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Old Distribution Board and Present Certification

Les Spiteri
Recently we have been asked to install new cabling from an existing DB board (which is very old BS88 style fuses). I have been told that in order to certify the work then we have to change the DB board.
  • Is this absolutely correct, are there circumstances where you can add cables(s) to existing DB board and ensure your work/modifications are 18th Edition compliant?

  • Otherwise when cabling for new kit was required then installations would have to change DB boards on regular occurrences.

  • I would imagine there are circumstances that this would be deemed not realistic or practicable (which seems to be the expression used).


On this occasion its a 3ph DB board.


Could any of you comment on your experiences in this area please?
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    There is nothing wrong with any of your list. MCBs may seem to be nice but in an industrial environment, BS88s are often better and just as convenient. The only snag with fuses is that they are not ganged, so the loss of a single fuse may damage certain loads (typically motors) due to phase loss. However, correctly set motor overloads should cope with this in most instances. Fuses are perfectly in line with BS7671, certificates should be no problem.
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    There is nothing wrong with any of your list. MCBs may seem to be nice but in an industrial environment, BS88s are often better and just as convenient. The only snag with fuses is that they are not ganged, so the loss of a single fuse may damage certain loads (typically motors) due to phase loss. However, correctly set motor overloads should cope with this in most instances. Fuses are perfectly in line with BS7671, certificates should be no problem.
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