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January 25, 2010
Adding a New Circuit

 
 


I received a call the other day from a guy who was installing a new overdrive in his truck.  The manufacturer of the of the overdrive sent him a fuse "tap" in order to get power to his new overdrive controls.  He told me a horror story about how the fuse "tap" destroyed his fuse box and how it all could have been averted using a simply OptiFuse product...

Fuse Tap

Fuse Tap

 
Using a fuse "tap" is a very inexpensive method (around $2.00) to pull power from an existing fuse circuit.  But buyer beware!!

Along with the lower price are the several problems that can occur by using a fuse "tap"... 

The first several potential problem is the likely possibility of deforming the fuse clips in the OEM fuse block.  By using the fuse "tap", you also are also increasing the thickness of the fuse blade being inserted into the fuse block.  This additional thickness causes the fuse clips to expand wider than they are suppose to and most likely will lose it good contact with the fuse or even break.  The most likely outcome is that the fuseclip will heat up and potentially cause the fuse to prematurely open.  In certain cases, like the story above, the guy needed to replace his entire fuse box at a considerable cost!

The second major issue is that you’re only using one fuse to protect two circuits.  If you add a 10A circuit to an existing 3A circuit, you will need to use at least a new 15A fuse in order to operate both circuits from the same fuse.  Now if there is a problem in the original 3A circuit, you’ll need at least 20-30A to open the 15A fuse as opposed to 5-6A in the original circuit.

OptiFuse has developed a product that creates solutions both the above problems.  The OptiFuse "Add-A-Fuse" eliminates the need for a fuse "tap" by allowing the user to create a completely new circuits.

In order to use the Add-A-Fuse, you first remove the any fuse in the fuse block, put the original fuse into the bottom slot of the Add-A-Fuse and then add a new fuse in the top slot to adequately protect the new circuit.  Then you just plug the entire assembly into the slot on the original fusebox.

By using the Add-A-Fuse, you do not need to worry about deforming the fuseclip in the original fusebox because the blades of the Add-A-Fuse are the same dimensions of a regular "ATO" style or "mini" fuse.  This eliminates the possibility of problem of the blades being too wide for the fuseclips to accept.

Additionally, since you are using the exact same original fuse as well as an additional new fuse, you don’t need to be concerned about over-fusing the circuit and compromising the protection to the old or new circuits.

The Add-A-Fuse is available in both regular "ATO" style fuses and "mini" style fuses.  The OptiFuse P/N’s are LPR-08 and LPM-08 respectively.

The fuse "tap" might be a cheaper way of pulling power to an add-on device, but then again so was placing a penny behind an old style plug fuse...that is until your house burnt down because the fuse didn’t open...or in your car’s case...when you need to replace the complete fusebox because it no longer works...

Thank you very much for your continued support of OptiFuse where we strive to give you a better way of protecting your assets.



Jim Kalb
President
OptiFuse
jimk@optifuse.com

 
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