SMA America, LLC 6 Electrical Connection
Technical description SI4548_6048-US-TB_en-13 47
Connecting the AC1 Cables:
1. Install a conduit with a diameter of
3
/
4
in. (19 mm) at the left opening on the left side of the
Sunny Island enclosure. Attach the conduit on the inside of the Sunny Island with a counter nut.
2. Install the conduit on the distribution board.
3. Pull the cable from the distribution board through the conduit into the Sunny Island.
4. Remove the protective insulation of the three conductors (isolation stripping length:
3
⁄
4
in.
(18 mm)).
5. Insert PE into the terminal labeled "AC1 Loads/Sunny Boys" and tighten the fastening screw with
a torque of 22 in-lbs. (2.5 Nm). Use a torque wrench with flat-blade screwdriver bit SZS 1.0 x 6.5.
6. Insert N and L into the terminals labeled "AC1 Loads/Sunny Boys" and tighten the fastening
screws with a torque of 22 in-lbs. (2.5 Nm). Use a torque wrench with flat-blade screwdriver bit
SZS 1.0 x 6.5.
☑ The AC1 cables are connected.
Cable cross-section
The maximum cable cross-section for connecting the loads/PV inverters is 4 AWG (25 mm²).
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