Tamper Resistant Flow Switch
Tamper Resistant Flow Switch
(OP)
NFPA 72 Section 6.8.5.11 references flow switches that require a tamper resistant cover. The tamper resistant screws are not mentioned, but a monitored contact that reports to the FACP. Typically we do not require this specific type to be installed, nor do we see them in the field. Is it the intention of 72 to require contact closures on the flow switch covers to help identify possible tampering, or am I missing the ball completely?





RE: Tamper Resistant Flow Switch
RE: Tamper Resistant Flow Switch
The last one I saw was on a military project.
Travis Mack
MFP Design, LLC
RE: Tamper Resistant Flow Switch
Tamper resistant screws or other approved mechanical means shall be permitted for preventing access to junction boxes and device covers installed outside of buildings." which on the face of it suggests this is no longer allowed inside the building. This appears odd, as I would suggest the device inside is likely to be more secure than one outside. If the intent is to signal the FAP for tampering now, I cannot think of a reason for the exception.
RE: Tamper Resistant Flow Switch
Thanks for your response lightecho
RE: Tamper Resistant Flow Switch
Did you ever hear back From NFPA on this issue?
RE: Tamper Resistant Flow Switch
You would need to take into consideration the exceptions at the bottom of the main text and then monitored covers on j boxes outside would not be required if tamper resistant screws were used.
"Exception No. 2:
Tamper resistant screws or other approved mechanical means shall be permitted for preventing access to junction boxes and device covers installed outside of buildings".
-But it does not really answer my original question. When I reasked the same question (worded more clearly) they gave me the exact same answer. Really they where of no help.
It appears that this section only refers to outside devices and not address interior devices. I have a feeling we are going to have a battle with the local Fire Marshal since it was after the contract was awarded and the 997,000 sq ft bldg was under significant construction before this 'requirement' came up. Still trying to get everything lined up so that we can educate him a little on the intentions of 72 and tamper resistant devices.
Thank you for your interest
RE: Tamper Resistant Flow Switch
Just to note:t the tamper switch inside is not meant to be a supervisory signal and is merely tied in with the alarm line back to the FACP. Really, even if you have hundreds of flow switches there is no real additional labor involved.
Regards
Dave
RE: Tamper Resistant Flow Switch
Regards
Dave
RE: Tamper Resistant Flow Switch
"Fire suppression is a failure in prevention"