×

Sale ends todayGet 30% off any course (excluding packages)

Ends in --- --- ---

sizing wires and fuses

Practical Motorsport Wiring - Club Level

Forum Posts

Courses

Blog

Tech Articles

Discussion and questions related to the course Practical Motorsport Wiring - Club Level

= Resolved threads

Author
1203 Views

when we are designing the wiring harness shouldn't be worried about the voltage drop across the wire...if we have selected a wire and for it's length and the current it draws , has a large voltage drop (lets say 0,5+ volt) shouldn't be aiming for a larger wire ?? and what about the sizing of a fuse, what is the safety factor we apply to the peak current to choose the right fuse size..??

You can calculate a wires resistance from it's diameter and length, but most of this work has been done for us. Just google "wire size" and click on images. Literally hundreds of charts are already done showing voltage drop over length for a given wire, and recommended current for a given wire.

If you are getting a 0.5v drop, then go for a bigger wire yes.

A fuse could be sized by max current x 1.25 as a rough suggestion.

We usually reply within 12hrs (often sooner)

Need Help?

Need help choosing a course?

Experiencing website difficulties?

Or need to contact us for any other reason?