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Ok not been on for a while kept saying password was wrong, so here you go help me out with this. 2 c/u, each has its own RCD 30 mA, connected to one supply at the origin system is TT. Today on several occaisions the RCD's have tripped and some times both together at the same time. The system...

OK guys need some advice. Scenario 400 Amp 3 Phase head supplying 3 Phase isolator, Supplying a 3 Phase buzz bar. All this is connected with 150mm Cable so no problems here, The issue is there is a 24 way 3 phase consumer unit connected directly to the buzz bar with 25mm Tails, Does the...

OK I am in the proses of first fixing my lounge and will be hanging the TV on the wall with the SKY, DVD and cinema sound within a cabinet, all I want to know is what cabling I need from the cabinet to the TV ie. HD,Skart coaxial thanks CJS

OK we have wired a house to have 230 volt LED lights but the owner has now changed her mind as she doesn't like the light output, she has now seen some ELV lights she likes, but the only way it can be done is to put 1 transformer for more than 1 light. So can find out volt drop from the BRB for...

We had a call from a person this week to go sort his electrics out, he was fitting a new kitchen and was just pulling a socket away from the wall when there was a flash and then nothing, until he could here hising from behind him where the water supply was. Turned round to see flexible conection...

Son came home from school today said they had (I mean should have had) a wind turbine installed today :o . View album Pictures Here .

Hi my dog has taken a chunk out of his pad on his paw is there anything i can put on it thanks CJS :(

Ok last Saturday we had to install a new supply to a large freezer in a food processing factory, so 10mm 5 core SWA from a Sub board to control panel all tested out fine and left isolated for refrigeration engineers to finish of their installation. Got called back today as LED's on panel were...

Ok people can you help me out? Constant current driver's you wire the LED's in series, Constant voltage are wired in paralel. Now I know that if you wire Constant current in paralel the LED's work (as long as thats how the LED's are supposed to be wired) will this damage the driver? Why do...

Hi guys had a brain wave today, been looking at the clip gadget that fluke make to zero the plug top lead on their meters. I have made one. All you need is the protective cover you get on the plug top on most new electrical appliances, the one that covers the pins on the plug top. Drill a whole...

Ok filling in a NICEIC installation certificate today and was wondering what the rest of you put in the column maximum Zs permitted by 7671. For a TN system distribution is 5 seconds disconnection time you can get maximum Zs from the big red book, but for TT it is 1 second but there is no...

Hi I am currently rewiring a premises that has a Hydro Generator as well as a DNO supply , it is connected to the DNO service so when it generates more electricity than is being used it supplies the grid. My question is at the moment the system is TT, do to the fact I have installed SWA cables...

Hi quick question client is having a phone line with a dedicated broadband connection. He is not 100% sure how it will be supplied but seems to think that BT are putting a filter at the incoming line splitting it into 2 lines. Has anybody connected this supply before? if so do they connect in...

Hi quick question I know that if you run cables in a metal frame stud work wall it requires bonding, but what about metal framed suspended ceiling does this require bonding thanks CJS

Hi I have been asked to install some Ethernet connection point while doing a house rewire. Want to know do you have to run each connection point back to where the broadband connection is or can i wire the points in series thanks CJS

Exam tomorrow night 6.30 who is doing it, good luck to anybody that is, and I hope you pass CJS :)

Ok apache heres a question for you I have a dog he is a cross breed terrier. If a ***** comes into season and he can smell her, he just stops eating to an extent that a couple of times now he has collapsed with lack of sugar in his blood (know this because a local vet took blood sample and...

Had to do installation test today and used a 17th. Edition Installation Certificate nearly the same as the old ones but on the schedule of tests there now is a box to tick verifying that you have checked volt drop CJS

Not a joke but well worth a look ?:| http://www.learnenglish.org.uk/games/magic-gopher-central.swf

Have been testing a factory, 2 DB fed from a TPN supply via an isolator up till today all circuit on the 2 boards have been OK. But today lost the Zs on the Grey phase on both boards but still had 230/400 volts,Zs OK on Brown and Black. DB boards mounted on a freezer type of wall with a door...