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run an auto test on a meter
check the trip times are satis.
do a ramp test. If the reading is much below 18, suspect a faulty RCD. BUT you MUST test the rcd in isolation, because if there is fault current existing in the circuit, this will affect the reading.
check the trip times are satis.
do a ramp test. If the reading is much below 18, suspect a faulty RCD. BUT you MUST test the rcd in isolation, because if there is fault current existing in the circuit, this will affect the reading.
