Polycom V2IU Converged Network Appliance 6400-S - Manual (Page 14)

User Guide V 2 IU 6400-S Converged Network Appliance
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Overcurrent protection
The 6400-S is designed for an AC line voltage source with up to 20 amperes of
overcurrent protection per cord feed. If the power system for the equipment
rack is installed on a branch circuit with more than 20 amperes of protection,
you must provide supplemental protection for the 6400-S. The overall current
rating of a 6400-S configured with two power supplies is less than 4 amperes.
If DC power supplies are installed:
Connection with a DC source should only be performed by trained service
personnel. The 6400-S with DC input is to be installed in a Restricted Access
Location in accordance with articles 110-16, 110-17, and 110-18 of the National
Electric Code, ANSI/NFPA 70. The DC source must be electrically isolated by
double or reinforced insulation from any hazardous AC source. The DC
source must be capable of providing up to 650 Watts of continuous power per
feed pair.
Main DC power disconnect:
You are responsible for installing a properly rated DC power disconnect for
the 6400-S system. This mains disconnect must be readily accessible, and it
must be labeled as controlling power to the 6400-S. The circuit breaker of a
centralized DC power system may be used as a disconnect device when easily
accessible and should be rated no more than 10 amps.
Grounding the 6400-S
To avoid the potential for an electrical shock hazard, you must reliably connect
an earth grounding conductor to the 6400-S. The earth grounding conductor
must be a minimum 14AWG connected to the earth ground stud(s) on the rear
of the 6400-S. The safety ground conductor should be connected to the chassis
stud with a Listed closed two-hole crimp terminal with a maximum width of
0.25 inch. The nuts on the chassis earth ground studs should be installed with
a 10 in/lbs torque. The safety ground conductor provides proper grounding
only for the 6400-S. You must provide additional, proper grounding for the
rack and other devices installed in it.
Overcurrent protection
Overcurrent protection circuit breakers must be provided as part of each host
equipment rack and must be incorporated in the field wiring between the DC
source and the 6400-S. The branch circuit protection shall be rated minimum
75Vdc, 10 A maximum per feed pair. If the DC power system for the
equipment rack is installed with more than 10 amperes of protection, you must
provide supplemental protection for the 6400-S. The overall current rating of
a 6400-S configured with two power supplies is 8 amperes.
Do not attempt to modify or use an AC power cordset that is not the exact type
required. You must use a power cordset that meets the following criteria: