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Author Topic:   6 Amp Fuse
TomB posted 02-09-2006 09:12 AM ET (US)   Profile for TomB   Send Email to TomB  
I just installed a Phantom PS1000 in my Montauk. The manual specifies a 6 Amp 250 Volt fuse. The Blue Seas panel I have uses AGC fuses. So far I have been unsuccessful in finding any. Where I live, auto parts stores, Radio Shack, even the closest West Marine store don't stock them. They jump from 5A to 7.5A. I can order them online, but am just curious why Standard Horizon would spec such an unusual size. Is it a requirement just unique to VHF equipment? Just curious.

Tom

Bulldog posted 02-09-2006 11:35 AM ET (US)     Profile for Bulldog  Send Email to Bulldog     
Tom, send me an e-mail with your address I'll get some out to you tommorrow! I'll send you some AGC 6 made by Cooper Bussman, made in the good old USA!......Jack

PS: Where to get them? Where all us electricians get there stuff... Electrical supply houses such as Graybar.

Chuck Tribolet posted 02-09-2006 12:38 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
7.5A would work just fine.

Remember that the fuse protects the wireing and the boat, not
the equipment.


Chuck

TomB posted 02-09-2006 01:07 PM ET (US)     Profile for TomB  Send Email to TomB     
Thanks Jack and Chuck..I bought some 7.5A while in West on the chance they would work. In fact, I have a 5A temporarily in it right now because the 6A packed with the unit was not good.

Tom

Jerry Townsend posted 02-09-2006 03:53 PM ET (US)     Profile for Jerry Townsend  Send Email to Jerry Townsend     
Tom - try the auto parts stores in your area. Normally they carry a good selection of buss fuses. --- Jerry/Idaho
Bulldog posted 02-09-2006 04:19 PM ET (US)     Profile for Bulldog  Send Email to Bulldog     
Tom, the 5 is fine for testing, but you are talking about a life safety piece of equipment , replace the 5 with a 6 , 7 or 7.5 amp.before heading out on the water and maybe needing that radio in an emergency. Let us know how the radio works out, seems like great design....Jack
TomB posted 02-10-2006 03:54 PM ET (US)     Profile for TomB  Send Email to TomB     
Thanks for the replies..The 5A was just to set up and test the unit. I have a 7.5A in it now until the 6A's I've ordered come in. I'm still curious, though, why Standard Horizon determined 6A was the best size to spec.

Thanks...
Tom

Bulldog posted 02-10-2006 04:17 PM ET (US)     Profile for Bulldog  Send Email to Bulldog     
Fuse is probably sized at about 125% of normal load, the radio might draw about 4.8 amps. If something such as water or a bad componet causes an excessive draw of over 6 amps, the fuse will open saving the radio from total failure and also protecting the boat wiring. Another example, using an on board battery charger protected at say 8 amps, if you have a low battery and have the charger on line and try to start the engine, the current flow through the charger would fry it unless the fuse opens. I know from experiance on that! I leave you with this note on fuses...There is no such thing as a bad fuse, there are good fuses and fuses that have worked good already, but there is such a thing as a bad circuit breaker!...Jack
TomB posted 02-10-2006 06:32 PM ET (US)     Profile for TomB  Send Email to TomB     
Thanks, Jack...I'm still way down the learning curve on electrical, but am fascinated by it. You got me. When I said that 6A was not good my common sense was trying to tell me it was blown for a reason. I did go back and check all the wiring before I powered it up. So far so good.

Tom

Chuck Tribolet posted 02-10-2006 07:37 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
5A might even work for a while, until you keyed the mike and
had a long-winded speach. If you slightly overload a fuse,
it doesn't go instantly. 25 watt radios on transmit pull
around 5A.


Chuck

Loafer posted 02-16-2006 01:31 PM ET (US)     Profile for Loafer  Send Email to Loafer     
The fuse may have popped if someone reversed the lead polarity. Usually they put a diode across + and - that shorts the fuse if you screw up on the installation. BTW, that’s an easy mistake to make (I’ve seen a pro installer do it), and it’s SUCH a relief to find you’ve smoked the fuse and not the unit...

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