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Important new sales tool for FST Foam Duct Sealant. This updated FST NEC Code Flyer details the specific code sections met. The new flyer is also available on RepFiles. Recall that FST meets and exceeds the NEC code requirements for sealing conduits. FST is far superior to duct putty and canned foam. It's cable compatible, airtight, chemically resistant, and re-enterable. It holds more water head pressure and won't sag or dry out ... all of which is worthless if a contractor or inspector feels it violates NEC code. A basic understanding of the duct sealing codes is critical to your FST sales. FST meets these codes: NEC 225.27 Raceway Seal: "Where a raceway enters a building or structure from an underground distribution system, it shall be sealed in accordance with 300.5(G). Spare or unused raceways shall also be sealed. Sealants shall be identified for use with the cable insulation, shield, or other components." Article 230.8 states that, "Where a service raceway enters a building or structure from an underground distribution system, it shall be sealed in accordance with 300.5(G). Spare or unused raceways shall also be sealed. Sealants shall be identified for use with the cable insulation, shield, or other components.” Article 300.5(G) states that, "Conduits or raceways through which moisture may contact energized live parts shall be sealed or plugged at either or both ends. Presence of hazardous gases or vapors may also necessitate sealing of underground conduits or raceways entering buildings." Article 300.7(A) states that, "Where portions of a cable, raceway, or sleeve are known to be subjected to different temperatures and where condensation is known to be a problem as in cold storage areas of buildings or where passing from the interior to the exterior of a building, the raceway or sleeve shall be filled with an approved material to prevent the circulation of warm air to a colder section of the raceway or sleeve. An explosion proof seal shall not be required for this purpose." NEC 501.15 (B)(2) Conduit Seals, Class 1 Division 2: "A conduit seal shall be required in each conduit run leaving a Class 1, Division 2 location ... and it shall be designed and installed to minimize the amount of gas or vapor within the portion of the conduit installed in the Division 2 location ... Such seals shall not be required to be explosion proof ..." Failure to comply with 230.8 is one of the top 20 most common installation deficiencies, so there's lots of room for growth. The question is, what's an approved material? Generally, the code leaves approval up to the AHJ ("Authority Having Jurisdiction"). Duct putty is commonly used, but it's ineffective. That's where FST shines. It's excellent at blocking water and gases, easily outlasting and out-performing duct putty. It's compatible with cables and conduits, and is UL recognized. Let's go. |
