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BS7671 says refer to MI

Sergio Fernandez

BS7671 says refer to MI (Manufacturer’s Instruction) and MI can override BS7671 as it allows for new technologies.  However what if the MI is wrong?  Do we then need to go back to the document of conformity?  Was the conformity done before there was a BS/BSEN standard written?


As always please be polite and respectful in this purely academic debate.


Come on everybody lets help inspire the future.

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  • Sergio Fernandez said:
    BS7671 says refer to MI (Manufacturer’s Instruction) and MI can override BS7671 as it allows for new technologies. 

    Does BS7671 say that?

  • in reply to geoffsd

    133.5 - but you need to note a departure on the EIC.

    Often people take this and run a mile with it. According to many lecturers you can use SY cable because the MIs say so - but when you ask them when the last time they saw the MIs for some SY cable their face goes blank.

    I'm being unfair to lecturers - the curriculum for the ECS mandates a departure for no good reason.

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  • in reply to geoffsd

    133.5 - but you need to note a departure on the EIC.

    Often people take this and run a mile with it. According to many lecturers you can use SY cable because the MIs say so - but when you ask them when the last time they saw the MIs for some SY cable their face goes blank.

    I'm being unfair to lecturers - the curriculum for the ECS mandates a departure for no good reason.

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