Amendment 2 now insists that an RCD must be provided where children or disabled persons are present, regardless of whether a risk assessment has been done. Additional earth electrodes Some new wording has been added to Regulation 411.4.2 recommending that an additional connection to earth, by means of an electrode, is provided to PME earthing.. 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 o.

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Reply to rcd times at x1 and times x5 in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net.. 18th edition RCD max disconnection times!!. , As we all know the new 18th certs only have the facility to record the x1 trip time of a circuits RCD in the test results page. spud1; Jan 18, 2019; UK Electrical Forum.. All RCCBs subjected to 50Hz AC residual current are designed to trip between 0.5-1I∆n. Type A,F,B: Pulsed residual current (50Hz), the tripping threshold changes to 0.35-1.4I∆n. Type A & F: Trip threshold is influenced by the smooth DC content (offset value) e.g. Type A must still trip with < 6mA smooth DC superimposed on the pulsed waveform.