A firefighters view on the premature collapse regulation - A SparkyNinja Webinar
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- เผยแพร่เมื่อ 8 ก.พ. 2025
- This is a recording of a webinar given on the 7th April 2020.
Phil puts his old firefighters hat on and discusses with us the introduction of the regulations regarding the measures to prevent premature collapse of wiring systems.
We'll discuss the history which caused the regulation, the current applications and what its actually like to be in an installation with premature collapsed cabling.
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I'm going to watch this a second time and possibly a third... Loads of pauses for thought....nuggets of gold to digest. Well done sparkyninja.
Thanks for posting. This was fascinating. Not an electrician by trade, but an IT pro. Will definitely bear this in mind the next time I either run cable or contract the job out.
Great listen 👍
What temperature are there's metal fixings designed to work up to. The ex fireman was talking about temperatures over a 1000 degrees, mild steel has a melting point of between 1300 - 1500 degrees. That's assuming these clips are made from mild steel.
The compartment with fire in will be >600 degrees at ceiling height.
Heat transfers by radiation, conduction, convection. Smoke is hot, several hundred degrees hot. Smoke convection is what was causing the plastic conduits to melt in Shirley towers.
In Shirley towers the fire was in the lounge and kitchen on the 9th floor. The wires dropped on the 9th, 10th, 11th floor and 11th floor corridor outside the flat. That’s all radiated heat, convection heat from the heated smoke. Not direct fire contact.
This means the Firefighters couldn’t get to the fire front to extinguish it easily, nor could they freely escape. From memory 6 firefighters became entangled in Shirley towers, 2 died with wired wrapped around their BA sets, helmet, neck and arms.
As far as my understanding is (fire background not electrician), by having metal fixing, they will have a similar melt point/fail point as the wiring itself, it should mean that wires will be burnt away not causing an entanglement hazard at the same point or before the metal clips fail.
In a room with a fire, I’d expect to find wires dangling down, and I’d be firefighting from the door. In the corridors leading to and from that haven’t had direct flames in, the temperatures are such that metal fixing should offer enough support to keep the corridors clear of dangling wires.
I hope that’s not come across condescending. It’s quite hard to be concise on an issue with so many factors