2N 9152101W Installation Manual page 52

Grounding
We recommend to ground the intercom in order to improve the static electricity
resistance. For proper grounding you need a cable of the minimum cross-section of 4
mm2. Connect the cable to the connector in the bottom part of the intercom. The
connector is enclosed to the delivery.
2N TELEKOMUNIKACE a.s., www.2n.cz 52/85