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Old 10-06-2019, 19:16   #16
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Re: Earth bonding wires ??

While lightning currents can be large in magnitude their time duration is quite short. To conduct lightning currents with copper conductors is really no big deal. A significant lightning strike might produce a current of 10,000 amps for a millisecond. Electrical systems that carry 3,000 amps for hours exist all over.


What is commonly called lightning protection is not to protect from being struck but to safely conduct the current to minimize damage to structure and nearby occupants. The only way to reduce the probability of being on the receiving end of Thor is to be in the shadow of something taller and made of a better conductor.


Frankly
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Old 10-06-2019, 20:42   #17
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Re: Earth bonding wires ??

Quote:
Originally Posted by Frankly View Post
While lightning currents can be large in magnitude their time duration is quite short. To conduct lightning currents with copper conductors is really no big deal. A significant lightning strike might produce a current of 10,000 amps for a millisecond. Electrical systems that carry 3,000 amps for hours exist all over. ........
Frankly
Yes, this is true, its all about the heat generated in the conductor and that requires time to be factored into the equation.

A simple example is the common fuse - it can carry 10 times (or many more times) of it's rated current for short periods of time without rupturing.
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Old 10-06-2019, 22:19   #18
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Re: Earth bonding wires ??

Thanks all for the responses....I haven't quite worked out how to reply properly on the forum but in any case from your combined wisdom i will leave all those green corroded wires disconnected. She was fitted out in the US originally so that might explain all the bonding wires...pretty sure almost everything is from the original fit-out 35 years ago, no doubt those wires will be doing nothing in my favour

Can i ask further; do i still need the large sacrificial zinc that these bonding wires were previously attached to?
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Old 10-06-2019, 22:30   #19
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Re: Earth bonding wires ??

Hi, yes i met a guy here last summer completing his circumnavigation to....actually cant remember where he lived. But he was friends with the owner of that particular steel passport, it's pictures are on the web somewhere.... and it is impressive!!
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