Wiring diagram without junction boxes
Case of life
I personally had a case, everything was discussed with the client, the number of points (sockets, switches, lamps, junction boxes), their location, the nuances of the subsequent wiring installation. They shook hands, an estimate was drawn up and material for installation was purchased. According to the plan made by joint efforts, the wiring was made. And then one day, when everything seems to be nearing the end, the drywall is screwed on and the painters puttied, and I install the transfer cases and installation glasses, before tomorrow’s installation of the fittings, an employer appears and dazzles me with my idea: - “I want to bed arch backlit. How can I do that?".
Well, the builders immediately agreed, they do the arch day work. This idea did not greatly inspire me, because on the wall to which the arch is attached, there are only two sockets for connecting a charger and a floor lamp. It was not possible to pull the wire to the junction box in the opposite corner. Moreover, to do this without damaging a couple of square meters of drywall would be difficult.
That is why it was necessary to fence the garden, take food from the outlet, make an exception in a box with a switch and continue to illuminate the arch. This installation option is called wiring without a junction box. Below are the connection diagrams for the two-key switch and two light sources.
The video below shows a good example of wiring without soldering in an apartment:
The advantage of wiring without junction boxes is the clarity and ease of installation, subject to accepted safety rules, which state that any electrical contacts or connections should be easily accessible for maintenance, monitoring and repair. As we know, the contact point, in any wiring design, is a weak point.
Often on forums and sites there is a debate about the possibility of wiring without distribution boxes and a complete rejection of these electrical products. For his part, as the author of this article, I am against "simplified wiring"Because the norms PUE were suffered and proved experimentally in their appropriateness.
A separate junction box, located in a place agreed upon by the rules, simplifies its subsequent detection by another master, as well as troubleshooting wiring.
Posting without junction boxes (below in the photo) has the right to exist only in isolated cases, and fully wiring in this form is not permissible. In addition, this type of installation is very wasteful, it spends between 30% - 40% more wire, compared with the classic installation.
Therefore, refuse this type of wiring, because it is simpler for the contractor and has nothing to do with safety in operation. Take care of yourself and loved ones. This, in fact, is all that I wanted to tell you about wiring installation without junction boxes. I hope the provided diagrams and video example were useful for you!
Another useful video on the topic at last:
Surely you do not know: