Grounding and Surge Protection

The device must be permanently earthed to a stable local earth reference.

Grounding and Power Surge Protection:

● The device must be installed only in telecommunication sites / centers in compliance with ETS 300-253 requirements "Earthing and Bonding of Telecommunication Equipment in Telecommunication Centers".
● Prior to installation, earth loop impedance test must be performed by a certified electrician to ensure grounding suitability at the power outlet intended to feed the unit. It is essential that the impedance will be kept below 0.5 ohms!
● Proper grounding is crucial to ensure the effectiveness of the lightning protection, connect the device permanently to ground (as described in the procedure below). The device's grounding screw must be connected to the equipotential grounding bus bar located in the Telecommunication rack or installation site, using a wire of 6 mm2 surface wire. If the device is installed in a rack with other equipment, the rack must be connected to the equipotential grounding bus bar of the Telecommunication room, using a stranded cable with surface area of 25 mm2. The length of this cable must be as short as possible (no longer than 3 meters).

Protective Earthing:

● The equipment is classified as Class I EN 62368-1 and UL 62368-1 and must be earthed at all times (using an equipment-earthing conductor).
● Finland: "Laite on liltettava suojamaadoituskoskettimilla varustettuun pistorasiaan."
● Norway: "Apparatet rna tilkoples jordet stikkontakt."
● Sweden: "Apparaten skall anslutas till jordat uttag."
➢ To connect the chassis to an earth ground:
1. Prepare an adequate length (approx. 12 mm or 0.5 in.) of stranded grounding wire (8 AWG minimum size) for the ground connection.
2. Insert the stranded end of the grounding wire into the grounding lug (supplied), and then use a crimping tool (not supplied) to secure the wire to the grounding lug.

3. Attach the grounding lug to the chassis, as shown in the following figure, making sure that the spring washer is located between the screw head and the lug.

Attaching Grounding Lug to Chassis

4. Connect the other end of the grounding wire to the building's protective earth. This should be in accordance with the regulations enforced in the country in which the device is being installed.