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BS7671 Application to Power Stations

Please can someone offer some advice on the implementation of BS7671 on a new build power station in the UK. I have been challenged that the installation can be inline with IEC standards (because its a power station) , which to my understand isn't considered best practise in alignment with the requirements of the electricity at work regulations 1989.

In short my interpretation in the use of BS7671 covers the installation of LV electrical equipment to ensure that electrical installation work meets the requirements of the Electricity at Work Regulations 1989.

I'm not sure why anyone would specify an IEC standard for electrical installation when we have BS7671 that will similar but have UK specifics.

Also I am not sure why a 'power station' would be omitted from the scope of BS7671 when the electricity at work regulation 1989 applies there.

Any thoughts  on how to navigate this challenge would be appreciated?

Kind regards.

Chris

Parents
  • where on the planet is this power station?
    Arguably '7671 is just one of a number of regional derivatives of the harmonized international standards so most of the technical bits in BS 7671 start life at the IEC level, and progress to CENELEC, although sometimes in reality the development work happens in parallel. The international standard is known as IEC 60364, while the European standard is CENELEC HD 60364.
    So a design that meets '7671 should meet the CENELEC and by extension the IEC  requirements as well. The reverse is not always true, but read on ;-)
    Now the fact this is a power station is perhaps a red herring, as only the back office bits will be 400/230V low voltage, and will be done more or less like any other industrial setting. The actual power station parts will be at HV, though there will be a lot of control and monitoring that is mains fired much as there may be at, say a site like a large chemical works.

    HASWA does not require BS7671, which is good, as very few big installations meet it to the letter for all of the installation, and there are several corner cases, especially within test and research facilities, where it is not always a good fit to what is needed.

    What the law does require is that the installation is safe and demonstrably safe, and certainly for areas with some 13A sockets and some lights, then a very good way to meet the requirement is to design and test  to BS7671 so of course this is correct and perfectly acceptable to do.

    Or one could also achieve this perhaps by using an equivalent IEC derived standard from any other country, and also meet the legal requirements. It is harder, as you need folk here familiar with practice there, but it is not especially uncommon on sites for multinational collaborative projects, and 'local rules' wiring is also sometimes found in less industrial places like embassies.

    So its not as bad as you may fear...
    Mike

Reply
  • where on the planet is this power station?
    Arguably '7671 is just one of a number of regional derivatives of the harmonized international standards so most of the technical bits in BS 7671 start life at the IEC level, and progress to CENELEC, although sometimes in reality the development work happens in parallel. The international standard is known as IEC 60364, while the European standard is CENELEC HD 60364.
    So a design that meets '7671 should meet the CENELEC and by extension the IEC  requirements as well. The reverse is not always true, but read on ;-)
    Now the fact this is a power station is perhaps a red herring, as only the back office bits will be 400/230V low voltage, and will be done more or less like any other industrial setting. The actual power station parts will be at HV, though there will be a lot of control and monitoring that is mains fired much as there may be at, say a site like a large chemical works.

    HASWA does not require BS7671, which is good, as very few big installations meet it to the letter for all of the installation, and there are several corner cases, especially within test and research facilities, where it is not always a good fit to what is needed.

    What the law does require is that the installation is safe and demonstrably safe, and certainly for areas with some 13A sockets and some lights, then a very good way to meet the requirement is to design and test  to BS7671 so of course this is correct and perfectly acceptable to do.

    Or one could also achieve this perhaps by using an equivalent IEC derived standard from any other country, and also meet the legal requirements. It is harder, as you need folk here familiar with practice there, but it is not especially uncommon on sites for multinational collaborative projects, and 'local rules' wiring is also sometimes found in less industrial places like embassies.

    So its not as bad as you may fear...
    Mike

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