Current measurements thru main fuse, fuses, total current from battery to operate x,x,x,x,x Options

[Tom]

Been meaning to get this done and finally got around to it today. Wanted to make sure a 30 amp ATC style fuse would handle a 35 amp load without overheating the fuse holder and/or blowing.
Fuse was in-line with the 4 red wires from the battery. Ran 36.85 amps thru it for 15 minutes and removed to check the fuse. barely warm.
Following are the results I got.
engine running - 6.0 amps
add radio - +1.1 amps
add high beams - +10.6 amps
add fog lights - +9.4 amps
add emergency flashers + 5.25 amps
add wipers - + 4.5 amps
Total 36.85 amps
My fresh air blower is not working and my heater blower is not installed but seperate testing on the heater blower was about 5 amps. I would expect the fresh air blower is about the same. Those with high output stereos would see more than my simple radio.
I don't know how often one would have everything on at the same time, but some who purchased fuse block kits may be interested to know these results, especially those with the early cars that only have one large wire going to the front fuse panel area.
Tom