Installing boilers has become a two trade installation with the Part P unless you are trained. The electrical conection from the boiler needs to come from a fused double pole isolator (spur). I have noticed that there are installations where the use of a plug is used direct into a unswitch shuttered socket outlet. I find this way is much better as the polarity and if there is a short can be tested easily with a multimeter. If the installation was from a spur then you would have to off the electrics of the house in that area and take the wire of the spur in the wall then test, VERY TIME CONSUMING but needs to be done !.
Some boilers state in there instruction manuals that unswitch shuttered socket outlet can be used.
I want to know if this method can be used for all Domestic boilers even if it doesn't say in the manufatures instructions as it does comply with Electrical regulations?
i am a registered installer