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Modifying existing power

James Edward Duncan

A client of mine needs to re-route part of a number of small power circuits (230v, low amps). It is preferred not to replace the circuits in their entirety, due to hazardous materials in the location.

So, cutting the circuits and jointing the now 2 new ends with a new cable is the option available.

For me I would test the entire circuit end to end, however my client only seems to want to test the new section! How would I persuade them that this is the wrong thing to do?

Also, the older parts of the circuits are potentially 20+ years old. So when I do the insulation test, do I still test to current regs? 

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    James Edward Duncan: 
    Thank you Chris, the circuit is from DB, old cable, new cable, old cable, load. I take your point on the mandatory testing. Thanks. 

    So just splicing in a new bit of cable - I had imagined it the other way.

    I suppose that there is an argument that it doesn't need to be tested at all on the basis that it is repair work and not initial verification.

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    James Edward Duncan: 
    Thank you Chris, the circuit is from DB, old cable, new cable, old cable, load. I take your point on the mandatory testing. Thanks. 

    So just splicing in a new bit of cable - I had imagined it the other way.

    I suppose that there is an argument that it doesn't need to be tested at all on the basis that it is repair work and not initial verification.

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