Outback Power Systems FW-IOB-D-120/240VAC Input/Output/Bypass Assembly - Installation Instructions - Manual (Page 3)

Requirements and Warnings
The OutBack FW-IOB-D-120/240VAC is intended as a system component and is included in a listing
by ETL as indoor enclosures to UL standard UL 508A Industrial Control Panels.
This enclosure is intended for battery circuits configured for 12 to 48 volts nominal.
Grounding Instructions – Each enclosure should be connected to a grounded, permanent wiring
system. For most installations, the negative battery conductor should be bonded to the grounding
system at one (and only one) point in the DC system. All installations must comply with all national
and local codes and ordinances. System grounding as required by the National Electric Code,
ANSI /NFPA 70-1996, is the responsibility of the system installer.
The equipment ground is marked with this symbol: