If L/N touch.. it is not the ELCB that trip.. is the MCCB that will trip and you will see a spark/burning sign on your cable.

frm here, i can see that it is most possible that is overloading and your MCB is tripping but not the ELCB..

assume that your 1st point of the circuit is to AC.. then you can loop the 5 pc from another socket.

wyekeong: your cable is in a conduit or flexible hose? if in a conduit.. pull it out, cut the short circuited area, join them back using cable link, then lay it back ..