can u connect a 1.5mm with a 1.0mm in a jb i assume u can but it is bigger which is making these connections alot harder and fidgety. is it better to get a maintenance free junction box from screwfix and can all the wires fit into the jb, its four wires 1.0mm or 3 wires 1mm and one 1.5m?
(and no i didnt wire i just brought them down from the joists) and if someone can can you link the JB from screwfix if not all good

(and no i didnt wire i just brought them down from the joists) and if someone can can you link the JB from screwfix if not all good
