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Recommended checks before CU change

Former Community Member
Former Community Member
As most of you know I’ve only been qualified for just over a year and I’ve got a quote to do for a cu upgrade.


I know I’m nowhere experienced enough to do EICR’s yet, but what would you guys recommend I check/test before doing the cu upgrade and should I do these checks/tests at the quote stage?
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  • 0
    For a Ze test, to do it safely you could use a longish insulated probe for the L connection, with a very short exposed tip.  Main switch OFF, carefully disconnect the main earthing conductor, carefully connect croc. clip to separated main earth conductor first, then apply  insulated probe to L of incoming supply. Then test. No fingers needed near live parts.


    After test, remove insulated probe first, then earth croc. clip secondly.

    ...............................................................................................................

    Always connect the safest clip/probe first ( E or N) then the more dangerous one (L) afterwards for the test.


    Always disconnect the most dangerous connection (L) first and the safest one (E or N) last immediately after the test.


    Z.
Reply
  • 0
    For a Ze test, to do it safely you could use a longish insulated probe for the L connection, with a very short exposed tip.  Main switch OFF, carefully disconnect the main earthing conductor, carefully connect croc. clip to separated main earth conductor first, then apply  insulated probe to L of incoming supply. Then test. No fingers needed near live parts.


    After test, remove insulated probe first, then earth croc. clip secondly.

    ...............................................................................................................

    Always connect the safest clip/probe first ( E or N) then the more dangerous one (L) afterwards for the test.


    Always disconnect the most dangerous connection (L) first and the safest one (E or N) last immediately after the test.


    Z.
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