Connecting The Pv Array - SMA SUNNY BOY 3.0-US Instructions D'installation

6 Electrical Connection
6.4.2

Connecting the PV Array

Requirements:
☐ The grounding of the PV system must be executed as per the specifications of Paragraph
690.41 to 690.47 of the National Electrical Code
of the installer.
☐ All electrical installations must be carried out in accordance with the local electrical standards
and the National Electrical Code
C22.1.
Procedure:
1.
Danger to life due to high voltages
When exposed to sunlight, the PV array generates dangerous DC voltage which is present in
the DC conductors. Touching the DC conductors can lead to lethal electric shocks.
• If an external DC disconnecting switch is available, open the external DC disconnecting
switch.
• If there is no external DC disconnecting switch, cover the PV modules with opaque
material (e.g. foil).
• Ensure that the DC load-break switch on the inverter is in the O position.
• Ensure that there is no voltage on the DC cables of the PV array.
2. Remove the adhesive tape from the enclosure opening for the DC connection and, if other
enclosure openings are to be used, take the sealing plugs out of these enclosure openings.
3. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
4. Attach the conduit to the conduit fitting.
5. Guide the conductors from the conduit into the inverter. In the process, lay the conductors in
the inverter such that they do not come into contact with the communication assembly.
6. Connect each equipment grounding conductor of the PV array to an equipment grounding
terminal:
• Strip the insulation of the equipment grounding conductor by 18 mm (0.71 in).
• Insert the screw through the spring washer, the clamping bracket and the washer.
• Guide the equipment grounding conductor
between the washer and clamping bracket
and tighten the screw with a Torx
screwdriver (TX 25) (torque: 6 Nm ±
0.3 Nm (53.10 in-lb ± 2.65 in-lb)). Here,
the equipment grounding conductor must
have contact with an inner edge of the
clamping bracket.
34 SB30-77-1SP-US-40-IA-xx-13
®
ANSI/NFPA 70 and is the responsibility
®
ANSI/NFPA 70 or the Canadian Electrical Code
SMA Solar Technology America LLC
Installation Manual
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CSA