WIRING DIAGRAMS
18
EARTHING ARRANGEMENTS – ALL SYSTEMS
Earthing connections must be made so the removal of one component (e.g. a module) does not interrupt the
earthing to other parts of a system (e.g. other modules). Daisy chaining is not permitted. The PV system
earth connection must be directly connected to the switchboard earth link, not via the inverter earth
connection. If the earth cable could be exposed to direct sunlight, it must have a physical barrier to protect
the earth cable from this exposure.
Earth wires must be sized in accordance with requirements set out in Earthing and bonding arrangements of
AS/NZS 5033.
Solahart approved earthing plates may be used to earth modules via the racking, instead of wiring directly to
the module frames. Refer to “Earthing” on page 38 for more information.
Warning:
Do not drill holes in the modules as this will void product warranty.
The racking may be earthed by means of a rooftop isolator bracket. Refer to “Installation - Rooftop Isolator”
on page 36 for details.
Where it is necessary to make an earthing connection to a rail that does not have a rooftop isolator bracket
fitted, a rail splice piece will provide a suitable surface for connection. In this case, the splice should be
attached to the end of the rail using both fixing bolts, and then the earth lug connected to the splice as shown
in the figures below:
1.
Slide rail splice onto end of rail, ensuring an overhang of approximately 50 mm.
2.
Secure rail splice by tightening both Allen head bolts to 15 Nm.
3.
Drill a hole in the centre of the rail splice, attach the earth cable using the earthing set supplied, and
tighten to 5 Nm.
Rail splice attached to rail with
both Allen head bolts
Earth cable connected to splice
