6 Electrical Connection
SMA America, LLC
36
SB3-5TLUS22-IA-en-10
Installation Manual
6 Electrical Connection
6.1 Safety during Electrical Connection
Danger to life from electric shock due to high voltages
High voltages are present in the DC cables and later during operations in the conductive
components of the inverter. These can cause fatal electric shocks.
• Before all later work on the inverter, always disconnect the inverter from all voltage sources
as described in Section 8.
• Do not open the upper enclosure lid.
Electrostatic discharges can damage the inverter
Touching electronic components can cause damage to or destroy the inverter through electrostatic
discharge.
• Ground yourself before touching any components.
Damage to the inverter due to moisture penetration
Electronic components in the inverter can be destroyed or damaged as a result of moisture
penetration.
• Only use listed conduit fittings for inserting the conduits into the inverter and the DC
Disconnect.
• Only use rain-proof or moisture-proof conduit fittings for outdoor installations.
Risk of damage to or failure of the inverter due to the use of Wire Nuts
®
The use of Wire Nuts
®
may cause ground faults or prohibited and high-ohm connections, which can
lead to inverter damage or failure.
• Do not use any Wire Nuts
®
for electrical connections in the PV system
Observe local regulations
All electrical installations must be made in accordance with the electrical standards
applicable on-site and the
National Electrical Code
®
(ANSI/NFPA 70). Installations in
Canada must be carried out in accordance with the applicable Canadian standards.
