im putting a new electric shower in my sisters bathroom. at present they have an electric shower in there with a pull switch with neon indicator but no extraction. in my house i have electric shower and extractor and a switch outside room with red switch that controls the shower and the extractor. i want to do the same for my sister.do away with the pull cord and have it the same as mine. the showers rating is staying the same and its moving into another corner closer to the pullcord. i just need to know how to do the wiring from the feed into the existing pullcord onwards. thanks