don't you need a know load to measure amps? I thought you had to add a load to the circuit, such as a light bult, break the circuit and measure the current in line with the load... Does this make sense?
Don
Yes thats how its done.. Unless you are absolutely sure that the current you are trying to read is less than the rating on the fuse.
For instance i've hooked my Ammeter directly across my alternator output many times ,But each time i made sure that the current was not high enough to blow the fuse..
the fuse in my meter is rated at 10 Amps.
and then of course there have been other times when i've mistakenly had the meter on Amps and touched 120V at the breaker box , a brief spark , and a little fused metal on the meter leads ,and some time to calm down from the Whoa ! , but thats what the fuse is for, to protect the meter.
However a fuse will not protect you from your own (my own) carelessness.