How to splice 10mm² cables?

How to splice 10mm² cables? How to make correct insulation in 10mm² cable splices? This is the subject of this article and this process that we are going to show serves to splice cables with a section greater than 6mm², that is, this splice can be used for 10mm² cables, but it can also be used in larger cables like 16mm² or 25mm² by example.

Split bolt terminal, what is it?

A very common question is as to the correct way to splice larger section cables. To make this process as efficient and safe as possible, we will use a split bolt terminal. This terminal consists of a thread that has a slit in the center and a clamping nut. Usually, this terminal is made of bronze or aluminum and it guarantees an excellent mechanical tightening for the splice.

This type of splice is widely used in boxes between the meter and the installation of the house but can be used in any splice between two cables of large section, including in cases where it is necessary to splice rigid cables with flexible and cables of different sections, such as a 10mm² cable with a 16mm² cable.

10mm² cables, how to make splice?

Before continuing, let’s review some essential points. At the entrance to electrical installations, cables always have a larger section and on cables with a section greater than 6mm², terminals and connectors must be used for cable splicing. Never forget this when connecting the meter cables to the QDC input in the pass box.

Understood that, now we will explain how to make an amendment using this split bolt terminal! With the use of this connector, an extension splice or a splice can be made. The first step is to strip the cables, then you must open the terminal by completely removing the cable pressing nut, and then you must fit the cables in the terminal slot, as shown in the image below.

10mm cable splice insulation

See how to splice or extend in 10mm² cables

It is worth remembering that the choice between extension splice or branch splice is up to you, it depends a lot on the space you have available in the pass box. The next step is to fit the nut and tighten it using a hex wrench, as shown in the image below.10mm cable splice insulation

The correct way to tighten the 10mm² cable splice

The splice is a critical point, but with this type of connector, you can guarantee the proper mechanical tightening for the splice of the cables.

Splice of 10mm² cables, how to insulate?

Now we are on the right way to insulate this splicing of electrical cables, insulation is a fundamental part to ensure safety and smooth operation! In the example cited here in this article, as the splice was made in a box, there is the possibility of contact with water and moisture, so the use of a self-fusing tape is essential, always use this type of insulation when the splice exposed to the elements. See in the image below how the splice looks after the insulation with the self-fusing tape.

Example of 10mm² cable splice insulation with self-fusing tape

The last step is to finish the insulation with a good layer of electrical tape. In the process, the insulating tape must always be well stretched so that it completely adheres to the insulation layer. The main purpose of this layer of electrical tape is to protect the self-melting tape, therefore, the layer does not need to be as thick as in the case of insulation using only electrical tape. See in the image below how is the isolation of this amendment completely finished.

Example of complete insulation of 10mm² cable splice

With that, we finish one more article and if you have any questions, leave in the comments that we will be happy to answer. In the world of the electrical channel there is a complete video showing the realization of this amendment that we mentioned in this article, in addition to many other interesting videos, we invite everyone to get to know and subscribe and to increase their knowledge in the field of electrical more and more!