Advanced Marine Electrics and Electronics Troubleshooting A Manual for Boatowners and Marine Technicians

126 electrical systems troubleshooting

+–

Windlass

• 
  
  
  
  • Wiper
  
  
  
  

Overcurrent

protection

Blower

Bilge pump

Float switch

Float switch

Grounding conductor Grounding conductor

Grounded

conductors

Engine Engine

Battery

switch

DC main

negative

bus

Accessory

negative

bus

DC negative bus

Parallel switch

or solenoid

AC grounding bus

Battery

switch

Fuel tank

Fill Gauge

Electronics

ground plate

Immersed lightning ground plate or strip

Lightning down conductor

(from lightning mast)

Large metal objects

Chainplates

Engine

negative

terminals

Seawater strainer

Seacock

+ +

+

Fuel tank

House

battery

Start

battery

Start

battery

Horn

Sacrificial zinc

Grounding bus Bondingconductors

Grounding AND

bonding conductor

Gauge Fill

Distribution Panel

Main feed

Overcurrent

protection

FOR

CORROSION

PROTECTION FOR

LIGHTNING

PROTECTION

FOR

SYSTEM

GROUNDING

A typical DC negative system and DC grounding system, adapted from ABYC Standard E-11, Figure 18. (Reprinted with

permission from Boatowner’s Illustrated Electrical Handbook,second edition, by Charlie Wing)