PV Powered PVP2000, Руководство по установке и эксплуатации

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18
Maximum
Current Rating
Minimum Size of Grounding
Electrode Conductor AWG
Copper Aluminum
Copper Clad
15 8 6
20 8 6
30 8 6
40 8 6
60 8 6
Table 4-4 Grounding Electrode Conductor Sizing
Disconnect Grounding
The AC/DC Disconnect uses a single-point grounding connection, the
grounding lug, providing continuity for both the EGC and GEC.
The grounding lug is permanently bonded to the metal of the disconnect.
The grounding lug is provided to facilitate the system ground bonding
to the cabinet. This is the only place the GEC should be connected to the
disconnect.
The inverter/disconnect unit are connected by copper conductors and
do not rely on conduit connections for bonding. All ground connections
between the inverter cabinet and the disconnect cabinet are completed at
the factory. During installation you will complete the ground connections
by:
• Connecting the GEC coming from the PV system array, and
• Connecting the EGC coming from the main utility service panel.
Figure 4-4 shows the pre-existing ground connections between the inverter
and disconnect cabinets and the location of the ground connections that
need to be completed. For information on connecting or disconnecting
the single-point ground when replacing the inverter, see
Connecting the
Ground Conductors of Multiple Units on page 27.