All About RCDs (residual current devices)

RCD description An RCD ‘Residual Current Device’ is an electrical device that monitors the current flowing through either an individual circuit such as an RCBO ‘residual current operated circuit-breaker with integral overcurrent protection’ or multiple circuits within an installation using an RCCB ‘residual current operated circuit breaker without integral overcurrent protection’. Its purpose is to … Read more

Dead Testing Electrical Installations

Introduction… Initial Verification: Dead testing must be completed after your inspection and always before any live testing takes place. This is to ensure that all safety systems such as the main earthing, main bonding and all circuit protective conductors are in place and that there is no risk of any short circuits or earth faults … Read more

Insulation Resistance Testing

Remember this test can damage equipment and there is also a risk of electric shock from the d.c. voltage produced by your test instrument (usually 500v). We are testing to ensure that the insulation surrounding the conductors is adequate and that there are no short circuits between conductors. It can be done on a complete … Read more