Juniper EX4400 - DC Power Electrical Safety Guidelines for EX4400 Switches

Power Cable Warning (Japanese)
WARNING: The aached power cable is only for this product. Do not use the cable for another product.
DC Power Electrical Safety Guidelines for EX4400
Switches
• For permanently connected equipment, a readily accessible disconnect device shall be incorporated
external to the equipment.
• For pluggable equipment, the socket-outlet shall be installed near the equipment and shall be easily
accessible.
• Be sure to connect the ground wire or conduit to a solid central oce earth ground.
• A closed loop ring is recommended for terminang the ground conductor at the ground stud.
• Run two wires from the circuit breaker box to a source of 48 VDC.
• Ensure that the polarity of the DC input wiring is correct. Under certain condions, connecons with
reversed polarity might trip the primary circuit breaker or damage the equipment.
• Provide a 20 A 2-pole breaker or a circuit breaker as per local electrical code.
NOTE: Primary overcurrent protecon is provided by the building circuit breaker. This breaker
must protect against excess currents, short circuits, and earth grounding faults in accordance
with NEC ANSI/NFPA 70.
270