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Little tricks in electrical engineering
Homemade lamp-carrying is easiest to make from a glass jar with a screw cap, having made a hole for the bulb holder in the cover, also installing a wire brace for suspension.
After applying the PVC insulation tape to the electrical wiring connection, iron the last turn with a heated soldering iron. The turns of the tape will fuse, the strength of the additional longevity of the connection will increase significantly.
Sandpaper, pasted on a plaque, will help to clean the soldering tip of the soldering iron from the scale deposits also of the deposit. Only pieces of tin that are put on the skin and also rosin can help to irradiate the sting of the finger simultaneously.
To remove the lacquer coating from the surface of a thin wire (diameter is also 0.2 mm smaller), you can use a soldering iron: lay the wire on a wooden stand, several times draw it over the hot tip of the soldering iron. Under the action of high temperature, the varnish will immediately come off the surface of the wire.
To introduce a wire into an apartment through a channel from a pipe or a metal sleeve is not so easy. To solve this problem, you can use a vacuum cleaner. A paper ball with a thread is put into the metal hose and it is also blown by a vacuum cleaner until until it appears on the other side. Later, it remains to bind the wire to the thread and also drag it.
In the protective metal casing-pipe, the electrical wire is dragged by a fiber, which, in turn, is passed through the casing, tied to a weigher. However, if the casing has several knees, this can not be done: due to the friction of the fiber against the wall of the pipe, the weight can become stuck. In this case, wrap the fiber on a metal bobbin from the sewing machine and also run it into the pipe. The bobbin will roll inside, unwinding the thread.