Alcatel-Lucent 7450 ESS-7 - Installing DC Pems

Installing DC PEMs
Page 64 7450 ESS-7
Installing DC PEMs
This section provides information and instructions to perform the following:
• DC Power Warnings and Notes on page 64
• DC-Input Power Wiring on page 68
→ Preparing the Power Cable on page 68
→ DC Input Terminal Block Wiring on page 70
DC Power Warnings and Notes
Danger:
• The unit should be connected to a DC branch circuit with a 60A circuit breaker or fuse which
meets the requirements for branch circuit protection. A suitable disconnect device must be
provided in the DC branch, either a circuit breaker or switch that can be employed to
disconnect power to the system during servicing.
• Confirm that the DC power source is OFF during installation. The power source should be a
safety extra-low voltage (SELV) source.
• The 7450 ESS-7 chassis with DC PEMs should be installed only in restricted access areas
(such as dedicated equipment rooms and electrical closets) in accordance with Articles 110-26
and 110-27 of the most recent National Electrical Code ANSI/NFPA 70.
Warning:
• Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
removed from the DC circuit.
Caution:
• The 7450 ESS-7 must be connected directly to the DC PEM’s earthing electrode conductor or
to a bonding jumper from an earthing terminal bar or bus to which the DC PEM earthing
electrode is connected.
• The DC power source must be located within the same premises as this equipment.
• There must be no switching or disconnecting devices in the earthed circuit conductor between
the DC source and the point of connection of the earthing electrode conductor.
• #6 AWG conductors for main wiring is suitable for main wiring. Other field wiring
applications should be in accordance to the National Electric Code, NFPA 70 or local
electrical code requirements.