Code Enforcement

kbbourne in Code Enforcement1 day ago (Show more)

allowable distance between smoke detectors

I work in a nursing home in the state of Ohio can anyone tell me the max allowable #distance between smoke detectors and how close a air diffuser or damper can be to a detector? or what code governs this? thanks!!

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cdafd (to kbbourne) 1 day ago (Show more Show less)

You are talking smoke detectors tied into a full fire alarm system?? If so NFPA 72 is the standard for spacing. Normally 30 feet as you walk between smoke detectors. That can be extended to I think 42 between on narrow, low ceiling corridors. Your fire alarm company should be able to answer all these questions. there are other…

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otorres in Code Enforcement1 day ago (Show more)

NFPA 780 Number of down conductors required

I have some questions about the number of down conductors required on a flat/gently sloping roof and a wall; For a wall, say a mechanical yard wall that is 440' feet long and 1' wide, from one end to another that do not meet, how many down conductors are required? I say it is 6 since one is required at each end and 4 so that spacing does not… (Show more)

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chriscarlson (to otorres) 1 day ago (Show more Show less)

NFPA standards/codes are written in a numerical hierarchy. If you start with 4.9.10 you see that all structures require two down conductors. Moving onto 4.9.10.1, the requirement states that additional down conductors are required once the structure exceeds 250 feet in perimeter. A possible fix to the confusion would be to move 4.9.10.2 into…

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david.michel in Code Enforcement5 days ago (Show more)

Free Air conductors????????????

I have had zero luck with this but several differing opinions We were trying to judge the ampacity of an existing cable, 3 conductors 500KCM in one jacket or cable. This cable is attached to building rafters, about 10 ft between rafters and the cable is surrounded by air above below beside and is indoors near roof no other conductors … (Show more)

samuel.scorsone in Code Enforcement6 days ago (Show more)

NFPA-13 Sidewalls installed below Cloud Ceilings

Recently had a Sprinkler contractor suggest installing sidewall sprinklers under an existing cloud ceiling as a cost savings instead of installing pendents. My first thought was that this unusual and probably not per NFPA 13. I did some digging into NFPA 13 but nothing jumped out and will have to do some more research. Thoughts? Thanks!… (Show more)

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milt.werner (to samuel.scorsone) 5 days ago (Show more Show less)

2016 NFPA 13 is now having prescriptive criteria for cloud ceilings. In the past, it required much subject of how to sprinkler these areas. Excerpt from 2016 NFPA 13: This was in the subsection for concealed spaces not requiring sprinklers. These were the referenced requirements and no more. The sprinkler protection under the cloud…

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ramon.aparece in Code Enforcement7 days ago (Show more)

Fire Pump Start and Stop Settings

Actual settings of the fire pumps at the pump room during the visit are as follows; Maintaining pressure : 0.90 Mpa (130.5 Psi) Pump Rating Cut in Cut out Jockey Pump A & B 15 Kw each 90 Psi (0.62 Mpa) 145 Psi (1 Mpa_ Electric Motor Driven Pump A & B 150 Kw each A = 57 Psi (0.39 Mpa) 145 Psi (1 Mpa) B= 84 Psi… (Show more)

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nocivus (to ramon.aparece) 5 days ago (Show more Show less)

Yes. Although keep in mind that the settings found in NFPA 20 are suggested, not mandated. On occasions a pump will require a particular setting due to circumstances (that's when common sense and experience applies). In other occasions AHJs will require their own provisions (FM Global).

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ablewire in Code Enforcement1 month ago (Show more)

As an electrical inspector I was asking the Lightning protection contractor how they were verifying torqued value of the bolted clamped cable connections on the roof of the building.

Am I being over zealous in my inspection duties. I did contact the equipment manufacturer and was provided a written recommended torque setting. The LP contractor has basically said these instructions are suggestions and they do not have to verify this for their LPI certificate and were not going to comply with my request. Thanks in advance for… (Show more)

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chriscarlson (to ddhoffman02) 5 days ago (Show more Show less)

This may be changing in the upcoming years, there is really no reason why an electrical inspector cannot inspect the installed lightning protection system. Honestly, it really should be done that way. You as an inspector are on-site numerous times checking and confirming various stages of construction. As it stands at the moment, an on-site…

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jr1884 in Code Enforcement6 days ago (Show more)

ferrules

I have worked with many licensed contractors in California. I do the PLC programming and I always do a visual inspection of the panel before I start programming. I have always referred to NFPA 79 for machine wiring. Previously contractors used wire ferrules on all wiring in the 24vdc control panel. I’m currently tasked with working on a… (Show more)

stamme in Code Enforcement1 week ago (Show more)

Classroom door closure devices during and ASHE incident

Would there be a Code violation if a door closing device were used to prevent a "shooter" from making entrance? (ie: small section of fire hose placed over the door closure device which would act as a deterrent) I was asked this question by a public school official in charge of security and emergency management. He was concerned that the device… (Show more)

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milt.werner (to stamme) 1 week ago (Show more Show less)

I recommend the school administration adopt the 2018 NFPA 101, Life Safety Code for the existing buildings. Its most interesting that the building code deals with new construction not existing occupancies. Therefore the AHJ dealing only with the building code will naturally require new construction for renovations. Excerpt from 2018 NFPA 101:…

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sreeku727 in Code Enforcement2 weeks ago (Show more)

HYDRANT INDIVIDUAL ISOLATION VALVE

Reference to Sections - 7.1.1.2 , 7.1.1.2.1 , FIGURE A.7.3.1(a) & (b) of NFPA 24 regarding 'a valve shall be installed on each hydrant'. Reader understand that "Hydrants" referred in NFPA 24 are basically Dry hydrants or hydrants in freezing area. Hence a valve is required (SHALL) to be installed on a hydrant connection to the main with self… (Show more)

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milt.werner (to sreeku727) 1 week ago (Show more Show less)

Yes. A control valve installed on each private fire hydrant must be installed within 20 ft (6.1 m) of the hydrant in accordance with Section 7.1.1.2.1 of the 2016 NFPA 24, Standard for the Installation of Private Fire Mains and Their Appurtenances. If connecting public fire hydrant to a public service main you should consult with the…

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samuel.scorsone in Code Enforcement2 weeks ago (Show more)

NFPA 72 Magnetic Door / Initiating Device?

NFPA 72 - Ch 17: At one of our buildings, we have magnetic door hold opens for a fire-rated wall opening right next to a cooking hood that has 3 times now tripped a smoke detector….(this wall is not a smoke partition) and the magnetic hold opens release upon smoke activation…..they also initiate a fire alarm. Are they required to be an… (Show more)

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milt.werner (to samuel.scorsone) 1 week ago (Show more Show less)

Hi Sam: You may be making the mistake of prematurely diving into the installation standards (NFPA 72) before checking the Life Safety Code or ICC Code for an existing building to see if the occupancy requires when to do the fire barriers. I would start with a more comprehensive occupancy review for the existing building in the NFPA 101,…

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