Rack Mount and Power On Procedures
Applying DC power to the GRF 400
GRF 400/1600 Getting Started - 1.4 Update 2
October, 1998
3-11
Applying DC power to the GRF 400
Site installation requirements
!
Warning:
The DC power supply must be installed only in restricted access areas
(dedicated equipment rooms, equipment closets, or the like) in accordance with Articles
110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA 70.
Connect to a 48V DC source which is electrically isolated from the AC source and which is
reliably connected to earth.
This equipment is designed to permit the connection of the grounded conductor of the DC
supply circuit to the grounding conductor at the equipment. If this connection is made, all of
the following conditions must be met:
•
This equipment shall be connected directly to the DC supply system grounding electrode
conductor or bonding jumper from a grounding terminal bar or bus to which the DC
supply system grounding electrode conductor is connected.
•
This equipment shall be located in the same immediate area (such as adjacent cabinets) as
any other equipment that has a connection between the grounded conductor of the same
DC supply circuit and the grounding conductor, and also the point of grounding of the DC
system. The DC system shall not be grounded elsewhere.
•
The DC supply source is to be located within the same premises as the equipment.
•
There shall be no switching or disconnecting devices in the grounded circuit conductor
between the DC source and the point of connection of the grounding electrode conductor.
•
All DC input wiring shall be routed away from any sharp edges and properly secured in
place to prevent chaffing and to provide strain relief. This may be achieved by tie
wrapping the wires to the rack frame or by equivalent means.
!
Warning:
A readily accessible disconnect device must be provided in the fixed wiring for a
DC power supply. It must be suitable for the rated voltage and current specified.
Warnung
: In der Festverdrahtung für ein Gleichstromnetzteil muß ein leicht zugänglicher
Trennschalter vorgesehen werden. Er muß für die angegebene Nennspannung und den
Nennstrom geeignet sein.
Warning:
Over-current and earth fault protection must be provided in the fixed wiring. This
protection must be sized accordingly to interrupt the maximum available fault current.
Warnung
: Überstrom- und Erdschlußschutz muß in der Festverdrahtung vorhanden sein. Zur
Unterbrechung von maximal vorhandenem Fehlerstrom muß dieser Schutz von der
entsprechenden Größenklasse sein.
