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Little tricks in electrical engineering

It is easiest to make a self-made carrying lamp from a glass jar with a screw cap, by making a hole in the cap for the bulb holder, also by installing a wire bracket for the suspension.

Having laid the PVC insulation tape on the room for the connection of the electric wires, iron the last turn with a heated soldering iron. The coils of the tape will fuse, the strength will additionally increase the durability of the connection.

Sandpaper, glued to the plate, will help to clean the tip of the soldering iron from the deposits of scale and soot. Only pieces of tin put on the skin and also rosins will help at the same time to cheat the stinger of the burner.

To remove the lacquer coating from the surface of the thin wire (with a diameter of 0.2 mm is also smaller), you can use a soldering iron: put the wire on a wooden stand and run it over the hot tip of the soldering iron several times. Under the effect of high temperature varnish immediately descend from the surface of the wire.

Enter the wire into the apartment through the channel of the pipe or metal sleeve is not so easy. To solve this problem is allowed to use a vacuum cleaner. A paper ball with a thread is inserted into the metal hose and is also vacuumed with a vacuum cleaner until it appears from the other side. After that, it remains to tie the wire to the thread and drag it.

The electric wire is drawn into the protective metal casing-tube with fiber, which, in turn, is passed through the casing, tied to a weight. However, if the casing has several knees, this will not succeed: because of the friction of the fiber on the pipe wall, the weight can get stuck. In this case, wind the fiber on the metal bobbin from the sewing machine and also run it into the tube. The bobbin will roll in, unwinding the thread.