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richard.harvey in Fire Protection Systems23 hours ago (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, A4.2.1.1, 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)

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milt.werner (to richard.harvey) Less than a minute ago (Show more Show less)

Taken from NFPA 1142, NFPA 1142, Standard on Water Supplies for Suburban and Rural Fire Fighting: The standard intends that good sense and judgement be applied to the design of the water supply system to comply with the available NFPA performance standards. It is the professional designers' job, not the AHJ's. If I were to review the design…

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j_w_hines in Electrical6 days ago (Show more)

NEC 210.71

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)

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j_w_hines (to j_w_hines) 2 minutes ago (Show more Show less)

For the 2020 code, they fixed the multiple floor outlet count, but if the Architect makes the room 12' wide and the outlet must be not less than 6' from any fixed wall, interesting math. Does this mean we need to advise Architects the minimum width is 12' 3" so we can get 6' + outlet + 6'? 210.52.A.4 mentions countertops, is there something that…

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ccoache

in NFPA Today2 hours ago (Show more)

A Better Understanding of NFPA 70E: Why NFPA 70E, Standard for Electrical Safety in the Workplace Does Not Include Incident Energy Calculations.

I often get questions on which standard, equation or computer program should be used to calculate the incident energy when the incident energy analysis method is used. Some argue that the information should be in NFPA 70E, Standard for Electrical Safety in the Workplace or they use the Annex D equations without understanding their applicability.… (Show more)

chong in Fire Protection Systems21 hours ago (Show more)

Underground Piping and Sprinkler Piping

I would like to check with regards to the underground, above ground and sprinkler piping to be used. Is there a requirements to use Galvanized piping for fire ring main hydrant system as per NFPA guide lines? Are cement lined pipes recommended as water authorities generally require ductile iron for underground pipes? As for Galvanized Iron (GI)… (Show more)

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nocivus (to chong) 4 hours ago (Show more Show less)

1. Steel pipes cannot be used underground. The only exception are ASTM A312 stainless steel pipes. 2. Pretty much all commercially available ductile iron pipes are cement lined. 3. Even with wrapping steel pipes are not permitted underground. 4. No. 5. NFPA 13 section 6.4.2.1 has requirements for protection against freezing.

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abircuet2010 in Fire Protection Systems1 week ago (Show more)

Automatic detector Requirment

Hi guys, Consider a shed having only roof is using for dining. All sides are open to enter and exit. Is it mandatory to have both automatic detector and Manual Call point or only manual call point is enough???

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jamila in Fire Protection Systems1 day ago (Show more)

NFPA 13 (2013) 8.17.4.6.2 Interpretation

Hello Dear Community, I have a question with regards to the following interpretation of a Code in NFPA 13 - 2013 Edition: 8.17.4.6.2 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)

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jamila marked milt.werner's answer correct

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pseabolt in Building & Life Safety22 hours ago (Show more)

Fire Collars

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.

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milt.werner (to pseabolt) 19 hours ago (Show more Show less)

The requirements like in Section 8.3.4.2 Firestop Systems and Devices Required of the 2018 NFPA 101 are performance specification as most of the code is not prescriptive. The code does not preclude the use of 'fire collars' for specific sizes of pipe. In accordance with Section 8.3.4.2.1, penetration for pipes of any size that pass through a…

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ian.power in Fire Protection Systems23 hours ago (Show more)

Commodity Classification (Class IV vs. Group A) NFPA 13

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)

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rpelley (to ian.power) 22 hours ago (Show more Show less)

You may want to refer to FM Data Sheet - 8-1 Commodity Classification, Specifically paragraphs 2.3.5, 2.3.7, 2.3.8, 3.8.3 & Figure 3. Comments from that DS - The external packaging of the a material will determine the early stages of fire growth. If the external packaging is higher or lower hazard than the material inside the package, the…

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mdemps3 in Electrical23 hours ago (Show more)

2017 NEC 680.7

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.

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chiefns830 (to mdemps3) 23 hours ago (Show more Show less)

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…

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cthompson

in FSI1 day ago (Show more)

Jefferson County Fire Illustrates What’s at Stake with Home Fire Prevention

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)

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pwk@kraemerkoating.com in Electrical4 days ago (Show more)

480 VAC VFD Power - Do I need an Enclosure & Disconnect?

Hi, I work for an equipment manufacturer. For a machine we are building, I have a VFD for an Exhaust Blower that requires 480 VAC 3-phase 6 amps. The VFD is designed so that it can be mounted on a wall without having to be inside an electrical enclosure. Typically, the exhaust blower is located inside a building. In these cases, I provide a… (Show more)

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chiefns830 (to pwk@kraemerkoating.com) 1 day ago (Show more Show less)

Sounds like you are making your own motor control panel. I'd look for the mark (for the enclosure as a whole) and not just that there is a listed disconnect incorporated therein...

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gonzalesj in Building & Life Safety2 days ago (Show more)

Generator back up

Hello, The backup generator for one of the data centers in my area has "thrown a rod" as reported by the owner. They do not have a timeline just yet for getting it replaced. This generator is the back up for the fire pump. What advice does the cadre have for how to proceed? Thanks in advance. Jason

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milt.werner (to gonzalesj) 1 day ago (Show more Show less)

Although these types of elaborate systems may not be specifically mandated, when provided, they must meet all applicable provisions of building safety codes such as NFPA 101. No one has mentioned the life safety features of means of egress that may be dependent on the alternate source of power. Something must be done with more immediateness than…

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lisamariesinatra

in FSI1 day ago (Show more)

Side-by-Side Burn in Hartsville, TN Demonstrates How Sprinklers Can Save Lives and Limit Damage to Homes

County commissioners, firefighters, and community members in Hartsville, Tennessee were able to see firsthand last week the value of residential fire sprinklers when representatives from the National Fire Sprinkler Association (NFSA) brought a side-by-side burn and sprinkler demonstration trailer to town to promote requiring sprinklers in new… (Show more)