Instruction manual

Connecting to a –48 V DC Power Source
B-2 893-839-C
Safety Considerations
NOTE: Bay Networks recommends that you use crimp lug terminals that are UL listed and
CSA certified to connect the conductor cables. Failure to do so could compromise voltage and
temperature protection.
WARNING: Only qualified technicians should install and service this equipment.
The DC power input power source for the −48 V DC hub must be restricted to an output that is
limited to Safety Extra Low Voltage (SELV) output per IEC Definition. This input power source
must be reliably connected to ground and electrically isolated from the AC source.
The −48 V DC hub relies on the branch circuit protection in the building electrical service
installation. Bay Networks recommends that the protection device be rated at 30 amperes DC,
maximum.
Installation of the −48 V DC hub must be in accordance with the applicable electrical code of
the country of intended use.
CAUTION: As the installer, you have the sole responsibility to ensure that the connection
cable used with the −48 V DC hub is 14-22 AWG Listed copper wire or otherwise appropriate
for use with the DC power source to which the power supply is connected. Consider gauge,
flammability, and mechanical serviceability when determining which cables you will use.
NOTE: This equipment is intended to be used in a telecommunications environment in
accordance with the National Electrical Code Specification for a restricted access area.
7064
A short spring spade tongue terminal (such as AMP
part number CMA 509-3260) to connect to the
positive and negative terminal leads.
893-839-CBook Page 2 Thursday, December 12, 1996 4:18 PM