Not in my opinion, I did not see the need as like you additional loads over stock are cabled and fused direct from the battery.I upgraded the cable from my alternator to the battery.
I haven't changed cable from alternator to engine bay fuse box. I don't see the loads here as having changed as any accessories are drawing load from the battery through fused circuits.
If the 100amp fusible link rating is upgraded, is there any need to increase cable size to the engine bay fuse box?
Regards
Dave
