Part ‘P’ of the building regulations applies exclusively to domestic dwellings. Click on the ‘regulations’ link above for more details about what is and is not notifiable.
All work should also conform to the latest IET wiring regulations which are currently the 17th Edition 2008. There are other regulations applicable to domestic installations these include Part ‘B’ which states that there should be at least one mains powered smoke or heat alarm per floor and these should be linked so one detector will set the next off.
All these regulations are there to ensure your safety. It obviously makes sense to have RCD protection, protective conductors, cables run in safe areas and rated correctly to the load and protective device. If you were selecting a new car you would probably check it’s Ncap rating, how it survives a crash. Well you should take the same care when selecting an electrical contractor. Is my installation going to be safe and if I do something silly like stick a knife in the toaster to get the stuck bread out, will I get a shock? You may think it will not happen to you, well my son did the toaster thing and because we had an RCD he did not get a shock!
Did you know that your domestic wiring should be inspected and tested every 10 years?
A dwelling should have it’s electrical installation checked whenever there is a change of occupier.
A complete test and inspection of an average domestic installation takes around 1 day to complete. At the end of the inspection you are given a certificate which will outline exactly the condition of the installation and inform you of any improvements required. This is an extremely useful thing to have if you are thinking of moving house.
The regulations state that anyone completeing an inspection and test of an installation should be ‘competent’.
Holders of the C&G2391 certificate have completed a 5 day course with a practical and written exam. What better way to prove competence!
All test meters have to be calibrated once a year to check accuracy.
Residual Current Devices come in many flavours but basically all do the same job. They detect electricity leakages, they do this by comparing what travels out through the live wire to what comes back through the neutral wire. They have a rating, 30mA is the most common. If they detect a 30milliAmp difference in what is going out to what is coming back they trip. Now it just so happens that 30mA is deemed as a ‘safe’ amount of electricity to flow through the body for 0.4 of a second. So RCD’s have to trip in that time or less. When one is installed it should be tested to ensure this is so. The test button provided on the device does not do this! It just checks that the mechanics of the switch are working correctly. The time and trip current has to be tested with a special meter.
Please contact me on
07799 767036 or
mick@mc-