18th Edition Article ImageThe Institution of Engineering and Technology (IET) is calling on the electrical industry to have its say and influence the content of the 18th Edition of the IET Wiring Regulations (BS 7671), following the release of the Draft for Public Comment (DPC) for BS 7671:2018.

“It’s essential that anyone who feels that they have something to contribute to the draft BS 7671 standard make full use of the public comment period to have a say on its provisions.” says Alan Wells, Technical Standards Director at Certsure.

You have until 23rd August to have your say on the proposed changes to the IET wiring regulations.

Now is a good time to to review your company’s training, procedures, methods and safety overview ahead of next year’s changes to the IET Wiring Regulations (BS 7671). MCP outlines the likely major additions and amendments.

1. Protection against overvoltage and transient overvoltage

This means protection of installations of overvoltage from within, as well as from external overvoltage, sources could be provided by Surge Protection Devices (SPDs). Overvoltages which affect human life, public services and commercial and industrial activities are included. In all other cases (i.e. domestic) a risk assessment could be required to determine whether this protection is required. It’s suggested that in these circumstances, (for a single dwelling) where the total economic value of the installation is less than five times the value of an SPD, this may not need to be used. It’ll be interesting to see how demographic differences in dwelling costs can be included within this calculation.

2. AFDD installation

Protection against fire has been around ever since electricity has been used within
buildings. Although RCDs may be used to reduce the effect of fire, these don’t distinguish between series or parallel arcing between live conductors. For this reason, the BS7671:2018 will include the installation of arc fault detection devices (AFDD) to reduce the risks of faults within the fixed installation.

3. Electric surface hearing

Section 753 (Floor & Ceiling Heating Systems) will be extended to include embedded electric surface heating. This will apply to electric heating systems for de-icing and frost protection for both internal and external conditions. Areas to be included are heating systems for walls, floors, ceilings, roofs, drainpipes, gutters, pipes, stairs, roadways and non-compacted outdoor areas (playgrounds and lawns). As walls are more susceptible to potential damage than floors, protection will be required to heating systems within these areas from penetration of the heating elements by (for example) earthed metallic grids.

4. Energy Efficiency

A new section to provide for Energy Efficiency will also be included which will address the ever-increasing need to reduce
the energy consumption of installations. Draft proposals provide the client with the ability to specify the level of energy efficiency to be applied to the electrical installation (e.g. transformer and power factor correction). These efficiency measures can be added together to provide a class of “electrical installation efficiency”, ranging from EIEC0 to EIEC4 (dependant on the efficiency of the systems). This section will cover vehicle charging points, lighting, metering, cable losses, transformer losses, PF correction and harmonics.

Please contact us for a pdf of the full article from the Professional Electrician