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Explanation: equipotential bonding system = Potenzialausgleichssystem
This is at least how the related standard DIN EN 50310 was translated. To verify this, go to the English version of Beuth Verlag (the German standards publisher) at http://www.beuth.de/index_en.php and search for "DIN EN 50310".
Steffen Walter Germany Local time: 17:09 Native speaker of: German PRO pts in category: 127