SMA Solar Technology America LLC
6 Electrical Connection
Installation Manual
CU1000-US-11-IA-en-13
25
6 Electrical Connection
6.1 Safety during Electrical Connection
Danger to life due to high voltages in the Connection Unit
High voltages that can cause fatal electric shocks are present in the live components of the
Connection Unit.
• All work on the Connection Unit must be carried out by qualified persons only.
• Prior to performing any work on the Connection Unit, disconnect it from any voltage source
as described in this document (see Section 8).
• All work on the Connection Unit should only be carried out as described in this document.
Damage to the seal of the enclosure lid during freezing conditions
When opening the Connection Unit during freezing conditions, the seal of the enclosure lid can be
damaged, which can lead to ingress of moisture and damage to the Connection Unit.
• Do not open the Connection Unit when the ambient temperature is below 23°F ( − 5°C).
There might be ice on the seal of the lid when there is frost or the temperatures are below
freezing. Remove it prior to opening the Connection Unit (e.g. by melting the ice with warm
air). Adhere to the corresponding safety precautions.
Damage to the Connection Unit due to moisture ingress during electrical installation
• Do not open the Connection Unit in the event of rain or a high level of humidity (> 95%).
• For attaching the conduits to the enclosure, only use UL-listed rainproof or wet location conduit
fittings in accordance with UL514B.
• Seal any unused openings using rain tight or wet location hole seals.
Electrostatic discharge
By touching electronic components you can damage or destroy the Connection Unit through
electrostatic discharge.
• Ground yourself before touching any components.
Risk of damage or failure due to improper connections
Insecure or high-resistance connections (such as improperly installed twist-on connectors) may cause
ground or arcing faults, which can lead to damage or failure and unreliable system performance.
• Select and properly install connectors which ensure secure, low-resistance connections for all
electrical connections in the PV system.
Summary of Contents for CU 1000-US-11
Page 1: ...CU1000 US 11 IA en 13 Version 1 3 CA US Installation Manual SMA CONNECTION UNIT 1000 US...
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Page 6: ...General Warnings SMA Solar Technology America LLC 6 CU1000 US 11 IA en 13 Installation Manual...
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