Section 80
00-02-0829
2018-02-26
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10 -
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Insure that the voltage drop at the load is kept within the recommended
10 percent maximum level for the respective 12V or 24V power system.
•
Wire gauge reductions are permissible after the point at which circuit protection is
added or enabled.
•
Wires should be specified with suitable insulation type for the environment. For
instance, GXL (general purpose, cross-linked polyethylene insulated) wire with a
medium insulation thickness has a rating of +135°C (+275°F) where the compartment
temperatures can 80°C (+176°F) such as the engine compartment.
NOTE:
Review the individual over-current shutdown values in the
configuration and use the correct wire gauge conductor to accommodate
maximum load current configured.
•
Use a protective fuse or circuit breaker on the positive input power lead (J2) that is
sized appropriately for the PDM supply steady-state load current. Typical maximum
load current is 60 percent - 80 percent of the fuse rating not to exceed 70 A.
•
Verify that the harness is constructed to meet the needs of the application environment
(e.g. shock, vibration, moisture, temperature, chemicals and impact).
•
Make certain that the harness is designed and constructed to minimize induced
interference resulting from EMI coupling between signal wires.
•
Separate power circuits from low-level signals.
•
Make provisions for drip loops to attach devices in exposed locations and prevent
moisture entry and formation within the connectors.
•
Provide sufficient clearance from moving parts.
•
Wires routed through holes in the vehicle body/chassis should use grommets.
•
Avoid sharp metal edges, fasteners and other abrasive surfaces or use protective
shielding when routing harness assembly.
•
Route wires to avoid exhaust system components or other high temperature areas. Use
appropriate heat shielding or other insulation where routing is a problem.
•
Avoid routing near wheel wells or provide adequate mechanical protection (e.g.
convoluted conduit) to the wire assembly.
CABLE CONVERSION CHART – METRIC vs. ENGLISH
LOW-TENSION PRIMARY CABLE – SAE J1128
Metric
English
Metric
English
0.5 mm
2
20 Ga
5.0 mm
2
10 Ga
0.8 mm
2
18 Ga
8.0 mm
2
8 Ga
1.0 mm
2
16 Ga
13.0 mm
2
6 Ga
2.0 mm
2
14 Ga
19.0 mm
2
4 Ga
3.0 mm
2
12 Ga
