Chapter 1 — Introduction
Vehicle Power Supply Installation Guide 5
Input Power Cable
One end of the input power cable has a 4-pin connector, the
other has a 2-pin connector. By cutting off the unneeded
connector, a single cable can meet either low or high voltage
input-range power supply requirements. See “Mounting the
Power Supply” on page 14 for detailed instructions for attaching
the power cable.
Inline Fuse
A snap-twist inline fuse holder is furnished as part of this kit. It
must be connected as close as possible (electrically and physically)
to the vehicle power source. It provides catastrophic failure and
short-circuit protection for the entire input power cable and the
power supply input.
The fuse holder contains a 3AB, 20-ampere/250 VDC (1/4x1-1/
4 inch) fast-blow fuse, recommended for installation with 12-volt
automotive batteries. For other vehicle battery voltages, please
refer to the table that follows.In general, smaller fuse ratings offer
faster acting protection. The alternate fuses listed are not
provided with the kit and must be obtained separately.
Note: Keep the cable as short as possible. Extra cable
picks up noise, adds power loss, and can snag on
equipment.
The input power cable may be shortened as needed,
but should not be extended on 12V or lower systems.
For higher voltage systems, keep cable extensions to a
minimum and use only equivalent or lower gauge
(larger diameter) wire.
Note: The 20A fuse is fast-blow. Replacement, lower
current rated fuses are to be slow-blow types.
Recommended Fuse Values
Lift Voltage Fuse Ratings Description
12V 20A Fast blow (shipped with product)
24V 10A Slow blow
36V 6A Slow blow (maximum fuse value)
48V 5A Slow blow (maximum fuse value
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