Hi all .. Just a quick question to make sure its ok to do.. I have a large decking at bottom of garden with a wooden shed also sits on it.. I want to put a tall lamp onto the decking and feed a 1.5 flex from a three pin plug into a socket with a 3amp fuse in the plug. The flex with run down inside the shed under the decking and along under till up into the lamp..just want to know if this ok to do or has it got to be done with swa cable..the flex will be hidden under the decking..many thanks