BS 7671 Testing RCD’s - Regardless of the Type of RCD Test it as if it is an AC RCD at x1 ONLY Changes to BS 7671 under Amendment 2 of the 18th Edition of the Wiring Regulation requires RCD’s to only be tested on the AC setting regardless of the Type of RCD and at the rated residual operating current of the device. This simplifies the testing process so even if you have an A, B or F Type RCD you only need to test it on the AC setting of you MFT tester and at 1x its mA current rating with a maxim

How to Carryout the RCD Ramp Test - Why Does my RCD Keep Tripping What can you do when faced with an RCD that keeps tripping. In this video Marcus explains how to carryout an RCD ramp test. This test can prove if an RCD is oversensitive by showing the electrician the amount of earth leakage current in milliamps that it takes to trip the installed RCD. Marcus carries out the ramp test from the load side of the RCCB with the MCB's OFF therefore removing all the loads in circuit. Videos are trainin