Can I lay wire and get an electrician just to connect?

to answer your question you are not suppossed to do any wiring your self ,you need to speek to an electrician.but if the cable is going to be in conduit trunking where it can be seen you can wire it up ur self and the electrician need to test it . to change the fuse bord everry circuit need to be testedbefore it is energise and there is no warrenty on it but what you should get a further 5 years before you need to test your installation (a periodic report valid 5 years i hope this would answer your questions jimmy

Gem in reality what your asking for/proposing is to get an electrician to break the law! Under part P of the building regulations you can install the wiring as a DIYer if you so wish, but you must first pre-notify your local building control department and pay their fee. (normally around £200 - £300) Most registered electricians will not be interested in connecting and certifying the cable that you have installed, as its simply not legal for them to sign off work that has been done by someone else. The risk is if they are found to be doing this, they will be removed from the part P competent persons scheme they belong and possibly fined aswell. This said there are many less scrupulous installers out there that will only be too willing to take your money and sign it off or issue you with a fake/dodgy cert! - just be very careful as if it goes wrong its you as the householder that can get fined up to £5000. As the other poster has highlighted already you need to consider the kilowatt rating of the cooker and work out the voltage drop for the cable and apply any correction factors, e.g. if the cables are going up into the loft it maybe necessary to apply a "de-rating" factor as the cable will not be able to dissipate heat to the surrounding insulation as good as it could as if it was just in free air. The cables for both circuits will either need to be installed 50mm deep in the walls or installed in earthed metal conduit or RCD/RCBO protected in order to comply with BS7671:2008 requirements so any old conduit and installation method won't do. Its essential that the circuits are designed and installed correctly as if anything does go wrong in the future, you could end up finding your insurance company will not pay out! Personally its better to shop a round and get a few quotes from registered electricians its often cheaper than you think!

First of all you need to check the killowattage of the shower and cooker to ensure you are installing the correct cable (unless you have the correct documentation you cant do this), most electricians (including myself) like to install the cables, this is not to get extra work but to be satisfied that the installation of the cable complys to PartP and current regulations, in whole 1 person has installed the cabling from beginning to end and terminated/tested the install. Also an electrician can carryout a quick survey of the existing set up to see if consumer board can take the extra loading, has spare ways etc etc but please use a registered electrician they will tell you the short falls of what you are asking, a quote/advice is free please dont dive in head first, a good installation is all in the planning. and ensure you get a certificate at the end THIS IS ESSENTIAL! Any work in a shower/bathroom needs care full attention all registered companies are very tight on this.