10
Form 122067
SPS Wiring:
6.1 DC Wiring:
1
It is recommended in all cases to use stranded copper wires.
2
Use SGX cross-linked polyurethane insulation type that complies with the high
temperature insulation requirements (125°C.) of SAE J-1127 and vehicle
manufacturer requirements.
3
Wire gauge recommendations are minimum. For higher temperature rated,
applications inside engine spaces or large motor loads and other applications with
high surge currents use wire gauge 1 to 2 sizes larger than shown on table I.
4
Keep the wire runs between battery and SPS as short as possible.
5
Use Bussmann fuse type ANN-XXX and fuseblock # 3576 where XXX is the size of
the fuse.
6.1.1
Inverter Cable:
This is the cable that runs from the SPS module to the
batteries. Estimate the “inverter cable” length and locate your SPS model on table I,
cross-reference the wire gauge and fuse size.
Table I: Wire and Fusing Guide for 12VDC systems at 5% Voltage Drop at Full Output
Figure 4: Inverter cable assembly
6.1.2 Charge Cable:
This is the cable that runs from the batteries to vehicle
alternator or OEM engine battery. Use 2-gauge cables and 250A fuse for small OEM
alternators and 1/0-gauge and 350A for heavy-duty alternators.
Inverter
Model
Full Load
(Amps DC)
Inverter to battery estimated cable length in feet
1’ – 10’
11’ – 15’
16’ – 20’
24U15
75
6-gauge, 150A fuse 4-gauge, 200A fuse 2-gauge, 250A fuse
To inverter
DC input
To
Batteries
Fuse-holder
Black wire (-)
A
20 feet maximum
B
18” max.
Red wire (+)
A
B
Fuse
B terminal: 5/16” Ring
A terminal:
3/8” Ring