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

6 Electrical Connection
Additionally required material (not included in the scope of delivery):
☐ Conduits (trade size: 21 mm (0.75 in) or smaller with suitable reducer bushing)
☐ UL-listed raintight or liquidtight conduit fittings (trade size: 21 mm (0.75 in) or smaller with
suitable reducer bushing)
Requirements on the DC conductors:
☐ The conductors with regards to its ampacity, rated temperatures, operating conditions and its
power loss must be made in accordance with the local standards and the National Electrical
®
Code ANSI/NFPA 70 or the Canadian Electrical Code
☐ The DC terminal block temperature rating is +90°C (+194°F).
☐ Conductor type: copper wire
☐ Maximum permissible temperature: 75°C (+167°F) or 90°C (194°F)
☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using
fine stranded wire, bootlace ferrules must be used.
☐ Conductor cross-section: 2.5 mm² to 10 mm² (14 AWG to 8 AWG)
6.6.2

Connecting the PV Array

Damage to the inverter due to ground fault on DC side during operation
Due to the transformerless topology of the product, the occurance of ground faults on DC side
during operation can lead to irreparable damage. Damages to the product due to a faulty or
damaged DC installation are not covered by warranty. The product is equipped with a protective
device that checks whether a ground fault is present during the starting sequence. The product is
not protected during operation.
• Ensure that the DC installation is carried out correctly and no ground fault occurs during
operation.
Requirements:
☐ The grounding of the PV system must be executed as per the specifications of the National
®
Electrical Code ANSI/NFPA 70 and is the responsibility of the installer.
☐ All electrical installations must be carried out in accordance with the local standards and the
National Electrical Code
48 SBxx-1SP-US-41-IA-xx-12
NOTICE
®
ANSI/NFPA 70 or the Canadian Electrical Code
SMA Solar Technology AG
®
CSA C22.1.
®
CSA C22.1.
Installation Manual