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Marine Fuel Injection (MEFI)
Boat wiring color code (DC)
| Function | Color |
|---|
| Ground | Black or Yellow |
| Positive | Red |
| Ignition positive | Purple |
| Fused positive | Orange |
| Tachometer sender | Gray |
| Oil Warning sender | Varies |
| Temperature sender | Tan |
| Trim Sender | White w/ Tan stripe |
| Instrument Lights | Dark Blue |
| Bow & Stern lights | Dark Gray w/ white stripe |
| Bilge Pump | Brown |
| Engine Kill Circuit | Black w/ Yellow stripe |
| Neutral-Start Circuit | Yellow w/ White Stripe |
| Power-trim main circuit | Purple (Merc)or
Red /w Blue or white stripeBlack |
| Power trim (Down) | Light Green w/ White Stripe |
| Power Trim (Up) | Light Blue w/ White Stripe |
| Hull Bonding Ground | Dark Green |
| Bilge Blower | Yellow |
E-8.14 SYSTEM WIRING
E-8.14.10 The AC grounding conductor shall be permitted to be one size smaller than the current carrying conductors on circuits rated greater than 30 amperes.
E-8.14.11 Conductors shall be at least 16 AWG.
EXCEPTIONS:
1. 18 AWG conductors may be used if included with other conductors in a sheath, and do not extend more than 30 inches (760 mm) outside the sheath.
2. 18 AWG conductors may be used as internal wiring on panelboards.
3. Conductors that are totally inside an equipment housing.
4. Pigtails less than 7 inches (178 mm) used as wiring on panelboards.
E-8.14.12 Conductors shall be identified to indicate circuit polarity as follows:
Colors
ungrounded conductor black, or brown
grounded neutral conductor white, or light blue
grounding conductor green, green w/yellow stripe
additional ungrounded conductors red, orange, blue,
additional colors for ungrounded conductors (black) black w/red stripe,
black w/ blue stripe,
black w/orange stripe
