Hi guts 1am and im just in from work, the worst house (nursery) ive ever tested
the building is around 130 years old and got rewired 19 years ago, every 2nd socket i take off theres and extra 2.5 or 1.5 cable dipped into the socket or sometimes both lol, 16amp breaker with a 2.5 cable coming from it marked up stairs lights- turns out its feeding 64 lights (30% lv downlights) but every light fitting and switch is wired in 1mm and i cant find where it is fused down anywhere, was doing continuity on one of the ring circuits and i got L- .32 N- .30 CPC-.49, do my figure of 8 and start to go round the sockets most are around the .20 ohms mark with mabye a few jumping up to 0.3 then i get to a socket which is 1.36 ohms- open it up and it has 2x 2.5 (ring) an extra 2.5 and 2x 1mm cables coming for it... its an absaloute shambles. another socket circuit has 3 cables in breaker (2.5mm 32a) marked staff room sockets, all 3 cables have continuity to each other, turns out it fed staff room skts, utility room sockets,lights boiler & it supplies a light and socket to a small room outside. measured my Zs in the staff room was round about .4 to .5 but then when i test Zs in utility room i get a mammoth 58.2 ohms, there are literally joints and cables evrywhere in this room, same high readings for outside room????????????
last problem was when i was doing my IR testing, dont know if i been an idiot right now but i cant think straight on it, i have four lighting circuits including the 16a protected one and all 4 are failing my L-E 500v test @ 0.01 megaohms, the power is off, even diconnected earth from PME to see if that worked, fought it might be the circuits with lv downlights, cant physically access the transformer as i think its a large transformer doing multiple lights and we couldnt find it, so anyways disconncted the lv circuits but still FAULT, lamps are still in but that only effects L-N correct? any ideas am i missing something obvious just cant think of anything at the moment perhaps because i am shattered lol,,, off to bed will read comments in morning, thanks in advance