Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  6 Amp Fuse

Post New Topic  Post Reply
search | FAQ | profile | register | author help

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.


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.


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.


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.


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.


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.


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...

Post New Topic  Post Reply
Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.