SailNet Community - View Single Post - Fusing to the size of the wire....
View Single Post
post #4 of Old 10-05-2012
Senior Member
Join Date: Feb 2010
Posts: 134
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Re: Fusing to the size of the wire....

Originally Posted by MedSailor View Post
I know that you're supposed to choose your fuses to the size of your wire, not the device amperage draw.
Not necessarily. It can be either way depending on the situation. Because of the wire sizing requirements of 12 volt circuits, the wire can typically handle way more current than the load requires.

How much current a wire can safely handle depends on the physical size of the wire, the temperature rating of its insulation, whether its run with other wires and how many, and whether its in an engine space.

In your case, if this circuit is soley for the heater, I would size the fuse for the load of the heater which is far less than #8 or #6 wire can safely handle.

fairbank56 is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome