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Checking Appliance Earthing.

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Today I spoke to the manager of a local chain of domestic appliance retail shops. The chain sells and installs appliances like cookers and ovens etc. I asked the manager if they carry out an earth fault loop impedance test to confirm adequate earthing of the supply circuits and good earthing of appliances like cookers. He said that they did not. He asked me what test gear is used to carry  out the tests. I was shocked by this. People are having appliances installed by unqualified installers and the earthing effectiveness is not being tested.


Also his shop has nuisance tripping of the R.C.D. when several appliances are turned on. In particular washing machines cause tripping. Probably down to the 50 appliances each leaking a small current to earth via their internal mains filters. Get the cheapest quote. That''ll do. That's Norfolk for you.



Z.


Z.
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    Question. The company's installers are to supply and wire up a new free standing cooker. They attend the customer's house and disconnect the old cooker and take it away. They connect up the new cooker in 6.0mm2 T&E cable to a cooker connection point. The cooker isolation switch (cooker control unit) does not have a 13 Amp socket incorporated in it. It is just a 45 Amp switch.


    Is the cooker correctly earthed? How would we test to confirm this?


    Z.
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  • 0
    Question. The company's installers are to supply and wire up a new free standing cooker. They attend the customer's house and disconnect the old cooker and take it away. They connect up the new cooker in 6.0mm2 T&E cable to a cooker connection point. The cooker isolation switch (cooker control unit) does not have a 13 Amp socket incorporated in it. It is just a 45 Amp switch.


    Is the cooker correctly earthed? How would we test to confirm this?


    Z.
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