Help pls ! - fuses / fuse holders

[103Alex1]

Hi.

Slight tearing out of hair moment trying to find fuse holders rated for 36V supplies (pref waterproof).

I have some like this for use with lights which I intend to install after DC-DC converters in feeds to charger outlet sockets / lighting supply wires, which I hope are OK ? :

5 amp mini Blade In-Line Fuse Holder / Fuseholder 5AMP Car van boat waterproof | eBay

... however if you look at the specs these state they are only rated for 32V DC and therefore I don't know if they are OK to use as inline fuse holders on supplies to a 36V light where the internal buck converter must be after the fuse as that's how the light is designed.

Can anyone please help ? Obviously in supplying a light, current would never be anything like 30A - much more likely 1-2A max. But the supply voltage of that particular light is from 36V battery so guessing input voltage to light 36V.

I have also got one of these to use as inline fuse and holder for the main battery to controller power supply line (36V battery / 30-32A controller). It's rated to 150A and I got a couple of 40A fuses for it, so hope it is OK. Is this the sort of thing other people have been fitting ?

MIDI fuse holder MAX- 150 Amp rating ALT FH560

Finding anything rated over 30A / 32V in a regular style inline fuse holder like the one first linked above isn't easy

 

[Deleted member 4366]

Voltage isn't important. You only need to look at the amps.
here's a fuse-holder:
2 x SPLASHPROOF INLINE 40amp RATING STANDARD BLADE FUSE HOLDER ATO CAR AUTO | eBay
Fuses:
10 x 40 AMP STANDARD BLADE FUSES CAR ATO ATC FUSE AUTO | eBay

Get a piece of black thick wire (30amps plus); lay it alongside the fuse-holder; solder male and female Deans connectors to each end - convention is the vertical spade has the red wires (+). You can cut the wires on the fuse-holder fairly short to save space.

 

[jackhandy]

Deans connectors to each end - convention is the vertical spade has the red wires (+). You can cut the wires on the fuse-holder fairly short to save space.

You've just reminded me that I have been meaning to ask that very thing:

Is (+) the vertical spade with the connector horizontal?

 

[Deleted member 4366]

Yes.

Normally, it doesn't matter if you put all the connectors on yourself, as long as they're all the same way, but if you buy any proprietary items with Deans connectors already fitted, like a charger, battery or watt-meter, something will go pop. With all these things, it's best to follow the convention, then you can always check that connectors have the correct polarity.

 

[Old_Dave]

I use these stackable ones.. solder and heat shrink the ends, stick in a suitable amp fuse for the application (or you can just use crimp connectors onto your wires, if you can do crimps)

2x In Line Blade Type Fuse Holder upto 30A | eBay

 

[Scimitar]

I use these, from 12V up to 80V.
30 amp ATO Blade In-Line Fuse Holder / Fuseholder 30AMP | eBay

 

[103Alex1]

Thanks a lot. I'll be able to get fuses installed for everything with a mix of all those by the looks of it

Just another thing which I didn't quite understand ... I'll be using a bunch of DC-DC converters, most likely one converter for each relevant accessory barring the front CREE & rear lights which will be on a Y-split after the single 36V to 9V 3A voltage step-down converter for these two.

I seem to remember being advised to put a switch across every DC-DC converter. Not sure that's going to be realistic especially as 2 of them will be inserted after a handlebar switch - one into each of 2 different supply wires from the handlebar switch corresponding to different connections activated by different switch settings. In my head the DC-DC converters are simply an inline converter necessary to supply the end function (be it phone charger or light) at the correct voltage.

So not sure why the DC-DC converter itself needs a switch - does it draw loads of power when idle or something ?

 

[Fordulike]

For a regular cylindrical fuse type, I've been using one of these running 52v @ 30A.

Halfords | Halfords Sealed Fuse Holder

Ignore the customer (monkey) review, as it's actually a pretty good fuse holder, robust and waterproof.

 

[jackhandy]

Yes.

With all these things, it's best to follow the convention, then you can always check that connectors have the correct polarity.

Happiness!

I followed the way my watt-meter was configured when I put deans on my bikes & bits, but didn't think to check convention:

I also put the female (socket) on the hot lead, but I expect everyone does that (after the first flash-bang, anyway).