Recent Posts

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Q & A / Re: Mobility Scooters - Technical Queries
« Last post by Tadees on Today at 09:59:55 AM »
I have read this previously, but it doesn?t answer the specific questions raised.
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Q & A / Re: Mobility Scooters - Technical Queries
« Last post by Fishy on November 26, 2020, 12:56:47 PM »
The work BRE did on this a few years back is probably as good a place as any to start:

http://www.bre.co.uk/filelibrary/Fire%20and%20Security/FI---Trust-Report-Mobility-Scooters-May-15.pdf

https://www.bregroup.com/buzz/mobility-scooter-fire-experiments/

With regard to (F) - in terms of fire performance I doubt it - when l last looked into it there were no British standards for cars, so I'd be surprised if there were for mobility scooters.
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Q & A / Mobility Scooters - Technical Queries
« Last post by Tadees on November 26, 2020, 07:40:31 AM »
Hi All,

I was hoping someone on here could fill some knowledge gaps for me regarding mobility scooters.

(A) I read everywhere that charging mobility scooters in communal areas is a risk, but from a technical perspective what specifically is the cause of fires from charging?

(B) I?ve also read that even when not on charge there is a lower risk of fire. What would be the cause of that?

(C) Are there certain batteries that should not be used?

(D) What is the standard of battery and charging equipment to be used?

(E) Why is removing the battery from the mobility scooter and charging it less of a risk?

(F) Is there a British Standard in relation to the materials to be used when manufacturing mobility scooters?

(G) What are the key signs to the naked eye in terms of the battery & charging equipment that should start alarm bells ringing?
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Technical Advice / Re: Emergency lighting changes
« Last post by Graeme on November 23, 2020, 11:54:00 AM »
There is a good case for bringing back the 6 month test. There are some absolutely crap fittings out there that don?t last one year from new. I mentioned before that we installed over 100 LED units in an office block, well-known manufacturer, only to find 30% failure rate at the first inspection some 12 months later. Let me tell you that this is not an unusual situation!

Agreed - very common and well known brands
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Technical Advice / Re: Passive protection of external escape routes.
« Last post by mtatte on November 20, 2020, 01:52:13 PM »
Seetek - apols for delayed response.  Sincere thanks for your guidance - this has been bugging me for weeks but no longer!  :)
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Portable Firefighting Equipment / Re: CO2 extinguisher in a confined space
« Last post by AnthonyB on November 16, 2020, 07:33:15 PM »
No UK guidance, plenty in other countries.

In Germany the following guidance is in place in DGUV* Information 205-034#:
Per kg CO 2 extinguishing agent there must be at least a free floor area * of 5.5 m? are available for a person in the room. Specifically, that means:

A 2 kg CO 2 fire extinguisher requires at least 11 m 2 of free floor space.

A 5 kg CO 2 fire extinguisher requires at least 27.5 m 2 of free floor space.

If the size of the extinguisher required for the risk is greater than that permitted by the room size then it has to be mounted outside the room and signed to be discharged from outside the room only.

*The DGUV (German Social Accident Insurance) is the umbrella association of the statutory accident insurance organisations in Germany. It represents around 70 million people insured against the risks of work accidents/ occupational diseases (employees, students, schoolchildren i.e.) In the event of a work accident or occupational disease the accident insurance funds are responsible to grant comprehensive healthcare.
# The information sheet was based on a range of practical experiments on a range of typical workplace rooms and with different layouts and furnishing

Because the other EU countries have always been happy to use water and foam extinguishers that have passed the 35kV test on electrical fires up to 1000V this safety restriction on the use of CO2 doesn't cause many issues, but if adopted in the UK would cause upset as it's restricted the use of wets to keep up the use of additional CO2 extinguishers, hence why no mention. Germany in particular is pushing to reduce the indoor use of powder and replace with foam but not having the need for CO2 as well, it being reserved for risks needing a clean agent.
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Portable Firefighting Equipment / CO2 extinguisher in a confined space
« Last post by nim on November 16, 2020, 03:11:56 PM »
Does anyone have an idea when a confined space would be unsuitable for a 2kg or 5kg CO2 extinguisher?

Occasionally we have been told by Risk Assessors that CO2 extinguishers should be removed from Lift Motor Rooms/Electrical Mains Intake rooms because CO2 is an asphyxiant and not suitable for a confined space.

On one occasion we were told by a Risk Assessor to replace a CO2 with a Water Mist.

For some Risk Assessors there seems to be a blanket ban on CO2 Extinguishers either recommending something else e.g. Water Mist and for some Risk Assessors there seems to be no issue and on occasion recommending a CO2 extinguisher.

Is there guidance anywhere?
When does a confined space become a confined space for a CO2 extinguisher?
What do we use instead of a CO2 extinguisher?
Do we use a suppression system instead?
Would you recommend another type of extinguisher? E.g. Water Mist?
Is a 2kg CO2 extinguisher more suitable than a 5kg Co2 because the volume is less?

Thanks in advance for your help
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Technical Advice / Re: Wiring covering lightning protection strips
« Last post by lyledunn on November 16, 2020, 09:36:46 AM »
Flashover is an issue but the lightning conductors are normally routed outside so any ignition potential in the immediate vicinity is probably unlikely. However, any flashover current or indeed current caused by inductive coupling could have devastating consequences on the low voltage cable and electronic components to which they connect. That is definitely a potential ignition source but as to an actual cause of fire that I am aware of, I do not know.
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To be fair to my employer (which I rarely am), this short 5 min video will cost ?2k+ to make when you take into account salaries, editing facilities and expenses. All this for approx 50 Class D extinguishers across the estate. But without a suitable ready made video on the market which would perhaps costs a ?150/?200, we have no choice

I have suggested a second edit of the video we can sell for a small fee - say ?70 - that may over time, pay for the production costs of the main video, but it is not something my employer wish to diversify into at this time.

The video will also contain technical/processing/production information which they would not want on YouTube, and my employer are pretty keen on protecting intellectual property rights, so I can understand their reluctance in sharing their finished video on any open source platform.  We will be sharing it with trusted partners, just not everyone.

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The only large internal weather proof covered space we have has ?millions of technical stock so although it is suitable, I am not keen on using that location!!!

Sadly my rather tight employer  will not be up for sharing the video which is a shame

If your rather tight employer was up for sharing the video the local fire service might be able to arrange a venue and crew etc as a joint training / public relations event to everyone's benefit.
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