With the power coming to the switch and then going to the lights you will notice that there are two black wires two white wires and two ground wires bare wires. Bring old light fixtures wired with knob and tube wiring up to code by installing an electrical box in the plaster wall.

How To Hang A Ceiling Light Fixture Family Handyman
Wiring a light fitting and switch. If the power goes from the switch to the light then turning off the switch will cut power and make it safe. If the light switch has a ground screw on it usually green and at the bottom of the switch connect it now. The source is at the switch and 2 wire cable runs from there to the light. Here a single pole switch controls the power to a light fixture. Wiring a light switch for a ceiling light including wiring the ceiling rose. Heres how to do it without breaking the plaster and lath.
The source hot wire is connected to a switch terminal and the other terminal is connected to the black cable wire. This project is sponsored by quickwire. Part 2 of 3. If the power runs to the light then the switch there will still be a live wire in. A simple lighting circuit is where the light switch is installed between the supply and the light fitting. First of all we should connect the ground wires to the box.
Installing your new light. A common place to find in line switches can be in an attic in a garage or a shed. Wiring a single pole light switch. Once you have released the light from its wiring you can set the existing light fixture aside. The switch wires are added as shown in the ceiling rose diagram above and connected to the switch also as shown. Probe the existing hole with a keyhole saw to find the horizontal edges of the lath.
Wire a light switch in one way lighting circuits. The neutral wire from the source is spliced to the white. The light fitting is then connected also as shown. Fix old house wiring problems. All connections must be made before the final connection to. Assuming it is a steel box.