Cabling The Device; Grounding And Surge Protection - AudioCodes Mediant 800 MSBR Hardware Installation Manual

Hardware Installation Manual
5

Cabling the Device

This section describes the cabling of the device.
5.1

Grounding and Surge Protection

The device must be connected to earth (grounded) using an equipment-earthing conductor.
The equipment is classified as Class I EN 62368-1 and UL 62368-1 and must be
earthed at all times.
For Finland: "Laite on liltettava suojamaadoituskoskettimilla varustettuun
pistorasiaan."
For Norway: "Apparatet rna tilkoples jordet stikkontakt."
For Sweden: "Apparaten skall anslutas till jordat uttag."
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 mm
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 mm
as short as possible (no longer than 3 meters).
The device does not include primary telecom protection! When the FXO / DSL
•
telephone lines are routed outside the building, additional protection - usually a
350V three-electrode Gas Discharge Tube (GDT) as described in ITU-T K.44 - must
be provided at the entry point of the telecom wires into the building (usually on the
main distribution frame / MDF), in conjunction with proper grounding. The center pin
of the GDT (MDF grounding bar) must be connected to the equipotential grounding
bus bar of the Telecommunication room.
• Failing to install primary surge protectors and failing to comply with the grounding
instructions or any other installation instructions, may cause permanent damage to
the device!
As most of the installation is the responsibility of the customer, AudioCodes can
•
assume responsibility for damage only if the customer can establish that the device
does not comply with the standards specified above (and the device is within the
hardware warranty period).
The device complies with protection levels as required by EN 55024/EN 300386.
•
Higher levels of surges may cause damage to the device.
To protect against electrical shock and fire, use a minimum of 26-AWG wire size to
•
connect the FXO / DSL ports.
MSBR Series
Protective Earthing
Grounding and Power Surge Protection
33
5. Cabling the Device
. The length of this cable must be
2
MSBR Series
2