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Auxiliary supply within LV switchboards

Pyro

Auxiliary supplies within LV switchboards, to serve a power monitoring meter, for example, are commonly taken from the main busbars via DIN or Red Spot fuses. However, the installation between the main busbars and these fuses is in no way rated for the prospective fault current. Is this practice recognised/formalised in regulations or codes of practice, somewhere? Ta!

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    yes - you need to be less than 3m long, and enclosed/protected  in a way that makes accidental damage unlikely.

    Look at when protection may be ommitted (Regulation group 433.3 , and/or Regulation group 434.3)  for the guidance.

    mike.

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  • 0

    yes - you need to be less than 3m long, and enclosed/protected  in a way that makes accidental damage unlikely.

    Look at when protection may be ommitted (Regulation group 433.3 , and/or Regulation group 434.3)  for the guidance.

    mike.

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