I am having a new garage door fitted with an electric opener. As part of the electrical install is to fit at my request a garage CU to replace an old junction box with a more professional solution. The cables in the picture come through the wall from the main CU - modern with RCD etc. The large cable is for a shower and not to be disturbed. The line into the junction box is for power in the garage split 3 ways to 3 separate sockets. [/img] The lighting circuit is separate and fed through the Kitchen. After the garage CU is installed and part P signed off I intend to run the cabling through conduit rather than just clipped to the joist. Is running through conduit minor work i.e. does not require signing off as well? Basic question is, am I over engineering this? Would a better junction box be just as adequate with conduit?