Hello Dear Community, I have a question with regards to the following interpretation of a Code in NFPA 13 - 2013 Edition: 18.104.22.168.2 Retroactive Installation. When backflow prevention devices are to be retroactively installed on existing systems, a thorough hydraulic analysis, including revised hydraulic calculations, new fire flow data, and… Show more
I have a storage arrangement that has been difficult to classify. Many of my colleagues have drawn different conclusions for a variety of reasons. The storage arrangement in question is raw potatoes in plastic totes (an empty tote weighs 200 lbs and when full of potatoes weighs 2,000 lbs - 10% plastic by weight and less than 5% by volume when… Show more
I have a project in an Artic environment where the Owner has a large pond they would like to use for their fire water source. Question regarding fire water reliability evaluation per NFPA 11, A22.214.171.124, recycled water, process water or grey water can be utilized in foam production providing the water quality is suitable. In addition, NFPA 24,… Show more
Fire Collars At what size pipe would a fire collar be required? I cannot find a code reference in LSC chapter 8 or IFC. I did find some commentary from the ICC but it only stated that anything greater than 3 inches, check the system.
As was the case in The Station nightclub fire 10 years ago in Rhode Island, combustible insulating foam appears to have been a major factor in how the Kiss nightclub fire in Brazil began and spread, says Chip Carson in his column "Finish Issues" in the most recent issue of NFPA Journal. Because textiles placed on walls and ceilings can burn very… Show more
For an existing conference room where the Architect required adding an outlet, the plan check person has required outlets as per this article, which requires quantity as in a residence. In addition, it requires floor receptacles for each 215 square feet of room. For one room, it is smaller and has doors each wall, as code does not restrict,… Show more
Alex is correct. They fixed this in the 2020 to clarify the code panel's intent: 210.65(B)(2) Floor Outlets. A meeting room with any floor dimension that is 3.7 m (12 ft) or greater in any direction and that has a floor area of at least 20 m2 (215 ft2) shall have at least one floor receptacle outlet, or at least one floor outlet to serve…
Does NEC 680.7 apply to factory and field installed lugs, the way I read it is the first sentence would apply to factory lugs and the second sentence would apply to field installed lugs.
You would have to ask code panel 17 and they may not have an immediate answer for you. But your interpretation wouldn't necessarily be incorrect - equipment that comes with lugs from the factory would be "listed for use." It is just if you install something in the field, then it has to be listed for direct-burial use. Here is how they…
Each year as summer turns to fall, we see an uptick in home fires from increased heating device use, cooking, and other everyday activities. We know more about how to protect ourselves from fire than ever, but there are still situations that highlight opportunities to do more. Last week, Jefferson County suffered a tragic loss, when a mother and… Show more