I thought people using high current low voltage circuits might like to know this;
a "Big ANL" 300 amp fuse has the same resistance as a 75 mV ammeter shunt. I have wired a 0-200 amp (75mV) ammeter across my 300 amp fuse and it is reading perfectly. Of course should the fuse ever blow so will the ammeter but the fuse costs more than $8 and the ammeter only $2.50 from China (incl. shipping) so no big deal (buy a spare meter).
a "Big ANL" 300 amp fuse has the same resistance as a 75 mV ammeter shunt. I have wired a 0-200 amp (75mV) ammeter across my 300 amp fuse and it is reading perfectly. Of course should the fuse ever blow so will the ammeter but the fuse costs more than $8 and the ammeter only $2.50 from China (incl. shipping) so no big deal (buy a spare meter).