What is the purpose of leaving two steel bars in the place where the lantern is installed behind the

There are two live wires left at the terminal of the living room, one should be the power live wire, and the other is the live wire connected to the lamp. A neutral wire is connected to the neutral wire on this lighted switch socket.

According to the length of the balcony and the two steel bars provided, whether the reinforced concrete balcony is suspended or the reinforced concrete ring beam at the edge of the balcony, only two steel bars can not meet the structural structure and strength requirements. If the balcony is cantilevered beams, then the cantilever beams should be arranged with at least 4 main reinforcements of 20 or 22.

First of all, it depends on whether you switch the power supply to your ceiling, if not, then there is no main power supply on your ceiling, and then the details are all the lights and exhaust fans on your ceiling are controlled by your switch. Then if you want to connect an outlet, you can only connect it in parallel with your lamp or exhaust fan, so there is a problem, when you turn on the light or exhaust fan, your socket can only supply power. Hope it helps!

This wiring is barely usable, but it is unreasonable and unsafe. Because one of the two wires on the lamp is the control line and the other is the neutral line, the connection becomes a series connection method. You must know that all the electricity in the home is connected in parallel. >>>More

This question you raised depends on the actual situation, for the light line to be accurate should be two control lines, one is the incoming line is what you said about the live line, one is the circuit is the zero line you said, generally requires the construction of the car brigade bucket wiring color separation, but some personnel drawings are convenient not to separate colors. Of course, there are other reasons, is there a town and air street lights on the ceiling! So if you want to understand clearly, it's better to let the electrician explain it to you on the spot.