Alcatel MainStreet 2902, Manual, Page: 7 / 344

Mandatory regulations
2902 MainStreet Technical Practices vii
May 2002 90-2906-01
Earths
The 2902 MainStreet system has three types of earth:
•
telecom safety earth (also known as functional earth)
•
protective earth
•
EDG (energy dumping ground)
The telecom safety earth connection is through pins designated as signal ground. The
telecom safety earth connector is located on the rear panel of the unit. See section 4.1
for specific instructions.
A green- and yellow-colored earth wire must be connected from the site equivalent
of the ac earth in accordance with IEEE Wiring Regulations (16th edition) and
HD384. This connection is made to the protective earth ground stud located on the
rear panel of the unit; see section 4.1 for specific instructions. The protective earth is
also carried by the mains plug and socket (for ac systems only).
The EDG connection is located on the rear panel of the unit.
The wire used for telecom safety earth, protective earth and EDG should be a
minimum of 1.5 mm 2 (AWG 16), green and yellow in color, and of sufficient length
to connect the building earth point to the unit. See section 4.1 for specific
instructions.
Equipment interconnection points
The interconnection points are defined as Safety Extra Low Voltage (SELV) (all
connectors on rear panel, except P1 and P2 optical connectors).
Connect SELV circuits on this equipment only to other circuits complying with the
requirements of SELV circuits as defined in CSA C22.2 No 60950, UL60950,
EN60950, AS/NZS 3260 and IEC60950.
Laser interface
The 2902 MainStreet unit uses a fiber-optic communications method and is a CLASS
1 LASER PRODUCT. Only trained, qualified service personnel thoroughly familiar
with laser radiation hazards should install or remove the fiber-optic cables and cards
in this system.
Electromagnetic compatibility
EMC compliance requires the use of:
•
ferrite beads on all interface cables
•
screened interface cables for Class B compliance
All Alcatel cables are shipped with the necessary special accessories required for
regulatory compliance.