Step 5 - Prepare The Wiring - Tesla Powerwall Installation Manual

Step-by-Step Installation Instructions

STEP 5 - PREPARE THE WIRING

Refer to local building and electrical codes when selecting appropriate wire gauge and length. Cut
the ends of the wires to have clean, even ends. Strip the ends of the wires enough to make solid
contact in the connector, while ensuring that no bare wire extends beyond the connector edge.
To ensure that installation is as simple as possible, select flexible wires with the smallest overall
approved diameter. The wiring compartment is relatively small and the use of small diameter wires
significantly speeds and simplifies the installation process.
A single 12 V power connection is required to power the logic. The Logic 12 V might be called
"Logic," "Always On," "Communication," or similar.
Caution: Do not splice wiring inside Powerwall.
Caution: Do not add extra wiring to the left of the conduit or gland entry. Additional wiring
may interfere with water ingress and high voltage shielding to the pump.
Note: Use shielded twisted pair communication wire and ground the shielding at one end. This
reduces the possibility of noise on the communication cable. Do not ground the shield at both
ends, which would create a ground loop.
Note: The 450 VDC cable is run in close proximity to the low voltage and communication cabling.
Therefore, ensure that all cables to Powerwall are:
• Wet or oil rated
• At least 600 V insulation class
If low voltage and communication wires do not already meet these requirements, 600V insulation
class heat shrink can be added around the bundle during installation.
12 Powerwall Installation Manual