Cable Standards: Fire Safety

Heather Wheeler Excerpts

Monday 26th March 2018 Commons Chamber

[The Parliamentary Under-Secretary of State for Housing, Communities and Local Government (Mrs Heather Wheeler)]

I am grateful to the right hon. Member for Knowsley (Mr Howarth) for raising the important issue of cable standards and fire safety. He has spoken about the Safer Structures campaign. Ministerial officials met representatives from the campaign last week to discuss issues around cable fire safety, and I hope that dialogue can continue.

Any debate about fire safety is of course overshadowed by the terrible events at Grenfell Tower last June. We must ensure that an event such as that cannot happen again. The public inquiry is looking at the circumstances of the fire, and we have commissioned an independent review of building regulations and fire safety to ensure that we have a regulatory system that is fit for purpose to deliver safe buildings.

When considering the fire safety of cables, there are three main aspects. The first is cables continuing to provide power to life safety systems in the event of fire. This is known as fire resistance of cables. Secondly, is the way in which cables burn, including how much smoke they produce. This is different to fire resistance and is known as reaction to fire. The third aspect is cables collapsing in a fire and preventing people from evacuating the building or hampering emergency services. I will set out how each of these aspects is controlled within the current system.

The right hon. Gentleman referred to European legislation. He was referring to the construction products regulation, which governs how construction products are placed on the European market, including those in the UK. The regulation works by requiring that products covered by a European harmonised standard must have a declaration of performance against key characteristics and must be CE marked. The European standard for cables, EN 50575, came into effect, as he said, in July 2017. This means that all electrical cabling should be tested for their reaction to fire and assigned to a performance class, which should be set out in the declaration of performance. It is up to member states, exactly as the right hon. Gentleman said, to determine whether they wish to set a minimum performance class through, for example, their building regulations. I would like to set out the ways in which our current regulatory system controls the safety of electrical cables in buildings.

The Government set standards for fire safety in buildings through part B of the regulations and approved document B. Approved document B contains guidance for the minimum fire resistance of electrical cables to ensure that life safety systems, such as fire alarms and emergency lighting, can operate during a fire. Also in approved document B are standards that attempt to prevent the spread of fire within a building—for example, in concealed voids where there may be large concentrations of electrical cables. Guidance states that physical barriers should be present to prevent fire and smoke spread within the void and throughout the building.

There are further standards for cables in electrical safety standards. The building regulation part P and the electricity at work regulations set requirements for electrical safety of work in homes and workplaces respectively. In both cases, the approved way to comply is to follow the British standard BS 7671, commonly known as the IET wiring regulations. BS 7671 is a long-standing and well-respected document, which sets a high standard for the electrical safety of installations, as the right hon. Gentleman said. Providing good-quality electrical work, in compliance with BS 7671, is the best way to reduce the risk of electrical fires starting in the first place. An example of BS 7671 improving standards is in requiring fire resistant supports for cables to prevent the cables collapsing in the event of a fire. This has been in the standard since 2015.

The BS 7671 standard also sets requirements for the reaction to fire from cables, equivalent to class E in EN 50575 under the construction products regulation. I am aware that BS 7671 is due to be revised in July 2018 and my officials have been working closely with the technical committees responsible for its contents. It is my understanding that the approach to reaction to fire is not due to change in the new edition, although there will be some further clarification on fire resistance supports for cables and a new reference to the requirements of the construction products regulation. I will be asking my officials to review the 18th edition of BS 7671 when it is published in July, and considering how we might reference the updated standard in our approved documents in future.

I understand that parts of the electrical cable industry think that the standard for fire reaction of cables should be higher. I am aware that there are differences of opinion on this matter within the industry technical committees and between different cable manufacturers in the UK. Some parts of the industry favour setting cable performance in response to the risk, which is how the existing system works, while others are asking the Government to set a blanket standard for all cables. I mentioned earlier that we have commissioned an independent review of building regulations and fire safety, as the right hon. Gentleman said, which is being led by Dame Judith Hackitt. Dame Judith’s interim report was published in December. In it, she identified product testing and quality assurance as one of the key areas she will focus on as she drafts her final report.

[Jim Shannon]

How can the Minister encourage electrical contractors to adhere to the new conditions to ensure that cables are sound and homes are safe?

[Mrs Wheeler]

I thank the hon. Gentleman for his second contribution tonight—the usual high standards for Strangford. The important thing is that BS 7671 in its 18th iteration will have that at its heart, because what we all want is safe cabling for the future for all our sakes.

I mentioned the independent review of building regulations. Dame Judith’s interim report was published in December. She is looking at identifying product testing and quality assurance as one of the key areas that she will focus on as she drafts her final report. I believe that that will answer the fifth question—I think—from the right hon. Member for Knowsley.

Dame Judith is due to produce a final report in the spring, after which the Government will consider her recommendations, including any specific recommendations concerning product testing and safety. I am happy to tell the right hon. Gentleman that as part of our consideration of Dame Judith’s recommendations, we will review the evidence of risk associated with electrical cabling to consider how we should respond. If he or other hon. Members have evidence that it would be useful for us to consider, please send it in to the Ministry.

In conclusion, a system of regulation is in place that controls the fire safety of cables. We do this through a number of regulations that work together to consider the fire performance of cables in the context of the building and to manage the risk appropriately. However, we recognise the importance of the issues that were raised by the right hon. Gentleman and the Safer Structures campaign. We await the recommendations of Dame Judith Hackitt’s review.

[Mr Howarth]

I am trying to reconcile a couple of statements that the Minister has made. On the one hand, she recognises that there is room for improvement, but on the other hand, she seems to be saying that everything is okay. They cannot both be right. Does she accept the point that I made in one of my questions, which was that this really does need some energy behind it if we are going to reach a constructive and better system?

[Mrs Wheeler]

I thank the right hon. Gentleman for his intervention and for repeating his question. The difficulty is that there is not agreement in the market. He has one producer in his constituency and he is doing a grand job of standing up for them, but the market is not in agreement on this matter, which is why we have to look at all the evidence and take it forward from there.

[Mr Howarth]

Will the Minister give way?

[Mrs Wheeler]

No, if the right hon. Gentleman does not mind, I am just going to conclude. We await the recommendations of Dame Judith Hackitt’s review. In the light of those, I am happy to confirm that we will work with the industry to review the evidence base for enhanced cable fire safety performance. Thank you, Mr Speaker, and I thank the right hon. Gentleman for bringing this matter to our attention.

Question put and agreed to.