Personal Residual Current Device - Safety PRCD-S is a mobile safety device for all building and installation sites aligned to regulation and the accident prevention regulations of the fire brigades PRCD-S allows the absolutely safe connection to existing socket outlets PRCD-S checks the correct socket outlet function, especially protective earth, and allows an activation of the load only in case of safe socket outlet PRCD-S operates also as additional, mobile RCD PRCD-S is the only mobile safety device that fullfils the regulations of the Employers Liability Insurance Association an the for the safe power connection PRCD-S is simply plugged between socket and electrical appliance like an extension cord