Administrator Guide

6 Product Information Guide
The system using a DC power supply must be connected directly to the system-earthing
electrode conductor, to a bonding jumper from an earthing terminal bar, or the bus to which the
system earthing electrode conductor is connected.
The system using a DC power supply must be located in the same immediate area (such as
adjacent cabinets) as any other equipment that has a connection between the earthed conductor
of the same DC power supply circuit and the earthing conductor, and also the point of earthing
of the DC-powered system.
The DC power supply must be located within the same premises as the equipment.
Switching or disconnecting devices must not be in the earthed circuit conductor between the
source of the DC power supply and the point of the connection of the earthing electrode
conductor.
Instructions for the Qualified Electricians ONLY:
Systems using –(48–60) V DC Power Supplies are intended for restricted access locations in
accordance with Articles 110-5, 110-6, 110-11, 110-14, and 110-17 of the National Electrical
Code, American National Standards Institute (ANSI)/National Fire Protection Association
(NFPA) 70.
Before connecting safety ground or power cables, ensure that the power is removed from the
DC circuit. To ensure that the power is off, locate the circuit breaker on the DC source circuit
(usually at the power distribution of the battery distribution fuse bay). Switch the circuit breaker
to the off position and, if available, install an approved safety locking device on the circuit breaker
or switch.
While grounding techniques may vary, a positive connection to a safety (earth) ground is a
requirement.
When installing the unit, the ground connection must always be made first and disconnected
last to prevent a hazard.
Never defeat the ground conductor or operate the equipment in the absence of a suitably
installed ground conductor. Contact the appropriate electrical inspection authority or an
electrician if you are uncertain that suitable grounding is available.
The system chassis must be securely grounded to the rack cabinet frame. Do not attempt to
connect power to the system until grounding cables are connected.
When stranded wiring is required, use approved wiring termination, such as closed-loop or spade-
type with upturned lugs. These terminations should be the appropriate size for the wires and
must be double crimped, one on the conductor and one on the insulation. For additional
information, see the cabling instructions provided with your system.
RGD3KA04.book Page 6 Monday, November 10, 2014 12:25 PM