At the original switch straighten the ends of the cores from the existing two-core-and-earth cable with pliers.Secure the conduit in the chase with galvanised masonry nails.Feed both cables through the hole in the top of the mounting box, ensuring there is enough cable for the cores to reach the switch face-plate.Then feed the three-core-and-earth cable into the conduit. First feed the original two-core cable into the conduit.Cut another length of oval conduit that corresponds to the distance between the top of the mounting box and the ceiling.The original cable can now be pulled from the mounting box and out of the widened chase.The three-core-and earth cable can now be fed from the location of the new switch to the existing one.Secure the conduit in position by driving a number of galvanised nails into the masonry on either side of it.At the location of the new switch, feed the three-core-and-earth cable into a protective oval conduit cut to the length that corresponds to the measurement from the top of the mounting box to the ceiling.Carefully widen the chase running from the existing switch to the ceiling ensuring you don’t damage the cable.With a cable detector locate the position of the two-core-earth cable in the wall that runs to the existing switch.Then through the ceiling, along the space above the ceiling to a position directly above the existing switch. The chase should run from the housing up the wall. Following the instructions in the project Preparing a cable route cut a housing for the new mounting box and a chase in the wall for the cable.Plan your cable route from the location of the new switch to the existing one.Disconnect the cores from the terminals on the face-plate and the earth core from its terminal in the mounting box. If the cable does not have an earth core then you must only use plastic switches and mounting boxes.However, it is important to remember that since March 2006 the colour codes of cable cores have changed and you must be aware of this when connecting pre-2006 cores to terminal with cable purchased since the new colour codes came into effect. The existing switch will be connected to two-core-and-earth cable.Unscrew and carefully remove the face-plate of the existing switch from its mounting box. Alternatively, remove the appropriate fuse for the circuit or switch off the MCB at the consumer unit. Cut a housing for the new mounting box and a chase in the wall for the cable.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |