Thread: Cable temp
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Old 07-19-2016, 03:10 PM   #9
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GoneFarrell's Avatar
City: La Conner, WA
Country: USA
Vessel Name: Imagine
Vessel Model: Farrell 34
Join Date: Oct 2015
Posts: 240
Ken or Dave,
Have you ever seen calcs for fault currents on boat cables to/from battery banks?
I haven't. Maybe they are different because of battery voltage drop at near-shorted condition. But that can be a lot of heat in the batteries and cables too.

We used to have to check that for some of the industrial circuits I worked on because too big a cable can lead to fault currents that circuit protection couldn't interrupt. Part of balancing ampacity/voltage drop and sizing circuit protection devices.

I've seen a few pics of burned-out battery banks and boards that bring this to mind.

Of course, after hitting "send" I googled "battery fault current calcs". There's a lot of good stuff there!
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