switch wire

during the reno i have a switch which i want to replace but the one my son have purchased has l21 and l22 terminal with a common. The old one have common L1 and L2. could i just have a confirmation of where to connect where. the switch will be metal so would it need the box connected to the...

Hi All, I installed a new 3 way switch and intially had it working on all 3 switches after just doing a switch by switch cross over of the cables. I then snapped a screw in the backing box which meant draggging all the wires out. Although I tried to group them I have been unable to rewire...

Hi, First off, a great forum a great source of info. I have searched and read various threads but nothing helps in my situation, so I have posted this problem. I would really be grateful if someone can help me through this. First, everything is on old wiring, black and red, we also have an old...