Installation Manual
BI 7.2.3-44
June 2018, Rev 4
11
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. In order to ensure a reliable long term connection it is highly recommended
to use waterproof connectors such as King Innovations Aqua/Blue & Aqua/Red connectors. However, non waterproof
connector that meet the requiremnets in Section VII of this manual are certied for use with this product.
VI. Wiring Diagrams and Proper Use
Single String
Two Parallel String
NOTES
Line drawing does not represent
all possible ground congurations.
Your installation may have more
ground wires than the drawing
shows. Refer to the connector
manufaturer's manual to ensure
that the connector is acceptable
for the size and number of ground
conductors.