fuse popped, ARRRG - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 3 Weeks Ago
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,145
Thanks: 52
Thanked 89 Times in 79 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
fuse popped, ARRRG

All the rewiring I did as many of you may remember? Well the cube fuses seemed ok. I wasn't overly impressed with them. Anyway. The fuse for the starter on the engine battery burned out. 125 amp, terminal loosened up "again" . with lock washers that was the cause. Any way... the new terminal is all green on the cable so I'm going to replace it with new one and get better washers on the cube terminal and go to 150 amp for the starter. I'm really tempted to leave it out. since that is what had to be done to use the engine battery again.

So it also dawned on me I need the batteries combined so the solar trickle feeds them all? (Blue Seas Isolated battery circuits switch, with acr)
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

my current "project"!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 3 Weeks Ago
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,349
Thanks: 11
Thanked 121 Times in 89 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: fuse popped, ARRRG

Quote:
Originally Posted by deniseO30 View Post
All the rewiring I did as many of you may remember? Well the cube fuses seemed ok. I wasn't overly impressed with them. Anyway. The fuse for the starter on the engine battery burned out. 125 amp, terminal loosened up "again" . with lock washers that was the cause. Any way... the new terminal is all green on the cable so I'm going to replace it with new one and get better washers on the cube terminal and go to 150 amp for the starter. I'm really tempted to leave it out. since that is what had to be done to use the engine battery again.

So it also dawned on me I need the batteries combined so the solar trickle feeds them all? (Blue Seas Isolated battery circuits switch, with acr)

Denise a 125A or 150A amp fuse for a starter load is a JOKE!!!! You really need 250-300A and at the smallest 200A bare minimum.... What size is your wire?

Beyond that use a nylock with the MRBF with the nylock on top of a split washer.

ANY BATTERY THAT CAN BE CALLED UPON TO EVER START A SAILBOAT AUX DIESEL NEEDS A MINIMUM 200A FUSE, BUT PREFERABLY 250-300A TO AVOID NUISANCE TRIPS....!

Once you get the right fuse in there you will have many thousands of starts and will completely forget the fuse is even there.
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
  #3  
Old 3 Weeks Ago
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,620
Thanks: 2
Thanked 88 Times in 86 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: fuse popped, ARRRG

And if you have no silicon grease to schmear on the fittings to prevent them from turning green, you can always use chicken schmaltz.

With any leftover chicken schmaltz, you can make chopped liver.
Reply With Quote Share with Facebook
  #4  
Old 3 Weeks Ago
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,224
Thanks: 2
Thanked 36 Times in 36 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: fuse popped, ARRRG

I went with the 300A fuses for my Universal 5424. The cabling is 00, so according to the table my fuses are just about small enough to protect the cabling. 00 is rated for 280A continuous inside an engine space. I think I read you are allowed a certain rating over the continuous rating, when selecting fuses. Mainesail, do you know what that percentage is?

"the new terminal is all green on the cable". Does this mean the conductors are not tinned?

Genuinedealz.com will sell you nice cables, terminated, with tinned marine-grade wire. That's what I use, and the price was less than the bare cable at my local chandlery.
__________________
1984 Bristol 31.1
Alameda, California, USA

Last edited by MarkSF; 3 Weeks Ago at 05:43 PM.
Reply With Quote Share with Facebook
  #5  
Old 3 Weeks Ago
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,145
Thanks: 52
Thanked 89 Times in 79 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Re: fuse popped, ARRRG

Hides behind sofa and softy says; "weeeell I wanted to size them closer to the load"
# 4 marine battery cable only about 4ft to starter. It's only a little 2 cylinder engine.

the terminal was loose enough to rattle. they make copper nylocs?
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

my current "project"!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #6  
Old 3 Weeks Ago
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,224
Thanks: 2
Thanked 36 Times in 36 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: fuse popped, ARRRG

I used to have 4 gauge cabling. It starts with a lot more enthusiasm, now it has 2/0.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Share with Facebook
  #7  
Old 3 Weeks Ago
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,145
Thanks: 52
Thanked 89 Times in 79 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Re: fuse popped, ARRRG

Quote:
Originally Posted by MarkSF View Post
I used to have 4 gauge cabling. It starts with a lot more enthusiasm, now it has 2/0.
Well #4 can handle 136 to 160 amps load, and more on the surge
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

my current "project"!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #8  
Old 3 Weeks Ago
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,349
Thanks: 11
Thanked 121 Times in 89 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: fuse popped, ARRRG

Quote:
Originally Posted by deniseO30 View Post
Hides behind sofa and softy says; "weeeell I wanted to size them closer to the load"
# 4 marine battery cable only about 4ft to starter. It's only a little 2 cylinder engine.

the terminal was loose enough to rattle. they make copper nylocs?

What "load"? You do know a starter can draw many times it's "rating"... I have measured a 1.2kW starter at 640A during the in-rush... I have measured a 1.4kW at over 1000A in-rush. ANL, MRBF and Class T can handle brief in-rush but still need to be sized well in excess of the kW rating.. On a warm day with healthy battery & wiring you might see just 2X the rating but as the battery gets weak, marginal cable of cold temps etc. the starter load can go up..
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
  #9  
Old 3 Weeks Ago
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,145
Thanks: 52
Thanked 89 Times in 79 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Re: fuse popped, ARRRG

load From the new 90am alternator. the terminal was loose for the starter! Could of burned, glad the fuse went
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

my current "project"!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #10  
Old 3 Weeks Ago
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston Area
Posts: 3,518
Thanks: 110
Thanked 61 Times in 60 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: fuse popped, ARRRG

Hi Denise,

You should size the MRBF to the location, wire gauge and insulation temperature rating. I have AWG 2 leads with 105ļC insulation going to my batteries, and this is inside the engine room, so for me the proper size fuse for me is 178.5A - call it 175A.

Look at the table below, and find your wire gauge, then find the insulation, and read what should be your fuse rating.
(Posting this image from Maine Sail's site);


[EDIT] If sized too small, you WILL blow fuses as your battery voltage drops. You know that the voltage will drop as you spend a night at anchor, and use the batteries. Voltage down means current up to produce the same power to the starter motor.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems

Last edited by eherlihy; 3 Weeks Ago at 09:12 AM.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Arrrg deniseO30 Electrical Systems 9 04-15-2014 10:16 AM
Freeze-out plug popped out. Barquito Atomic 4 5 11-23-2013 07:02 AM
Popped freeze plug in Yanmar 3gm BKL Diesel 4 05-18-2012 06:52 AM
Fuse size for fuse panel? SanDiegoChip Electrical Systems 34 10-31-2010 12:22 AM
I popped my cherry today... Coreyboy18 General Discussion (sailing related) 20 01-10-2009 05:54 PM


All times are GMT -4. The time now is 12:07 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.