Nortel Networks BCM50 manual Wiring warnings

Chapter 9 Connecting the cables to the BCM50 system 103

Wiring warnings

Please read the following warnings before you connect any telephone lines or extensions to the BCM50 system:

Warning: Electrical shock warning

The MBMs have been safety approved for installation into the expansion unit. It is the responsibility of the installer and user to ensure that installation of the hardware does not compromise existing safety approvals.

BEFORE YOU OPEN the main unit or expansion unit, ensure that the network telecommunication cables are unplugged and the unit is disconnected from the ac power source.

Station modules: The ports on these modules are meant to be connected only to approved digital telephones and peripherals with the proper cables on a protected internal wiring system.

Do not connect any telephones to wiring that runs outside of the building.

Read and follow the installation instructions carefully.

Warning: Use only qualified persons to service the system.

The installation and service of this unit must be performed by service personnel with the appropriate training and experience. Service personnel must be aware of the hazards of working with telephony equipment and wiring. They must have experience in techniques that minimize any danger of shock or equipment damage.

Warning: Leakage currents

Service personnel must be alert to the possibility of high leakage currents becoming available on metal system surfaces during power-line fault events on network lines. These leakage currents normally flow safely to protective earth ground through the power cord. However, if the ac power is unplugged prior to disconnecting the cables from the BCM50 units, this hazard can occur.

System shutdown: You must disconnect the telephony and data networking cables from the system before disconnecting the power cord from a grounded outlet.

System startup: You must reconnect the power cords to a grounded outlet before reconnecting the telephony and data networking cables.

BCM50 Installation and Maintenance Guide