It's worth noting that Dca cable, although Low Smoke Zero Halogen, still burns well and does not meet the latest BS6701 recommendation. In the event of a major fire in a new installation, it would be crucial to be able to explain why the latest BS Recommendations were not followed (The Grenfell Fire Disaster is an example of when product non-compliance goes wrong).
Note: BS6701 is a Recommendation whereas the Construction Product Regulations (CPR) compliance is a Regulation. Unfortunately, at the moment the two are not aligned and the CPR will still accept LSOH Dca rated cable.
Construction companies may argue that a lot of cabling goes into plastic trunking that is CPR compliant and not covered in BS6701. However, DSIS Solutions view is that for new builds or major refurbishments, the BS6701 2017 Add1 specification cable should be used. For existing buildings with old CPR rated PVC/LSOH cable, a Dca rated cable is acceptable.
One of the most critical requirements in the latest fire regulations is ensuring cabling above ceilings is secure on metal tray or with metallic fixings at intervals to prevent it from dropping into escape routes during a fire situation.
Ultimately, the decision on which cable to use must be made by the client/Consultant during the design stage and is not the responsibility of the cabling installer. Money can be saved using LSOH Cable but at what cost?
For more information on this subject please contact DSIS Solutions: info@dsissolutions.co.uk
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