Thermo King 42-2499 Installation Procedures

60 Amp In-Line Fuse Assembly Kit

Recommended Best Practices

• The in-line fuse must be located in an accessible location as close to the battery as possible while keeping
it from directly touching or laying on the battery.
• The distance from the battery positive (+) terminal to the in-line fuse should be kept to a minimum and
not exceed 12.00 in. (305 mm).
• Depending on the application, the wire from the in-line fuse to the unit's power wire may need to be
shortened to eliminate excess or coiled wire.
• The in-line fuse should be positioned vertically to help promote water drainage.
• Fuses mounted horizontally must have the slit in the sleeving pointing downwards.
• If the vehicle is equipped with a battery disconnect switch, always connect the unit's power wire after the
switch. This allows power to the unit to be turned off by the battery disconnect switch.
• 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. Various size
terminal rings are provided in the kit - choose the correct size for your specific battery requirement.
• All hand crimped terminals must be securely crimped, soldered and covered with heat shrink tubing.
• The in-line fuse must be secured to the vehicle or alongside the positive battery cable with the supplied
cable ties.
• Use harness routing that provides adequate protection against possibility of short circuit.
• All battery/electrical connections must be clean and tight.
TK 56239-11-IM (Rev. 0, 01/16) Copyright© 2016 Thermo King Corp. Minneapolis, MN, USA
Installation Procedures
KIT 42-2499

KIT COMPONENTS

Item P/N
1. NSS 60 Amp In-Line Fuse Assembly
2. 413408 Butt Splice Connector
3. 418311 Ring Terminal, 3/8'' 6 AWG
4. 419797 Ring Terminal, 5/16'' 6 AWG
5. 419580 Ring Terminal, 1/4'' 6 AWG
6. 552332 Cable Ties
7. NSS Heat Shrink Tubing, 1-1/2'' long
8. TK 56239 Installation Procedures
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