09.09.14 , , ,
We often get questions about a correct method of connection of the grounding conductor with the ground electrode. Indeed, what must and can be used: bolt clamps or welding?
Let's compare these two methods!
Of course, the correct answer can only be given by the regulatory documents.
So, GOST R 50571.5.54-2011 / IEC 60364-5-54: 2002 states:
Additionally, p. 1.7.139 EIC 7th ed. clarifies that the use of welding is recommended for steel conductors (black steel without additional measures for corrosion protection)
It turns out that connection of a grounding conductor to the ground electrode can be carried out in both ways. However, such connections should be related with due attention. After all, attaching a clamp or using welding, one can damage the surface of the ground electrode, which is strictly prohibited.
This was stated in paragraph 2.2.13 "Instructions for assembly of grounding and potential equalization in electric installations" and 1.03-08 from 01.01.2013.:
Of course, it is much easier and faster to the set bolt clamp on the grounding electrode to weld a connection using a special device, which not everybody has. In addition, it is practically impossible to damage the surface of the grounding electrode with the bolt clamp.
To our mind, the choice of ways to connect the grounding conductor to the ground electrode is obvious. It is a bolt clamp, e.g. ZZ-005-064 clamp for D14 pins.
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