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13 June 2011, 16:43
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#1
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Member
Country: UK - England
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6.3 amp spade fuse
I can't seem to find a 6.3 Amp spade fuse to go in an inline holder.
All I can find is these: Quick Blow Ceramic Fuse 6.3A 20mm x 5mm 6.3 Amp x 5: Amazon.co.uk: Electronics
Any help is much appreciated.
Thanks
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13 June 2011, 16:54
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#2
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RIBnet admin team
Country: UK - England
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Quote:
Originally Posted by maxhar
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Spade fuse? Try Halfords
Is there a reason it has to be exactly 6.3 amps?
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13 June 2011, 17:11
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#4
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RIBnet admin team
Country: UK - England
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What's it going in?
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13 June 2011, 17:12
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#5
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Member
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What do you mean? My console?
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13 June 2011, 17:14
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#6
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Member
Country: UK - Channel Islands
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I wouldnt use that fuse holder or that fuse.
Something like this would be much better:
In-Line Waterproof Fuse Holder - FUSH
This one takes standard blade fuses
It doesn't need to be exactly 6.3A, a 5A or even 7.5A would be fine
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13 June 2011, 17:14
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#7
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
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Quote:
Originally Posted by maxhar
What do you mean? My console?
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Sorry, moored or trailered and how dry is it inside your console?
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13 June 2011, 17:18
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#8
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I'd say it is quite dry inside the console. It's a trailered boat so not exposed to any really harsh weather.
Martini, I thought the point of a fuse was to protect the equipment if there was a too high current delivered. I was under the impression that anything above 6.3 amp would damage the radio.
If that's not the case then yes, your link looks a much better option. Thanks.
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13 June 2011, 17:23
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#9
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Member
Country: UK - Channel Islands
Town: jersey
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Quote:
Originally Posted by maxhar
Martini, I thought the point of a fuse was to protect the equipment if there was a too high current delivered. I was under the impression that anything above 6.3 amp would damage the radio.
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The equipment will take whatever current it requires. If it malfunctions and creates a short circuit then you'll get excessive current, enough to melt the wires. So the fuse needs to be big enough to carry the normal current being used but small enough to blow before damage is caused to the wiring or anything else in the circuit.
ps that link was just from googling, I'm not endorsing the company. You should get everything you need from your local Halfords/Maplin etc store
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13 June 2011, 17:31
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#10
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Member
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Ok. Thanks for that. I'm going to go for a 5 amp mini spade fuse in a waterproof holder.
Can you confirm that Tinned thinwall cable is ok to complete the circuit on the -ve side?
VWP - thinwall cable
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13 June 2011, 17:36
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#11
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Member
Country: UK - Channel Islands
Town: jersey
Boat name: Martini II
Make: Arctic 28/FC470
Length: 8m +
Engine: twin 225Opti/50hp 2t
MMSI: 235067688
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Quote:
Originally Posted by maxhar
Ok. Thanks for that. I'm going to go for a 5 amp mini spade fuse in a waterproof holder.
Can you confirm that Tinned thinwall cable is ok to complete the circuit on the -ve side?
VWP - thinwall cable
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The 1.5mm sq should be fine
Don't forget to solder all the connections and use adhesive lined heat shrink
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13 June 2011, 17:40
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#12
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Member
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I'm going to get some japanese bullet connectors as here for the ends.
VWP - non insulated bullet & socket terminals
Thanks for the help
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13 June 2011, 17:43
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#13
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Member
Country: UK - Channel Islands
Town: jersey
Boat name: Martini II
Make: Arctic 28/FC470
Length: 8m +
Engine: twin 225Opti/50hp 2t
MMSI: 235067688
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Posts: 3,030
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Next best thing I spose - stick some vaseline in 'em before you plug them together
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14 June 2011, 17:04
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#14
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Member
Country: USA
Town: Oakland CA
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Quote:
Originally Posted by maxhar
Ok. Thanks for that. I'm going to go for a 5 amp mini spade fuse in a waterproof holder.
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Check your VHF's manual, and see what the max current draw is. If it came with a 6.3A fuse, there is a chance that 5A may blow when transmitting on high power. You should probably go a step up rather than down (small chance of exceeding current rating of wiring, but if it handles 6.3A it will most likely handle 7 or 8.)
jky
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14 June 2011, 17:34
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#15
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Member
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Quote:
Originally Posted by maxhar
Martini, I thought the point of a fuse was to protect the equipment if there was a too high current delivered. I was under the impression that anything above 6.3 amp would damage the radio.
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Fuse are to protect cables & circuit devices, not the connected equipment.
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14 June 2011, 18:05
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#16
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
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Quote:
Originally Posted by Pikey Dave
Fuse are to protect cables & circuit devices, not the connected equipment.
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That's my take on it too. If your equipment is drawing enough power to blow a fuse that the manufacturer supplied,it's already trashed-but you really don't want a wiring fire.
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14 June 2011, 18:11
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#17
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Member
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Quote:
Originally Posted by Pikey Dave
Fuse are to protect cables & circuit devices, not the connected equipment.
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Oh Contrae You have never seen a connected equipment burst into flames because of a fault and over rated fuse fitted then ![eek](https://www.rib.net/forum/images/smilies/eek.gif) ![eek](https://www.rib.net/forum/images/smilies/eek.gif)
38 Years in the electronice industry and have seen this a hand full of times !!
Oh and a 6.3 amp fuse is a non standard Value so as has been said check total current draw on Max (25w) RF output and go for the closest value higher..
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14 June 2011, 18:37
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#18
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Member
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Fuse size is determined by current rating of cable. The fuse is there to blow (melt) before the cable does. A correctly designed circuit will withstand the potential fault current of the connected load & the fuse will blow before the circuit i.e. wiring catches fire. Thus disconnecting the faulty equipment from the supply. Electronics usually have an internal fuse or protective device e.g a thermal.
I'm sure someone will be along with the popcorn shortly
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14 June 2011, 18:43
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#19
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Member
Country: UK - England
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14 June 2011, 18:51
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#20
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Member
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Quote:
Originally Posted by ashbypower
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So are you saying that each item of electrical equipment should be supplied radially on individual fuses to suit?
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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