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Periodic Inspection and Testing

 

A full test on the supply of your home/business to BS7671 I.E.E. Wiring Regulations including fuse board, earthing arrangements, wiring, fixtures and fittings (i.e. lights, sockets, switches). Installation methods, loose connections etc.

 

The following tests are carried out:

 

Continuity of earth conductors

Continuity of ring final conductors

Polarity

Installation resistance – to check for any arking or moisture between phase – phase earth

Earth loop impedance – to verify path of earth

R.C.D. test to check tripping times and mA settings

 

The test involves testing circuits at the consumer unit and various points around the property and includes a visual inspection as well as an instrumental test.

 

The testers used are:

 

Voltage tester to measure Volts

Continuity tester to measure ohms

Insulation resistance to measure Meg Ohms

Earth loop impendence tester to measure ohms

R.C.D. tester to measure mS

 

Also the supplies characteristics are tested to ensure a good earth and path of fault current is present. These tests are called Ze and P.S.C. (Prospective Short Circuit)