Installing Dc Pems - Alcatel-Lucent 7450 ESS-7 Installation Manual

Installing DC PEMs

Installing DC PEMs
This section provides information and instructions to perform the following:
•
•
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.
Page 64
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
7450 ESS-7