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BS7671 Amendment 4. Sidebar markers

JohnE

I have the Bronze digital subscription package

I've noticed that the online edition does not have the vertical marker lines
on the right hand side of the page to highlight a change from the previous editions.
I have been informed that the lines are in the gold subscription.


Any ideas why
  • 0 in reply to Chris Pearson
    Chris Pearson said:
    Surely that is maximum, not minimum?

    Yes, sorry ... 

  • 0 in reply to Chris Pearson
    Chris Pearson said:
    Looking back to the blue book, it explained in the note to A722.3 that where the equation was invalid, condition (i) in 722.411.4.1 applied, but that was deleted in the brown book.

    Below is NOTE 1 to A722.3 from Amendment 1:2020 to BS 7671:2018 (with my highlighting):

    The reason NOTE 1 was changed in BS 7671:2018+A2:2022, is that 722.411.4.1 (i) was deleted.

    Therefore, the 'phase balance' option not being available to you, the earth electrode would have to remain ... although its value should not exceed 200 Ω as the note to Table 41.5 tells us values above this might not be stable. Hence, NOTE 1 was re-written for BS 7671:2018+A2:2022, but, having a different 'sense', the sign in the inequality was not amended correctly ... leading to the error discussed above.

    Hope that makes sense ... it was a change necessary as a consequence of changing something else, if you will.

  • 0 in reply to gkenyon

    Style changes (such as moving to all caps, or changing list formats) have not changed the actual of the requirement, and therefore were not considered a 'change' - it's just formatting.

    That's what I would have expected, yet such changes seem to be triggering change bars (e.g. 411.8.1.2 or the 2nd line of 434.5.3 (a)). (Unless there some other change I've overlooked)

       - Andy.

  • 0 in reply to AJJewsbury
    AJJewsbury said:
    That's what I would have expected, yet such changes seem to be triggering change bars (e.g. 411.8.1.2 or the 2nd line of 434.5.3 (a)). (Unless there some other change I've overlooked)

    Interesting, the changes there are 'rms' to 'RMS' and the inclusion of the word 'or'. I can see the latter is definitely a change to be marked, but the change bar for the former is, perhaps, unnecessary.

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