Damage to the inverter due to moisture ingress during electrical installation
• Never open the inverter when it is raining or snowing, or the humidity is over 95%.
• For attaching the conduits to the enclosure, only use UL-listed rain-tight conduit fittings or UL-
listed conduit fittings for wet locations complying with UL514B.
• Seal all unused openings tightly.
Ground faults, unreliable and highly resistive connections due to
Wire Nuts
®
Potential damage to or failure of the inverter.
• Do not use
Wire Nuts
®
.
Electrical installations
All electrical installations must be carried out in accordance with the local standards and the
National Electrical Code
®
ANSI/NFPA 70 or the
Canadian Electrical Code
®
CSA C22.1.
• Before connecting the inverter to the utility grid, contact your local grid operator. The
electrical connection of the inverter must be carried out by qualified persons only.
• Ensure that no cables used for electrical connection are damaged.
6 Electrical Connection
SMA Solar Technology AG
Installation Manual
STP12-24TL-US-IA-en-16
26