Evening all,
So, this is causing me some head scratching. Why oh why did this make it through the DPC?
As soon as an escape route is required to be of fire rated construction, we can't use it for main containment routes. Or am I missing something?
Evening all,
So, this is causing me some head scratching. Why oh why did this make it through the DPC?
As soon as an escape route is required to be of fire rated construction, we can't use it for main containment routes. Or am I missing something?
One could read this reg to require things that are only being possible in new buildings where dedicated cable runs can be cut, or the protected corridor gets smaller by a small partition to hide the wiring behind.
The DPC said
422.2 Protected escape routes
Cables or other electrical equipment shall not be installed in a protected escape route unless they are part of an
essential fire safety or related safety system.
NOTE 1: Generally, this means cables in a protected escape route should be limited to lighting, emergency lighting and fire
detection and alarm systems, although cables for other safety systems may be necessary. Hospitals may have special
requirements as detailed in Section 710.
NOTE 2: Guidance is provided in Appendix 13.
422.2.1
(i)
Only cables that meet the following requirements shall be installed in protected escape routes:
resistance to flame propagation according to the recommended requirements of the relevant part of BS
EN 60332-3 (series) or, where cable management systems according to (i) or (ii) below are used, to the
recommended requirements of BS EN 60332-1-2 and
(ii)
a minimum of 60 % light transmittance when tested in accordance with BS EN 61034-2.
but the appendix 13 had the cop out "Cables installed in a fire resisting enclosure are deemed to be outside the protected escape route."
Steel trunking anyone ?
and is the requirement for translucent conduit still there in the final version?
Mike.
One could read this reg to require things that are only being possible in new buildings where dedicated cable runs can be cut, or the protected corridor gets smaller by a small partition to hide the wiring behind.
The DPC said
422.2 Protected escape routes
Cables or other electrical equipment shall not be installed in a protected escape route unless they are part of an
essential fire safety or related safety system.
NOTE 1: Generally, this means cables in a protected escape route should be limited to lighting, emergency lighting and fire
detection and alarm systems, although cables for other safety systems may be necessary. Hospitals may have special
requirements as detailed in Section 710.
NOTE 2: Guidance is provided in Appendix 13.
422.2.1
(i)
Only cables that meet the following requirements shall be installed in protected escape routes:
resistance to flame propagation according to the recommended requirements of the relevant part of BS
EN 60332-3 (series) or, where cable management systems according to (i) or (ii) below are used, to the
recommended requirements of BS EN 60332-1-2 and
(ii)
a minimum of 60 % light transmittance when tested in accordance with BS EN 61034-2.
but the appendix 13 had the cop out "Cables installed in a fire resisting enclosure are deemed to be outside the protected escape route."
Steel trunking anyone ?
and is the requirement for translucent conduit still there in the final version?
Mike.
We're about to take you to the IET registration website. Don't worry though, you'll be sent straight back to the community after completing the registration.
Continue to the IET registration site