lightning protection - SailNet Community
LinkBack Thread Tools
post #1 of 4 Old 07-21-2003 Thread Starter
Join Date: Mar 2003
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
lightning protection


I''m looking for input for providing a lightning ground. The boat has an encapsulated keel, so there are no keel bolts to attach to.

I''m hearing that pretty much anything that you could attach to the keel could bet blown off is you bond it to the mast, including through hulls.

Any sage advice?

soapstone is offline  
Sponsored Links
post #2 of 4 Old 07-21-2003
Senior Member
Join Date: Dec 2002
Posts: 552
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 18
lightning protection

You might have to either:
Install an external (immersed) ground plate c/w thru-hull bolts (best solution). Gnd plate will be 144 square inches minimum, better a long narrow strip (48" or longer x 3" wide), and NOT sintered.
Utilize a much less effective temporary connection, such as a ground plate connected to a large (2/0) cable c/w clamp to attach to your mast stays or chain plates.
See the excellent articles at:
"Lightning protection of boats and marine facilities"
GordMay is offline  
post #3 of 4 Old 08-06-2003
Join Date: Jul 2003
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
lightning protection

There is a very good thread on the whole subject of lightning strikes on yachts at 1

I certainly learned a lot from it.
salnan is offline  
post #4 of 4 Old 08-07-2003
Join Date: Jul 2002
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
lightning protection

One thing not mentioned when it comes to lightning is that if you are at the dock and are plugged in none of this matters. Just because your mast may become a lighning target does not make it the only targety. A neighbor last week has good lightning protection and grounding on his boat but when a tree nearby was hit it inducted the electric wires. In the process he lost everything electronic in his house as well as every bit of electronics plus the A/C unit in his boat. Insurance estimates are already over $5K in damage.

Your shore power cord is a very problematic connection. Most docks are not surge protected even if well grounded. When your AC power lines are inducted your grounding plate won''t save you from the surge through the shorepower line. Only a heavy duty surge protector will help you then.

Considering many people are at the dock when a storm comes consaider twice before leaving your boat plugged in all the time when you are away.
pblais is offline  

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone using the strikeshield CCSB for lightning protection? e31 Gear & Maintenance 3 07-23-2004 02:03 AM
The Path to Lightning Protection Kathy Barron Seamanship Articles 0 08-13-2003 08:00 PM
Lightning Protection Techniques Kevin Hughes Seamanship Articles 0 08-26-2002 08:00 PM
Lightning Protection irishcajun Gear & Maintenance 1 07-15-2002 06:52 AM
Lightning Protection 101 Sue & Larry Seamanship Articles 0 11-22-1999 07:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome