The wire boxes are stapled together on all contact surfaces to form a continuous assembly. The careful stitching of the wire boxes is absolutely connected to the stability and strength of the whole project.

The diameter of the seam wire and its strength will be determined in the project study. It is not allowed to use suture wire with a diameter smaller than 2.20 mm. The type of corrosion protection of the seam wire will be the same as the grade of wire the junction box is made of.