Bussmann Series 16 Gauge Add-a-Circuit for ATM/MINI Auto Blade Fuses, BP/HHH-RP-WM

works good

Besides being simple and having a neat appearance, these eliminate the short unfused wire leading to a usual in-line fuse when adding a circuit. Note that the max current rating is 10 amps. This doesn't apply to the existing circuit that you are tapping into, just the added circuit. The lower fuse powers the existing circuit, so fuse it at whatever it was. 1. Find a place this will fit in your panel 2. Pull out the existing fuse and put this device in its slot 3. Put that existing fuse, or one with the same rating in the lower slot 4. Connect the wire to the positive terminal on the new device that you're adding Find a good ground connection for the negative terminal on your new device 5. When you're ready to power up your newly added device, plug a fuse in the upper slot This must be sized for the new device, and no more than 10 amps 6. If it doesn't power up, turn the add-a-circuit around in the slot This is made for ATM-type fuses, but it will fit in a low-profile fuse slot if there is enough headroom to fit under the cover. You will have to use ATM-type fuses in this device, low profile won't fit it. I recommend this handy little gadget, but only for 10 amps or less, and only if there is room to replace the cover on your fuse panel. It's up you to find a good route for the positive wire without allowing dirt and moisture into the fuse panel.