enphase IQ System Controller 3M Quick Install Manual page 20

Section C - Wiring
Aux wiring: System
Shutdown Switch
Enphase System Shutdown (SSD) Switch wiring
(compliance requirement)
The IQ System Controller meets UL1741 PV RSE and NEC Rapid
Shutdown requirements for IQ8 Microinverters. The System
Shutdown Switch is the rapid shutdown initiator. The System
Shutdown Switch ensures a single point of initiation per NEC 2020.
The System Shutdown Switch, when turned off, also disconnects
the battery from the system.
Wiring for systems with
IQ8 Series Microinverters
System Shutdown header
System Shutdown Switch
1 3
4 2
NOTE: Control lines to headers support 28 AWG and 16 AWG
wire gauges.
NOTE: Do not use cables more than 20 ft. long for
connections between the System Shutdown Switch
and the System Shutdown header.
20
1 2 3 4
16 AWG wires
Butt splice wire
connectors
1 2 3 4
12 AWG wires
Wiring for systems with
non-IQ8 Series
Microinverters
1 2 3 4
16 AWG wires
Butt splice wire
connectors
1 2 3 4
12 AWG wires
IQ System Controller 3M quick install guide
System
Shutdown
header