To monitor power consumption a digital ammeter can be fitted so decision making can be done and avoidance of perhaps costly and embarrassing circuit failure ensue. The fitting of miniature circuit breakers (MCBs) and residual current devices (RCDs) and the combination of both (RCBOs) can be locally built in the PDU should that be useful, particularly if the sub distribution board is in a largely inaccessible or inconvenient position.
Remote monitored units are also available to view via the internet the current, voltage, kW hours and power factor. Upper and lower limit controls can be adjusted with audible alarms from the units should these be breached.