Aastra OpenCom 510 User Guide - Page 25
Notes on Installing the OpenCom 510, Earthing and Potential
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Installation Safety Precautions Earthing and Potential For the purpose of potential equalisation, all conductive parts of the OpenCom 510 must be connected to the protective earth conductor (earth busbar of the building's wiring system) by means of a solid or stranded wire of at least 2,5 mm2 (yellow/green). ø 2,5 mm2 ø 2,5 mm2 OpenCom 510: Earthing arrangement The metal screens of the subscriber and trunk cables must be connected to the circuit common in the distributor or the patch field. The protective earth conductor of the 230 V mains cables is connected to the circuit common and the telephone earth line. All metal parts of the communications system are mechanically and thus electrically coupled in order to provide protection through the protective earth conductor and the telephone earth line. 4.1.4 Notes on Installing the OpenCom 510 Do not allow any fluid to enter the OpenCom 510 as this may cause electric shocks or short circuits. Do not install the OpenCom 510 during a thunderstorm. Do not connect or disconnect any cables during a thunderstorm. The OpenCom 510 is designed for indoor use only. Route the cables in such a way that they cannot be stepped on or tripped over. 23