Juniper Networks EX4200 - Manual (Page 262)

CAUTION: Before removing or installing components of a switch, attach an ESD
strap to an ESD point and place the other end of the strap around your bare wrist.
Failure to use an ESD strap could result in damage to the switch.
■ Install the EX Series switch in compliance with the following local, national, and
international electrical codes:
■ United States—National Fire Protection Association (NFPA 70), United States
National Electrical Code.
■ Other countries—International Electromechanical Commission (IEC) 60364,
Part 1 through Part 7.
■ Evaluated to the TN power system.
■ Canada—Canadian Electrical Code, Part 1, CSA C22.1.
■ Locate the emergency power-off switch for the room in which you are working
so that if an electrical accident occurs, you can quickly turn off the power.
■ Make sure that grounding surfaces are cleaned and brought to a bright finish
before grounding connections are made.
■ Do not work alone if potentially hazardous conditions exist anywhere in your
workspace.
■ Never assume that power is disconnected from a circuit. Always check the circuit
before starting to work.
■ Carefully look for possible hazards in your work area, such as moist floors,
ungrounded power extension cords, and missing safety grounds.
■ Operate the EX Series switch within marked electrical ratings and product usage
instructions.
■ To ensure that the EX Series switch and peripheral equipment function safely
and correctly, use the cables and connectors specified for the attached peripheral
equipment, and make certain they are in good condition.
You can remove and replace many switch components without powering off or
disconnecting power to the switch, as detailed elsewhere in the hardware
documentation for this product. Never install equipment if it appears damaged.
Related Topics General Safety Guidelines and Warnings for EX Series Switches on page 207 ■
■ AC Power Electrical Safety Guidelines for EX Series Switches on page 238
■ DC Power Electrical Safety Guidelines for EX Series Switches on page 241
Prevention of Electrostatic Discharge Damage on EX Series Switches
Switch components that are shipped in antistatic bags are sensitive to damage from
static electricity. Some components can be impaired by voltages as low as 30 V. You
can easily generate potentially damaging static voltages whenever you handle plastic
236 ■ Prevention of Electrostatic Discharge Damage on EX Series Switches
Complete Hardware Guide for EX3200 and EX4200 Ethernet Switches