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Zs readings over limits
Former Community Member
Doing an EICR in a block of flats and quite a few of the lighting circuits have excessive Zs readings. All the circuits are on 60898 C10's without RCD protection with readings in the late 2 early 3 ohm range (max permitted 2.19). I know test result fails are generally a code 2 but these are LED panel downlighters with mostly class 2 drivers connected via choc boxes above the suspended ceiling so nothing really accessible. They would all comply with a C6 btw. Just wondered if you'd C2 this resulting in an unsatisfactory EICR
Alan, of course you are right, under fault conditions ADS has to work to prevent anyone getting an electric shock but what would you code a standard class 2 lighting pendent that had no earth connected? there are no exposed conductive parts on the circuit to get a shock from, the Zs test was made on the unterminated cpc of the T&E cable at the end of the circuit. Suppose the issue would be someone cutting or damaging the cable.
Alan, of course you are right, under fault conditions ADS has to work to prevent anyone getting an electric shock but what would you code a standard class 2 lighting pendent that had no earth connected? there are no exposed conductive parts on the circuit to get a shock from, the Zs test was made on the unterminated cpc of the T&E cable at the end of the circuit. Suppose the issue would be someone cutting or damaging the cable.
