LS600 Installation and Operation Guide
14
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Step 5: Install AC Branch Circuit Junction Box
Risk of Electrical Shock. Remove AC power from system before installing the AC
branch circuit junction box. Each AC branch circuit must have a 18A maximum
circuit breaker.
Additional lightning protection equipment may be necessary for some locations.
For each AC branch, an AC junction box is required for routing the AC grid to the microinverters. Follow the
steps listed below carefully to install the AC junction box:
1.
Install the AC junction box to a proper
location of the branch circuit. The most
common location for the junction box is the
beginning or middle of an AC branch. For
the latter location, be aware that two
microinverters in one AC branch circuit have
unused AC cables to be terminated.
2.
Put the AC cable from inverter side into the junction box with anti-pull accessories and proper washers.
3.
Pay attention to the wire colors in the cable. The electrical codes usually have the following specification
for the wire color: Red-Hot wire; Black- Neutral wire; Ground: yellow/green double color wire.
4. Connect and secure the cable from AC grid side to the terminals inside the junction box. This step will
connect the microinverter to the AC grid. Make sure the AC grid power is always removed during this step.
5. Close the cover of the AC junction box tightly by securing the screws on the corners of the cover
Step 6: Ground the System & Microinverter
For safety considerations, all non-current carrying elements in a photovoltaic system (including PV module,
PV racking and microinverter case) must be securely grounded before operation. Choose one of the two
methods below for system grounding:
1.
Run a continuous grounding conductor from each microinverter to the AC grounding electrode. This is
the most common method. Connect the PV module frame, PV racking and microinverter case to this
grounding conductor by using grounding washers. Tighten the grounding clamp screw.
