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Hope some one can help with this one, strictly not a DIY job, but I have been asked at work to measure a 8 Khz, 650 Volt RMS AC voltage to a accuracy of plus or minus 5 volts. Tried several good quality digital meters but they don't appear to respond accurately to AC of that frequency. Did...

Are the socket back boxes from the different makes of Dado Rail Trunking, compatible and interchangeable ?

I have a 2004 Kia Rio 1400 cc, I am told they were fitted with a Mazda Engine, doe any one know what Model Mazda the Engine originated from. Its a single overhead cam 8 valve lump. Any info much appreciated.

A 240 volt electric motor fitted to a machine of American origin, has four connecting wires including the Earth connection, the others are, a red marked L2, a Black marked L1 and a white marked N, could one assume that this is a two phase motor ?

Thanks John, I was beginning to think every thing I learnt in the 70`s was wrong.

OK, I pressed the wrong button, 240v. So what you are stating is that the USA 240V supply is not, as I had previously been informed a two phase supply, but a 120v-0-120v, with both 120`s being in phase, and any 240v appliance or load is connected between. Hence, the need for the start cap. That...

I understand about the 220v 2 phase USA system, however I thought as there is a phase shift in the two supply phases it would not need the cap, but I think what you saying is, as the phase difference would be 180 deg, it then needs a start cap. Incidentally, the Motor has 3 connections...

I have been repairing a machine of American origin that uses a 240v two phase motor. Never knowingly worked on any thing with a two phase motor before, and after reading up, on the principle basically understand it, but this particular example had a 15uF start cap in series with one winding...

Got trouble with a 2000 VW Polo drivers door lock, just wont lock or unlock, cant even press down the door lock lever inside, I have seen refurb kits on ebay for a few quid, how much of a job is it, am I better getting another lock and key from a breakers yard . Any advice appreciated.

I think you may well be be on the right track, it is a old instal. I will go back and have a better look, two earth connections seems familiar. Thanks, really appreciated.

A neighbour of mine has a workshop attached to his Bungalow that contains a Milling machine. This are powered from a single to 3 phase rotary inverter. The Bungalow is feed by a TT system with the normal 100mA RCD next to the CU thats fitted with cartridge fuses. The workshop has its own CU...

I have been let down by a couple of mechanics to replace the head gasket on my 2003 sportage 2L petrol Kia. Now thinking of having a go myself, I have done a few head gaskets in the past, last one was on a twin cam Rover K series 11 years ago, and I would not want to do another. Their is no...

Thanks very much, the reply was most helpful, the latest one was the Glass type, nothings easy or meant to be to repaired these days is it ? I bet the motor`s not cheap either. Thanks again.

On several occasions, I have been asked to look at Lamona cooker hoods, all got the same fault, lights ok but the fan motor is not running. The switch appears ok, alough through fault finding is tricky due to units being fixed to the wall, but all clues suggest a o/c neutral to the Motor, has...

I need to concrete a area slightly less the 4 sq meters, to a depth of about 75mm, I belive it works out about 0.3 cu mtrs of mixed concrete. For reasons of logistics it is easier if I buy the ballast in in 25Kg bags, how many bags would I need ? Thanks

Re. AC Cert Apprenticeship compleat Cert, must be the same as my Indentures?

Perhaps he did meant AM2 Cert, should I already have one then ? as well as the old ONC, C&G part 3, 17th and 2391. Never been asked before ? I thought AM2 was for Electricians with Foreign qualifications, wanting to work in the UK Cant be bothered with it now now, I am 62.

The Estates Manager I spoke to, said its related to JIB membership ?

Has any one herd of a electrical qualification called a, A T Certificate ? The reason being, is I applied for a Maint sparks job in a NHS Hospital, and was not even considered because I had no, A T Certificate ? Got all the other papers 17th, 2391 etc Ive never herd of it, so I phoned a couple...