Author: STI Conduit Committee Members


UL® Conduit Coupling Marking Requirements

Not sure whether the rigid steel conduit coupling you are using has been manufactured and listed to UL safety standards? UL has released a bulletin clarifying the marking requirements for straight threaded conduit couplings shipped individually and in bulk. The clarification did not affect the requirements for couplings assembled on finished lengths of conduit supplied[…]

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2017 NEC Changes

Many factors go into determining the type of wiring method for your project — factors such as ease of use, cost and flexibility — but perhaps the most important consideration is which methods are allowed by the electrical code. The National Electrical Code® (NEC®), or NFPA 70, is a regionally adoptable standard for the installation[…]

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Recent Recall of MC Cable Underscores the Value of Steel Conduit

On August 30, 2016, United Copper recalled its metal clad (MC) cable due to fire and shock hazards. The U.S. Consumer Product Safety Commission notes that “a damaged conductor coating can cause the cable to short circuit, posing fire and shock hazards.” In other words, the hazardous cable component isn’t United Copper’s aluminum armor, but[…]

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The Strength and Versatility of EMT

Choosing the right wiring method for the job is critical, which makes electrical metallic tubing (EMT) an excellent choice for contractors. Covered by Article 358 of the National Electrical Code® (NEC®), EMT provides physical protection and corrosion resistance, allowing it to be used in exposed, concealed or wet locations. It can also be used as[…]

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Steel Electrical Conduit Is Not Tested or Listed for Non-Electrical Applications

Because steel electrical conduit is readily available at local home improvement stores, it is tempting to use it for non-electrical projects, such as mechanical or structural applications. However, it is important to note that steel electrical conduit products are not evaluated or factory-tested for non-electrical applications. Furthermore, if structural steel is required for your project,[…]

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Simple Guidelines for Painting Steel EMT or Conduit

Want to paint your steel EMT or conduit, but don’t know whether painting complies with the National Electrical Code® (NEC®)? We are often asked this question. The NEC does not prohibit the painting of steel EMT or conduit, but it is important to maintain grounding continuity. The painting should be done after installation to maintain[…]

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Prepare for Tomorrow by Choosing Steel Conduit Today

While steel conduit may cost more upfront than other electrical system material options, its benefits pay off in the long run. Steel conduit provides the strongest circuit protection and allows for change — ensuring that your facility is prepared for whatever the future might hold. Specifically, steel conduit easily accommodates rework during construction and makes[…]

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The Inside Story of Steel Conduit and Tubing

Requirements for coatings on steel rigid metal conduit (RMC), intermediate metal conduit (IMC) and electrical metallic tubing (EMT) are included in the UL product standards as well as in the ANSI C80 standards for conduit and EMT. The National Electrical Code requires that these products be listed (see NEC sections 344.6, 342.6 and 358.6, respectively).[…]

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