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Got back to the office today to hear of a strange problem some of our guy`s were called to...any idea`s? A house converted to two flat`s,one up,one down. Each flat has been given it`s own supply TNC-S and each flat has a consumer unit,metal clad with 100A 30mA main isolator. When the...

Hi guy`s and gals Due to a small kitchen im looking to put my washing machine into the detatched garage which is around 3 meters from the house (and the main water supply pipe). Im looking at tapping in and running pipe through the house wall and laying in a trench to the outbuilding but my...

Hi guys Im a domestic installer and know very little about industrial electrics but yesterday we had some machinery installed and wired in so last nite,as you do i was inspecting the installation and noticed... 3PH ...6mm Insulated single core phases with a 4mm neutral !!! Is this good...

If your ever caught short without your `BIG BROWN BIBLE BS7671`and need to know a Z`s figure use this simple formula..... For a type B MCB.... 1.Multiply the nominal setting of MCB by 5 Then using Ohms law... 2.Divide 240 (volts) by the sum you got in the above calculation. I.E for a 25...

Hi peeps.....today i heard a couple of arguments about the best way to locate a break in a ring final cpc....Which do you favour? Ill set the scene..... Your carrying out a continuity test on a ring final circuit,you have measured the end to end resistances of both the phase and neutral...

Hi peeps.... Just been reading about these tests and was wondering..... When measuring Ze we would carry this test out with the earth conductor temporarily disconnected from the MET, which will also count out any parallel earth paths and a false Ze reading. Add the Ze to our R1+R2`s of each...

Have any of you time served Sparks ever come across this? Went to a friends new house today and took a quick look at the system. TNC-S from underground to a 100A main fuse 16mm tails from main fuse to an old style meter 16mm tails from meter to a wylex 100A switch isolator From the meter...

Hi guys... Can anyone tell me are 12v light transformers susceptible to surges or volt drop? Was chatting to a friend at work today and he has just put two groups of 12v lights in his bed room but after a week one died and this morning the other one went south. Now he lives in a huge house...

Quick question.... As now were getting bits of the 17th edition regs flying out im wondering about this `NO supplementary BONDING REQUIRED IN BATHROOMS` Were now led to believe that instead of the bonding, we will have to ensure ALL circuits in the bathroom are protected by...

Grrrrrrrrrrr anyone recommend where i can get one from? :roll:

Hi guys....question..... Im having a wall in my kitchen moved in by 2 inches (it was a solid wall and is freezing cold and a company is putting up a metal frame and installing a thermal insulation under plaster boards) the cable to two of the sockets are to short and i need to extend them...

As the headline says really ....how do you earth your metal capping? Are there any special products out there to do this ?

Hey guys and gals... Just got back from a call where someones lights were playing up and when tracing the cable (in th`attic) from light to light i found someone (obviously the client denied about doing any DIY), had started from the C.U then wired rose to rose and at the last rose had gone...

Hi guys and gals :P The time is nearly there for me to register with one of the competent schemes....But which one is best? 1.BSI STANDARDS 2.ELECSA LTD 3.NAPIT or 4.NICEIC Oh and a quick one .... I have my EAL Domestic installers intermediate certificates... Do these...

Hi guys and gals Can anyone help me with a breakdown of how to use this formula? Im currently reading a scaddan book with it in and dont know how to apply the values. Thanks in advance.

Today i opened up the unswitched FCU for my cooker extractor and found a lenght of 1mm(twin&earth),running to a junction box feeding a 5ft fluoresent tube!!!!. The FCU in question is a spur from the kitchen ring. Is this kind of wiring not dangerous???? Hope what i ask makes sense.

When i switched my kettle on today the ceiling lights flickered! :cry: Any ideas?