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iryna.seleznova
iryna.seleznova in Fire Protection Systems4 months ago (Show more)
We create a design of a deluge foam system for the oil extraction plant. NFPA 16 show density  6,5 mm/min. We used instead nozzle open sprinkler k 115. According to NFPA 13 “27.2.4.11.1 Minimum operating pressure of any sprinkler shall be 7 psi (0.5 bar)” But if we use 0.5 bar we get density 9 mm/min and increase the volume of foam. System… (Show more)
in Fire Protection Systems
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fn1000
fn1000 mentioned Fire Protection Systems 3 months ago Show mention context
Use of Grooved Fittings and Mechanical Tee
ashikpn
ashikpn in Fire Protection Systems8 months ago (Show more)
Dear all ,    Sub : Foam sprinkler system Design:    one of my ongoing project , Foam water sprinkler system is required to protect the generator area of 675 square meter . as per NFPA 16 ,Design area shall be 465 square meter. if protection area of the generator is more than 465 square meter , shall i consider 2 system separately for generator… (Show more)
in Fire Protection Systems
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chiefns830
chiefns830 in Electrical4 months ago (Show more)
Don't assume that even the most "simple" electrical jobs aren't dangerous:   http://archive.tcpalm.com/news/sebastian-handyman-charged-with-not-having-a-license-after-employee-dies-ep-396486835-347245332.html/
in Electrical
chiefns830
chiefns830 in Electrical4 months ago (Show more)
test
in Electrical
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kraiseeh
kraiseeh in Building & Life Safety2 years ago (Show more)
Dear Milton,   I am really existing to receive your answer. I am new to this forum and to be very honest , I am new to fire protection engineering too. I am an elevator design engineer and interesting to study fire protection engineering.   This building is in Thailand. Thailand's code required pressurized lobby for fireman elevator. I am… (Show more)
in Building & Life Safety
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cmholst
cmholst in Code Enforcement4 months ago (Show more)
This question is coming from a concern that I have over sprinkler riser systems device installation/replacing such as pressure, tamper, water flow, switches and related low voltage devices on any working riser system and the requirement for any technician to be able to perform, and a State licensed Limited Energy technician performing this work.… (Show more)
in Code Enforcement
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scberd
scberd in Electrical4 months ago (Show more)
I live off the grid and in need of new battery's for my solar system. After a long study I believe a Lifepo4 system would be the best alternative for my needs. Lifepo4 has a safety factor that is so much better than any other system, but I have been told it is not allowed in a house. What are the restriction for LIfepo4 battery's.
in Electrical
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houseguy
houseguy in Fire Protection Systems4 months ago (Show more)
Hello, NFPA community! Here are the facts of my situation: I'm a homeowner in central Ohio finishing out my own 1600 sq ft basement (legally permitted, of course) in a single-story, single-family dwelling (built '95). I'm installing two bedrooms which happen to be located under a concrete porch, thus I'm unable to (affordably) install egress… (Show more)
in Fire Protection Systems
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apurvadave
apurvadave in Electrical4 months ago (Show more)
Click to view contentI have monopole cell tower. The tower has DC conductor cables that run from equipment on ground to cell tower antennas, RRUs, etc up top. Kind of like this: or like this in web link below:   https://wirelessestimator.com/wifi/images/uploads/Guying%20Monopole.jpg Does anyone here know do those DC conductor cables that run up to tower to… (Show more)
in Electrical
architectkwon
architectkwon in Building & Life Safety4 months ago (Show more)
Under Construction Type, what do the numbers in parentheses mean?  I cannot find reference to its explanation.  For example, III(211) vs III(200).   Thanks much!
in Building & Life Safety
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cclabbers
cclabbers in Electrical4 months ago (Show more)
I have had a 300hp motor shipped to me with the motor opening being to small for the amout of leads that are coming out. So small infact that the motor leads insulation was being cut by the conduit adapter on the motor outlet cover. This adapter is a 2.5 inch adapter welded to the motor cover. There are 12) 1/0 motor leads and 1) 4/0 ground. If… (Show more)
in Electrical
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ashikpn
ashikpn in Fire Protection Systems2 years ago (Show more)
Is there any specific reason not to use abort switches on carbon dioxide system as per NFPA-12 4.5.4.11 "Abort switches shall not be used on carbon dioxide systems."
in Fire Protection Systems
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