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Clause 443 is likely to be significantly revised based on the recently published IEC and CENELEC standard. Protection against transient over-voltage would have to be provided where the consequence caused by over-voltage effects:
For all other cases, a risk assessment would have to be performed in order to determine if protection against transient over-voltage is required.
Chapter 42 contains the requirements for the protection of persons, livestock and property against fire caused by electrical equipment, against burns and overheating and for including precautions where particular risks of fire exist.
RCDs can reduce the likelihood of fires associated with earth faults. However, they aren’t able to reduce the risk of electrical fire due to series or parallel arcing between live conductors because there is no leakage current to earth.
Also, it is understood that the impedance of a series arc fault reduces the load current, which will keep the current below the tripping threshold of the circuit-breaker and the circuit-breaker may therefore not operate to disconnect the circuit.
For this reason, details will be included in BS 7671:2018 for the installation of arc fault detection devices (AFDDs) to mitigate the risk of fire in final circuits of a fixed installation due to the effect of arc fault currents.
The scope of Section 753 has been extended to apply to embedded electric heating systems for surface heating and includes electric heating systems for de-icing or frost prevention or similar applications, and cover both indoor and outdoor systems.
Major revisions will include regulations relating to the protection against the effects of overheating caused by electrical short-circuits in embedded units and relating to harmful influence between the heating system and other electrical and non-electrical installations and documentation.
The worldwide need to reduce the consumption of energy means that we have to consider how electrical installations can provide the required level of service and safety for the lowest electrical consumption. As such the new section will cover several energy efficient areas, such as electric vehicles, lighting, metering, cable losses, transformer losses, power-factor correction, and harmonics.
WHAT IMPACT IS BREXIT GOING TO HAVE ON THE REGS?
We posed this question to Steven Devine of the IET at the recent ELEX show in Harrogate, North Yorkshire….
He assured us that as CENELEC is a European organisation and has a membership of 33 European states (i.e. more than just the EU states). The consequences of Brexit and the withdrawal of the UK from the European Union should not affect the UK membership of CENELEC.
WHY CHOOSE TESLA TECHNICAL TRAINING
We offer unique solutions to all our clients, with the major advantage of a fully mobile training delivery operation. This means that we can deliver the training anywhere in the UK, thus providing the most cost-effective solution.
Possessing City & Guilds Approved Centre Status provides our clients with an assurance of the quality of training that we provide, coupled with the fact that we are a company that is solely owned and run by specialist electrical engineers and approved instructors ensures delivery of the highest quality, which is always accurate and up-to-date.
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