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RE: How do I determine the fuse current rating for a new amp?

Posted by Tom Bavis (A) on August 5, 2015 at 06:42:21

In Reply to: RE: How do I determine the fuse current rating for a new amp? posted by Tre' on August 1, 2015 at 16:51:41:

Use alligator clips on the probes. Most meters have a separate input for the highest current range (10A on my Fluke 77). Clip the leads to the power switch terminals and plug it in - switch should be OFF so that current goes through meter. 1.2 to 1.5 the running current should be OK for a slow-blow fuse. An inrush limiter like GE CL-80 can reduce the current surge at turn-on.

And don't forget to put the meter leads back to the V/Ohms position when you're done - otherwise you'll blow the meter fuse next time you use it - and those Fluke fuses are EXPENSIVE.

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