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Using BS3871 MCB to protect ne submain

Alan B

Is it ok to connect a new submain to an existing spare 3 phase BS3871 MCB in a light industrial installation. The alternative is to change the entire main DB.

Submain will be clipped direct to wall and steel roof beam. It will feed a new 3 phase DB, probably equipped with two 3 phase 16A MCB's.

My understanding is that BS 60898 replaced BS3871 and the standards are similar, I am sure there are some differences, but do they make a significant impact on safety? In my mind providing they disconnect in the required time everything should be acceptable? Main risks will be after the sub board using modern devices.

Thanks

Parents
  • 0

    Yes, but it is time to be thinking about updating the 40 year old DB. Are there any BS 4293 RCBOs to accompany the ancient MCBs?

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  • 0

    Yes, but it is time to be thinking about updating the 40 year old DB. Are there any BS 4293 RCBOs to accompany the ancient MCBs?

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