Requirements for the AC Grounding Conductor

For the grounding conductor (PE) of the connection to the utility grid, the following requirements apply that are different from the requirements for the other conductors.

  • Conductor type: copper wire

  • Permissible temperature: at least 90°C (194°F)

  • The grounding conductor must be solid or stranded wire.

  • Maximum cable length within the inverter: 180 mm (7.1 in)

  • Conductor cross-section: 16 mm² (6 AWG)

  • Insulation stripping length: 18 mm (0.7 in)

  • The conductors with regards to their ampacity, rated temperatures, operating conditions and power loss must be made in accordance with the local standards and the National Electrical Code® ANSI/NFPA 70. If the manufacturer (SMA Solar Technology AG) requires a higher conductor cross-section than the standard, the range of the manufacturer must be observed.

    Also see:

    Cable Requirements
    Requirements on the AC conductors