Caution - The DC power source must be reliably grounded. The server chassis must be grounded with the power supply ground pins or with the chassis ground studs. It is acceptable to have both grounds connected.
Note - The DC version of the server must be installed in a restricted-access location. According to the intent of the U.S. NEC, National Electrical Code, a restricted-access location is an area intended for qualified or trained personnel only and has access controlled by a locking mechanism, such as a key lock or an access card system.
Caution - You must restrict the connection of the server to the DC power source to minimize the possibility that transient energy will appear on the main input to the equipment. The DC battery power source must be in the same premises as the server. The server cannot be in one building with the power source in another building.
Suitable conductor material: Use copper conductors only.
Power supply connections through the input connector: 8 AWG (between the server and the source). There are three conductors:
-48V or -60V (negative terminal, might be marked with a minus (-) symbol).
Chassis ground connection (optional if chassis ground wire is connected).
-48V or -60V return (positive terminal, might be marked with a plus (+) symbol).
Server chassis ground 8 AWG conductor (optional if power supply grounds are connected).
Cable insulation rating: Minimum of 75°C (167°F). (Low smoke fume (LSF), flame retardant insulation might be required in some installations.)
Use mating connectors, Wago part number 51204745, for proper connection to the product DC inputs. Connectors are included in the server's shipping kit.
Branch circuit cable insulation color: According to applicable national electrical codes.
Grounding cable insulation color: Green/yellow.
DC power source must meet TNV-2 requirements as defined by UL 60950-1 and IEC 60950-1.