4 Key Changes 18th Edition Wiring Regulations

18th Edition - electricians in Edinburgh

18th Edition Electrical Wiring Regulations

As NICEIC approved Edinburgh electricians, Capital City Electrical always need to have an eye on the latest changes to electrical regulations. It has been known for a while that the 18th Edition was due to be published sometime this year. Changes to electrical regulations isn’t unusual. Updates tend to happen every few years and they usually have the effect of tightening up on some of the existing regulations as well as introducing some new ones.

As expected the 18th Edition of the IET Wiring Regulations (BS 7671:2018) was published earlier this month. What this means that all electrical work carried out in the UK must comply with these new regulations from January 2019. However this does not mean that work carried out previous to these changes is unsafe or needs redone, it just means that going forward all new electrical work must comply with the new rules.

What are the main changes?

  1. Protection against voltage and electromagnetic disturbances

Protection from the risk of transient over voltage caused by lightning will be required in certain scenarios e.g. where the consequences affect human life, public services, cultural heritage, commercial or industrial activity. In other cases a risk assessment will need to be carried out to see if protection against transient overvoltage is necessary. There is an exception made for single dwelling units (houses) in certain situations.

  1. Protection against fire due to thermal effects

Residual current devices (RCDs) reduce the number of fires due to earth faults but do not offer protection from fires caused by parallel or series arcing between live conductors. The installation of arc fault detection devices (AFDDs) is recommended in order to reduce the risk of fires due to the effect of arc fault currents.

  1. Energy Efficiency Changes

This change is to improve the energy efficiency in lighting, metering, cable and transformer losses, power-factor and harmonics. Points will be awarded for energy efficiency and then added together to give the electrical installation an efficiency class rating from EIEC0 to EIEC4

  1. Embedded Heating Systems

Regulations which cover floor and ceiling heating systems have been extended to cover embedded heating systems. The changes will apply to both indoor and outdoor systems

If you are looking for an experienced NICEIC electrical contractor you can trust to always work to current electrical regulations Capital City Electrical would love to hear from you. Please get in touch or give us a call on 0131 202 9188


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