I'm installing a new dimmer switch and when I removed the old on/off switch, I found 3 white cables all tied together and 3 black cables. I know that the cables also connected to the light switch in the guest room. I just don't know what to do with my 2 black wires from my new dimmer switch, and...

I am renovating a bathroom and need to add an exhaust fan with a separate swich from the light. There are three wires coming into the switch box, red, black, and white. The red goes to one side of the switch. The black goes to a wire nut for an exiting light and another black comes from that...

I'm replacing a light switch That Controls on light socket in the room for a lamp with a dimmer switch my old switch had 2 black wires and a white but the new dimmer has a red black blue green the new lights have only black and white wires ? How do I make this light work with this switch ?

I'm installing a GE wall oven. I have red, white, black and copper wires coming from the oven and the same coming from the wall. Do I connect each color wire to each other or do I connect the copper wires and white wires together?

If I have white, red black and copper wires coming from the wall and the wall oven do I wire each wire separately each color to each color?