Chapter 4: Connecting the AC and the Strings
to the Safety Switch
The Safety Switch disconnects all ungrounded DC conductors in compliance with the
National Electric Code (NEC; Specifically NEC690.35, which addresses ungrounded PV
arrays). The Safety Switch is rated to the maximum operating conditions of the inverter.
Inverters of different models are equipped with different sizes/ types of terminal blocks.
The following figures illustrate several of the available Safety Switches.
Figure 19: Inside the Safety Switch for three phase inverters
(9kW, 10kW, 20kW)
Chapter 4: Connecting the AC and the Strings to the Safety Switch 41
Three
Phase
System
Installation
Guide
MAN-01-00527-1.2
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