Cisco Cisco FirePOWER Appliance 7125 Installationsanleitung
Version 5.3
Sourcefire 3D System Installation Guide
259
Power Requirements for Sourcefire Devices
83xx Family Appliances
Appendix A
Grounding/Earthing Requirements
The Sourcefire 3D System must be grounded to the Common Bonding Network.
Bonding Locations
Ground bonding locations are provided on the rear of the chassis. M4 studs are
provided. Outside-toothed lock washers are provided for attaching ring terminals.
A standard ground symbol is available by each stud.
The following illustration indicates the bonding locations on the 83xx Family 2U
The following illustration indicates the bonding locations on the 83xx Family 2U
chassis.
Recommended Terminals
You must use UL-Approved terminals for the ground connection. Ring terminals
with a clearance hole for 4mm or #8 studs may be used. For 10-12 AWG wire,
Tyco 34853 is recommended. This is a UL-approved, ring terminal with a hole for a
#8 stud.
Ground Wire Requirements
The ground wire must be sized sufficiently to handle the current of the circuit in
case of a single fault. The size of the ground wire should be equal to the current
of the breaker used to protect the circuit. For AC circuits, see
page 256. For DC currents, see
Bare conductors must be coated with antioxidant before crimp connections are
made. Only copper cables can be used for grounding purposes.
DC Supplies
The DC power supplies have additional ground connections on each supply. This
allows the hot-swappable supply to be connected to power, return and ground so
that it may be safely inserted. This ground lug must be attached.
It is a M4 screw with an outside-toothed lock washer screw.
The ground wire should be sized to match the breaker for the circuit.
It is a M4 screw with an outside-toothed lock washer screw.
The ground wire should be sized to match the breaker for the circuit.
Bonding Locations