrical metallic tubing (EMT). The bulletins, entitled TechTalk, are being produced to address the needs of electrical engineers, specifiers, building owners, contractors, installers, and users for specific technical data.

The first bulletin in the series covers the Underwriters Laboratories (UL) and National Electrical Code (NEC) Requirements for Corrosion Protection of Steel Conduit and Electrical Metallic Tubing. The eight-page bulletin discusses the importance of considering corrosion protection when evaluating the life expectancy of wiring methods.

The subjects covered in the bulletin include:
• UL standards for testing and establishing performance requirements for protective coatings
• UL White Book guidance for corrosive environments such as concrete and soil
• NEC requirements
• The use of supplemental corrosion protection, such as paints, tape and shrink wraps and PVC-coated conduit.

The second bulletin in the series discusses the unique ability of steel conduit and EMT to act as equipment grounding conductors. It covers the NEC requirements for equipment grounding, cites other reference materials and summarizes the key findings of Dr. Sakis Meliopoulos, professor of Electrical and Computer Engineering at Georgia Tech, and one of the top experts in the field of grounding, concerning the use of steel conduit and EMT as equipment grounding conductors.

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