What is the RCD in a fuse box? | AnswersDrive Residual Current Devices (RCD) these are switches that trip a circuit under dangerous conditions, and instantly disconnect the electricity. C) Circuit Breakers4,3/5(3) Resetting your residual current device (RCD) on your Click to view on Bing3:56No cable box required. Resetting your residual current device (RCD) on your consumer unit (Fuse Board) Overcurrent & RCD Protection plus IsolationAuthor: PhaselineElectricalViews: 147K Installing MCB in consumer unit. Replacing fuse in fuse How to Connect up a 10 Way Wylex Dual RCD Consumers Unit (Fuse Box) By Luke Wichard - Duration: 58:01. GSH Electrical 65,696 viewsAuthor: How2D2Views: 130KVideo Duration: 4 min Electrical RCDs – Find, Reset & Investigate Tripping RCDs Electrical RCDs – Find, Reset & Investigate Tripping RCDs. This web page describes how to investigate an electrical RCD that will not reset (constantly tripping). One RCD has tripped in fusebox | DIYnot Forums wwwot›Forums›How to..›Electrics UKHi, Fuse box is 3 years old, it has 2 rcd's and one has tripped. We have checked the fuses in the wall sockets and all ok. Is it possible to take out..