Trane Thermo King V-520 RT SPECTRUM 50 Installation Manual page 60

Installation - Electrical Connections to Battery
Positive (+)
See Important note below.
Negative (-)
Heat Shrink Tubing Butt Splice
See Important note below.
Unit Power Wire
IMPORTANT: The ring terminals used must be sized to match the battery power stud or lug bolt. Oversized ring terminals can contribute to high
resistance resulting in the fuse overheating and failure.
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