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VI.
Wiring Diagrams and Proper Use
The QBox can be used to transition a single string, two parallel strings, or two combined strings. Below are wiring
diagrams for all the approved use cases. All wires are to be copper conductors with insulation rated to 90°C or higher.
Maximum size of incoming PV string wires is #10 AWG. Maximum size of outgoing branch circuit is #8 AWG. Ground
wires can be green or bare according to the NEC.
Single String
Two Parallel String
BI 7.2.3-44
11
Nov-2017, Rev 2
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