View Single Post
  #2   IP: 104.174.83.118
Old 08-09-2021, 03:30 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,619
Thanks: 198
Thanked 2,208 Times in 1,425 Posts
With the speed at which that occurred (2~3 months) my thoughts go immediately to stray current corrosion.

Questions:
  1. Is his keel grounded?
  2. Does your friend have shore power?
  3. Is he slipped near other boats?
  4. Does his shore power system have an AC-DC ground bond?
  5. Does his shore power have a galvanic isolator?
  6. Is his shore power main switch an ELCI?
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
The Following User Says Thank You to ndutton For This Useful Post:
Graham (08-09-2021)