Trying to wire a Fibaro dimmer into this light switch but not having much luck. There appears to be 2 permanent lives coming into the COM port and the presumed switched live out of L1 port. I can't find anything on Internet for why 2 permanent lives should be there. I can't wire both these lives into L terminal of the dimmer as it can't fit 2 cables. This is not a two way switch- it's just one switch for 3 lights. Thanks Andy
Use a 3-way wire connector of the type customary in your area to attach a pigtail (short piece of wire of the same gauge as the rest) to the two existing hot (live) wires, and then hook the pigtail up to the dimmer's common input.
Michael Karas' explanation is the most likely one, by the way -- it looks like whoever installed this switch was being a bit hackish or didn't have the extra wire connector and pigtail at hand, so they simply twisted the two wires together and stuffed them into the backstab common terminal on the switch.