Discuss Fuse board protection against fire in the UK Electrical Forum area at ElectriciansForums.net
When using rear entry the knock outs tend to be huge. This can be reduced by cutting smaller holes in the surface you are mounting to.Hi guys interested to know what people on here use to keep the fire integrity off the fuse board for rear entry cable entering the board. Thanks
Makes additions a bit of a pain.I use fire mate, you can get it from Toolstation for £3
Fire Mate Intumescent Acrylic Sealant
This fire retardant acrylic sealant can be used to seal joints and cavities in firewalls, as well as pipe and cable penetrations. It can also secure the internal perimeter of fire-rated door and window frames. When exposed to heat the sealant swells to over 150% of its original size to block the...www.toolstation.com
View attachment 64692
Look again Matthew;There is no requirement or regulation to do so, only to maintain ip rating of board. So nothing.
I cannot see at any stage where that regulation mandates sealing a consumer unit where rear entry is being used. Maybe it's my interpretation of it, but if you could point out exactly where is says I have to seal the rear of a consumer unit with intumescent sealant I'd appreciate it.Look again Matthew;
Regulation Group 527 - Sealing of wiring system penetrations.
527.2
Where a wiring system passes through elements of building construction such as floors, walls, roofs, ceilings, partitions or cavity barriers, the openings remaining after passage of the wiring system shall be sealeda accordingto the degree of fire-resistance (if any) prescribed for the respective element of building construction
before penetration. This requirement is satisfied if the sealing of the wiring system concerned has passed a relevant type test meetingt therequirements of Regulation 527.2.3.
There is no degree of fire protection assigned to a consumer unit, the only stipulation is thay that the material is non combustible. This regulation is relevant to fire barriers and cables passing through them such as a 30min fire barrier or fire rated suspended ceiling, and sealing them to the correct rating after making a hole or entry in then for a cable to pass through. Although I understand where your coming from, it's totally irrelevant to a consumer unit, unless it is directly mounted on a fire barrier.Look again Matthew;
Regulation Group 527 - Sealing of wiring system penetrations.
527.2
Where a wiring system passes through elements of building construction such as floors, walls, roofs, ceilings, partitions or cavity barriers, the openings remaining after passage of the wiring system shall be sealeda accordingto the degree of fire-resistance (if any) prescribed for the respective element of building construction
before penetration. This requirement is satisfied if the sealing of the wiring system concerned has passed a relevant type test meetingt therequirements of Regulation 527.2.3.
The key note here is passing through certain protective elements. Should a wiring system breech a barrier or fire stop then yes it is compromised and requires some level of reinstating. Cables from the rear of a consumer unit into a cavity will not breech anything as such it just enters the cavity where, depending on the age of the building there will be cavity barriers to prevent the spread of smoke.Look again Matthew;
Regulation Group 527 - Sealing of wiring system penetrations.
527.2
Where a wiring system passes through elements of building construction such as floors, walls, roofs, ceilings, partitions or cavity barriers, the openings remaining after passage of the wiring system shall be sealeda accordingto the degree of fire-resistance (if any) prescribed for the respective element of building construction
before penetration. This requirement is satisfied if the sealing of the wiring system concerned has passed a relevant type test meetingt therequirements of Regulation 527.2.3.
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