Current measurement techniques
Residual, Net and phase balance current measurement techniques appear to be one of the industry's best kept secrets. These techniques are not often taught in colleges or defined in guidance notes. Current measurement in general are commonly ignored or under-rated by standards and guidance. However, these techniques are vital for diagnosing many faults in installations.
In our view, current measurement should form part of standard dead testing procedures. Particularly where diverted neutral currents may exist in protective conductors. Our guide for basic current measurement techniques is free to download here.