Juniper Networks EX4200 - Manual (Page 261)

Chapter 20
Power and Electrical Safety Information
■ General Electrical Safety Guidelines and Warnings for EX Series
Switches on page 235
■ Prevention of Electrostatic Discharge Damage on EX Series Switches on page 236
■ AC Power Electrical Safety Guidelines for EX Series Switches on page 238
■ AC Power Disconnection Warning for EX Series Switches on page 239
■ Multiple Power Supplies Disconnection Warning for EX Series
Switches on page 240
■ Power Sources for Redundant Power Supplies Warning for EX4200
Switches on page 240
■ DC Power Electrical Safety Guidelines for EX Series Switches on page 241
■ DC Power Disconnection Warning for EX Series Switches on page 242
■ DC Power Grounding Requirements and Warning for EX Series
Switches on page 244
■ DC Power Wiring Sequence Warning for EX Series Switches on page 245
■ DC Power Wiring Terminations Warning for EX Series Switches on page 246
■ TN Power Warning for EX Series Switches on page 247
■ In Case of Electrical Accident: Action to Take on an EX Series Switch on page 248
General Electrical Safety Guidelines and Warnings for EX Series Switches
WARNING: Certain ports on the switch are designed for use as intrabuilding
(within-the-building) interfaces only (Type 2 or Type 4 ports as described in
GR-1089-CORE , Issue 4) and require isolation from the exposed outside plant (OSP)
cabling. To comply with NEBS requirements and protect against lightning surges and
commercial power disturbances, the intrabuilding ports must not be metallically
connected to interfaces that connect to the OSP or its wiring. The intrabuilding ports
on the switch are suitable for connection to intrabuilding or unexposed wiring or
cabling only. The addition of primary protectors is not sufficient protection for
connecting these interfaces metallically to OSP wiring.
General Electrical Safety Guidelines and Warnings for EX Series Switches ■ 235