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hi, couple of questions i have regarding a PIR our firm had done if anyone would be so kind, 1, the Inspector has the IR tests all as above 200M ohm, thats about 300 circuits and not one below 200 (in a 30 year old factory). also he's only done phase-earth (has others as LIM) tests but i no...

just in the process of having a new CU in the house and also some new circuits. the work is been done by contracters on behalf of the council i believe. should i get an electrical installation certificate. asked the guy who's doing it and he avoided the question a bit. is it actually a reg...

hi, i know this is a bit general but my fridge has stopped getting cold. i dont really know anyone who knows anything about them. can anybody suggest a reason why its not getting cold anymore. does it sound like a common problem? thanks

it was on a 3 phase board not a lighting circuit. just wondered if there was any danger or reason for the noise?

im an apprentice electrician and was doing some loop testing and some fault current testing yesterday. when doing this testing where my probes were on the circuit there was a crack/pop noise at the end of the test(just before i got the reading). the electrician didnt know what it was when...

cheers spark. got a megger mft1502, believe it can do the 400v tests but ill check of course. does that mean i can not bother with any of the 6 tests and just do l1-l2,l1-l3,l2-l3 then because one of these will be the highest?

and can anyone confirm the proceedrure is measure L1-E,L2-E,L3-E and record the highest value as ze???? and for fault current L1-E,L2-E,L3-E and then L1-N,L2,-N,L3-N . whichever reading out of the 6 gives the highest value is doubled and recorded. is this correct or have i missed...

in regards to the 2391 practical..... 1, for the external earth fault loop impedance, do you disconnect the earth coming into the 3 phase db from the main earth terminal? have heard conflicting methods of this, some saying yes because of the pp's and some saying no because its a test...

hi, got a question about my upcoming 2391 practical. one of the tests is an earth fault loop impedance test where you have a socket mounted on a block off wood( to plug your tester in) along with 3 switches. the socket plugs into a 230v socket(via a flex cable and 3 pin plug) to get...

hi on the 2391 practical when doind the first test, continuity of circuit protective conductors can i take out the phase conductor for the circuit under test and put it into the earth bar thus getting the R1+R2 aswell to save time? main question though is do i have to disconnect any other...

sorry to be pain people but got a few more questions if thats ok help so far is much appreciated. 1,is it allowable to measure R1 and R2 individually using long lead method and then mentally add them up to get R1+ R2? (long lead method being easy cos its a test board. 2,how do i get...

sorry another question. are you allowed to remove wires? ive heard conflicting views on this. my way of testing the R1+R2 would be to take the phase out of the cb and terminate it in the earth, therefore being able to measure at the outlet. any views on this? or being its a test board can i...

thanks RF thats a great help cheers. ill have to look into the loop tester thing i think, potential banana skin! also 1, is it accseptable when testing I.R to open all cb's ( having taken precautions of removeng neons, dimmers etc) to test the whole board and circuits as one rather than...

got my 2391 practical next week guys and got some queries on a few things? 1, in the assesment is it acseptable to measure the R2 values to the (earthed) screws on the switches instead of taking the fronts off? this is assuming you dont have to do the R1+R2 measurment (which our tutor told us...