So a miss is as bad as a hit - sort of speak. I guess the EMF phenomena exists either way.Surveyor deemed it a lightning near miss as no other physical damage was ever found.
Got my 1991 mac26 and was out sailing - hanging onto the mast - it felt "fuzzy" Took a few days to realize it was electricity - same thing - indoor wire.Sidenote - I'm a DC electrical novice planning on tackling a full electrical system re-wire and upgrade on a MacGregor 25 (a previous owner re-wired everything with indoor extension cord wire, oy) and your mention of
"main switch turn offs, AC and DC"
puzzles. Is that a reference to my Marine Battery Switch, an existing large dial for choosing between batteries or taking them out of the circuit altogether, or is there some all-electrical-circuits master shut-off switch that ought to be installed as part of the system? I'm imagining some Frankenstein-like giant knife switch. Would be grateful for some illumination (pardon the pun).
Someone suggested if all the switches and mains were turned off. The way my boat (Hunter 27) is setup, I have a dual MAIN AC Circuit breaker (Hot and Ground; normal is just HOT). I also have a main DC / Battery Selector, which can be OFF, B1 BOTH B2, which is also OFF when not on the boat. And I have a DC Switch/Circuit Breaker (Marine quality) for each circuit (Cabin Lights, Running Lights, Steaming Light, Anchor Light, Water Pump). The Bilge Pump is wired direct to a battery (I have two deep cycle and none starting battery. Starting battery not needed for my 8 hp Yanmar diesel, as there are no glow plugs and starts easily).I had a similar sounding event at my home last year. Although there was lightning strike nearby that took down a tree; the falling tree across the power lines caused three successive power surges; you known, off, on, off, on, off, on , offff . .
:snip
It puzzles me that it was only the 12vdc devices that was affected, unless as other say, the EMP got picked up by the circuit boards and fried those.
/ Bob
i got to my boat yesterday and to my surprise i lost almost all of my 12 volt equipment. Items lost: raymarine rc 80 (lights up, shows chart, no data) st 60 depth (no response , no light up), st 60 wind (no light up, no response), st 6000 autopilot (lights up, no button response, says seatalk fail), fm stereo, ac invertor, cell phone charger that was plugged in to lighter outlet. All led lights.
to my suprise my st60 knotmeter lit and responded (shows temp, timer, etc. i didnt go out so dont know if it will show speed), and my vhf radio appears unscathed.
also all my incandesant lighting, pumps, engine control panel, refrigerator seem to work property.
what happened? lightning, power spikes?
are my transducers ok? how about the computer for the autopilot?
will insurance cover this (boat us)?
thanks