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Kudos to Tab Tryon with Dynamic Sales in Florida for helping identify a huge sales opportunity for FST Duct Sealant. Tab attends electrical continuing education classes and presents FST information such as our NEC Duct Sealing Codes Sheet to inspectors and electrical contractors. This resulted in a helpful message from an attendee regarding our NEC references: "Your marketing department forgot NEC 300.7 (A), which references the requirement to seal between different atmospheres, i.e., conduit passing through 1) air-conditioned room to roof, 2) room temp to cooler or freezer (every restaurant or fast-food location in the world), 3) 1st floor to basement, 4) outside to inside, 5) outside to basement, etc. If you do not seal between different atmospheres, the electrical conduit can weep into energized equipment–-very common in conduit running underneath hot asphalt/concrete pavement and into a cool basement. Going from air conditioning to an attic can easily be a difference of 40~80 degrees. Surprisingly, the water can add up to be quite substantial, from cups to gallons. Every electrical high voltage & low voltage conduit that goes from rooftop air conditioning unit (RTU) into a retail unit has the outside of the conduit sealed in a pitch pan, but the interior of the conduit will sweat inside the tenant space if not sealed as required by Code." The specific code language refered to is: "300.7 Raceways Exposed to Different Temperatures. (A) Sealing. 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 explosionproof seal shall not be required for this purpose." Let's work immediately with FST Foam Duct Sealant to end condensation in electrical systems globally. |
