Outer Limits 4x4 Board

What is the practical difference between these?

I noticed that on a VN Commo fuse block, in the engine bay, there's a fusible link (40A) for headlights, and then there are low and high beam blade fuses as well. This is a puzzle to me as I can't think of a reason to have both.

Just wondering where you would use which, and why. I always got the impression that fusible links tended to be used for 30+ amps, and fuses for less, but that doesn't seem to be the whole story.

Anyone got some tips on this?

Jason

Fusible kinks take longer to blow than fuses and are better for high start up currents, ie all lights would be one one fusible link, with individual fuses to protect the individual wires.

So 2 x 100 watt high beams + 2 65 watt high beams + parking lights at 4 x ~20 watt, would be run off the 40 amp fusible link, with individual lower rated fuses protecting the "tentacles" of the loom in the event of a short whilst not adversely affecting the rest of the lighting. The cold current of the high beams (easily double the hot current) would probably stress a similar rated fuse in that situation to the point of failure after a few cycles.

Fusable links , whether wire type or cartridge type ptotect a specific system such as lights , aircon , etc.

Fuses protect the individual devices on the particuliar circuit , say lights , fused rear lights , fused low beam , fused high beam , etc.

Hope that helps , Cheers Paul.