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ContinuousWave: Small Boat Electrical
Source for blade fuse block *without* common positive supply
|Author||Topic: Source for blade fuse block *without* common positive supply|
posted 04-16-2007 09:55 PM ET (US)
I am looking for a fuse block with the following specifications:
-- ATO / ATC Blade fuse
Blue Sea makes blocks that are a close fit to these specifications, but all seem to have a common positive bus.
Any thoughts on a source?
posted 04-16-2007 10:03 PM ET (US)
The reason the fuse block has a common positive source is that the fuse should be located close to the source of the voltage so that it protects the wiring in the branch circuit. If you want a fuse to protect an individual device, install a fuse on the device or wire on in-line on the power cord attached to the device.
posted 04-16-2007 10:06 PM ET (US)
So no such thing exists?
I would like to centeralize things and avoid a mess of scattered in-line fuses.
posted 04-17-2007 12:22 AM ET (US)
I'm not seeing why a common supply is a problem.
posted 04-17-2007 06:49 AM ET (US)
I have several circuits with unique power supply scenarios such as power all the time regardless of the battery switch position.
I would like to avoid a number of in-line fuses to handle these few cases. Interestingly, there are a number of blocks without a common positive supply but they are all 3AG type. Since the rest of my system uses ATO fuses, I'd prefer to shy away from 3AG.
The closest I've found so far is http://www.gizmos-gadgets.com/product_info.php/cPath/7_32/products_id/ 395 However, I am not thrilled with the lack of screw terminals here. If anyone knows a source with blade terminals I would appreciate the guidance.
posted 04-17-2007 08:00 AM ET (US)
If you have only a couple of power supply scenarios, you
can cut the power bus on the Blue Sea fuse block. I did it
because I have a Humminbird SureVolt (puts out 13.8V even
if the battery is pulled low by the starter) that runs some
of the accessories. IIRC, you could only cut it once, and
I'm not sure Blue Sea would approve.
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