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Appendix A
Power Requirements for Firepower 7000 Series Devices
Power Cords
The power connections on the power supplies are IEC C14 connectors and they will accept IEC C13
connectors. A UL-recognized power cord must be used. The minimum wire gauge is 16 AWG. The cords
supplied with the appliances are 16 AWG, UL-recognized cords with NEMA 515P plug. Contact the
factory about other power cords.
Grounding/Earthing Requirements
The Firepower 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 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. See
Current, page
Bare conductors must be coated with antioxidant before crimp connections are made. Only copper cables
can be used for grounding purposes.
A-4.
Firepower 71xx Family Appliances
Firepower 7000 Series Hardware Installation Guide
A-5
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