Electrical fires are the #1 cause of boat loss at the dock. As a surveyor, you are not an ABYC certified electrician (unless you really are), but you are the first line of defense against catastrophic wiring habits.
Your job isn't to re-engineer the panel; it's to spot the "Uncle Bob" modifications that burn boats down.
1. The Scope of Inspection
Surveyors must walk a fine line. You observe, you test functionality, you check overcurrent protection, but you do not disconnect wires.
The Mantra: "Observed, Operated, Not Disassembled"
If you take a panel cover off and a wire falls out, you just bought it. Use a thermal camera to spot hot spots without touching a screw.
2. AC vs. DC: The Fatal Difference
- AC (Alternating Current): Kills people. Look for proper polarity (Reverse Polarity indicators are mandatory). Check the Shore Power inlet—look for burn marks on the pins (arcing).
- DC (Direct Current): Starts fires. 12V DC has massive amperage potential. A shorted battery cable turns into a welding rod in seconds.
3. The "Big Three" Hazards
1. Wing Nuts on Batteries
The Rule: Wing nuts are illegal on battery terminals unless you use tools to tighten them. Finger-tight is not enough.
The Fix: Replace with hex nuts and lock washers.
2. The "Rat's Nest"
The Rule: Wires must be supported every 18 inches.
The Fix: If you see a hanging ball of multicolored spaghetti, it’s a "Substandard Installation." Do not try to trace every wire. Flag the entire system as requiring professional organization.
3. Overcurrent Protection (Fuses/Breakers)
The Rule: Every positive wire connected to the battery MUST have a fuse within 7 inches of the battery terminal.
The Find: Look for small wires (bilge pumps, stereos) bolted directly to the positive post with no fuse. This is a fire waiting to happen.
4. Bonding: The Silent Killer
The green wire system connects all underwater metals to a common ground to prevent galvanic corrosion.
Visual Check:
Look at the seacocks. is there a green wire attached? Is the connection green and fuzzy (corroded)? If the bonding system is broken, the propeller might fall off in 6 months due to electrolysis.
Conclusion
Report what you see, not what you think. Use phrases like "Does not appear to comply with ABYC E-11" rather than "Illegal." You are flagging risk, not enforcing law.