replacing 10 amp with 15 amp fuse
Thread Starter
Burning Brakes
Joined: May 2019
Posts: 765
Likes: 182
replacing 10 amp with 15 amp fuse
Alpine head unit and I'm adding the KTP-45A amp. says to use 15 amp fuse. Since it connects directly to the radio, can I just replace the 10 amp radio fuse with a 15 amp?
Thread Starter
Burning Brakes
Joined: May 2019
Posts: 765
Likes: 182
Funny thing is..looks like all the wire sizes for 10 and 15 amp circuits are the same..i bet it wouldnt matter
Same as going to 20 amp breaker in your house.
But ill try using the unused wire in the footwell
Same as going to 20 amp breaker in your house.
But ill try using the unused wire in the footwell
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
Assuming a 25% headroom, the radio circuit with a 10A fuse could normally be drawing up to 7.5A. The amp calling for a 15A fuse could be expected to draw around 11.25A. Therefore, connecting both, radio and amp, together on the same circuit would mean a current of 18.75A, which not only is almost double what the original circuit was rated for, but is above the new 15A fuse.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Le Mans Master
Joined: Jul 2004
Posts: 6,228
Likes: 698
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
opinion based on the information at hand. It was meant for a headunit requiring a 10A circuit and an additional amp requiring a 15A circuit.Just out of curiosity, I looked for more information regarding this specific device. It is an add-on amp specifically designed to complement the same manufacturer's headunits, and it is inserted "in-line" with no independent connections. Its harnesses and connectors are designed to mate with the headunit's, and what's more important: the recommendation to use a 15A circuit is intended for both, headunit AND amp as a combo.
That changes everything. There's no need to look for a separate 15A circuit just for the amp. It's simpler to do it as per the diagram above and, as mentioned in the quoted posts, probably it will never blow the 10A fuse because of the headroom that's built-in in the manufacturer's recommendation (specially at moderate levels).
For peace of mind you could take a reading of the current it drives during normal operation before deciding to keep the 10A fuse or bump it up to 15A.
Last edited by GCG; Jul 2, 2019 at 11:32 AM.
Thread Starter
Burning Brakes
Joined: May 2019
Posts: 765
Likes: 182
Well..i cut the wire already and found the wires cut to the aux port in the centrr console..think ill tap into that and see..i sometimes tend to crank it up to overcome the top down..metallica is a fuse blower for sure..