Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker) - 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 Tree2Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 10-30-2012
Junior Member
 
Join Date: Oct 2012
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ns22simple is on a distinguished road
Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

My Nonsuch 22 has a simple 3 breaker DC panel. The marina I am in has 30A shore power connections. I would like to use a 30A (male) X 15A(female) adapter to supply my battery charger via a commercial grade temp power cord with a GFCI similar to Levition's 69591-W25. I would like to install an in-line breaker after the 30AX15A adapter since the rest of the system is sized for 15A. Does anyone know of a suppiler of 15A in-line breakers that can be used installed in a temp power cord?

Thanks!
Nonsuch 22 "Simple"
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 10-30-2012
asdf38's Avatar
Senior Member
 
Join Date: Jul 2010
Posts: 724
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 5
asdf38 is on a distinguished road
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

So you need to build a custom adapter? Does anyone sell these?

I've never heard of inline breakers but inline fuses are common. Consider going with a fuse instead with a breaker in your boat. It's fine to have them in series but if they're rated for the same thing there is no way to guarantee which will blow first - you'd want it to be the breaker.

In general for marine electrical start your search with Bluesea. I don't have AC on my boat but did a rewire using tons of Bluesea stuff. It looks like they have a full line of AC breakers but I don't think you'll find inline ones anywhere.

Circuit Breakers*—*Blue Sea Systems

Also search www.digi-key.com
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 10-31-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,280
Thanks: 0
Thanked 77 Times in 68 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

This might help : Hubbell Adapter HBL105GF 15A-Adapter Hubbell
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 10-31-2012
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 9,450
Thanks: 10
Thanked 155 Times in 141 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

When you say the "rest of the system", I may be misled to thinking there is more going on there.

Is it this simple? You want to temporarily run an extension cord from the dock, which has a 3 prong 30a outlet to a portable battery charger that has a standard household plug?

If so, I don't think I would worry about converting the 30a to 15a protection. Your charger itself should have a fuse. I would get a heavy duty extension cord (12g min, but prefer 10g), and a pigtail adapter for the power pole. If this is your plan, you shouldn't leave it plugged in unattended, regardless of how you fuse the line.
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 10-31-2012
asdf38's Avatar
Senior Member
 
Join Date: Jul 2010
Posts: 724
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 5
asdf38 is on a distinguished road
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

The only issue I see is that the 3 prong connector isn't rated for 30A so without an internal fuse the adapter isn't safe. If ns22simple isn't concerned with that, and I'm not sure I would be, then I agree, just do it and trust the charger and/or breaker in the boat.

EDIT, the 10 or 12 awg wire is a good idea, but wouldn't technically take care of the connector issue.

Last edited by asdf38; 10-31-2012 at 09:03 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 10-31-2012
hellosailor's Avatar
Senior Member
 
Join Date: Apr 2006
Posts: 10,864
Thanks: 2
Thanked 100 Times in 97 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

"The only issue I see is that the 3 prong connector isn't rated for 30A"
So what? If it is connected to a system that can only draw 15A, it will never be exposed to more than 15A. that can be ensured by fitting a 15A protection device on *either* side of the 15A connector, as long as it is in the AC main line so that all current has to flow through it, just as it all flows through the connector. A breaker in this application would probably provide less protection than a fuse, simply because it is easier to find "fast blow" fuses that tolerate less overload for less time.

If the power adapter is going to be used only for the direct connection to supply power to the battery charger, and the battery charger already has a 15A fuse in it, then nothing more is needed. Although I'd add a GFI to the power cord unless the marina's power outlet already has one built in. (And even then, buy one to use at marinas that don't.)
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 11-01-2012
asdf38's Avatar
Senior Member
 
Join Date: Jul 2010
Posts: 724
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 5
asdf38 is on a distinguished road
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

Hello,

To be clear, in this scenario, as I said, I don't think it's a big deal. But as a general principle, you always fuse when stepping down to lower capacity conductors and that's what's happening here. For example, as you well know, it's not ok to run a 16awg wire off your battery and fuse it 20' away. That leaves 20' of fire hazard regardless of the load attached - it's not unsafe for it's intended use, but it's unsafe for UN-intended shorts. In this case, the connector itself and any 15A extension cable is equally exposed. Is this a big danger? No not really, but the principle is what I was trying to get at. Also it seemed like the OP knew this and just wanted to do it right.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 11-01-2012
hellosailor's Avatar
Senior Member
 
Join Date: Apr 2006
Posts: 10,864
Thanks: 2
Thanked 100 Times in 97 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

I agree. The simple analogy is that this is a household extension cord same as you would use for a tv or floor lamp. You don't install a fuse in the extension cord, there's one in the mains to protect the wall, and sometimes one in the end device, but never one in the cord itself. (Not in conventional cords anyway.)

Of course I know firemen who will say that overloaded extension cords cause fires every day, but that's not this limited use.
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 11-04-2012
Senior Member
 
Join Date: Sep 2009
Location: Kingston Washington
Posts: 509
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 6
Waltthesalt is on a distinguished road
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

I installed a 15 amp shore power system. It's all I need and works just great. Found a 15 amp marine shore power box in a consignment store. Regrettably I don't think they're made any more. I got a used 30 amp cord with a broken boat-side end... cheap, and put on a 15 amp end that fit the power box. that feeds two breakers sized for a 15 amp system and by trial and error the lowest that allowed me to run my power drill. One breaker for each wire. They are ganged together so that if one trips the other does as well. I found a design for a galvanic isolator using a diode bridge and built one that carries the ground wire. You have duplicate bridges in case one faile. Remember the isolator diodes have to be able to carry the max circuit current. I ordered mine on-line.
You need the breakers as the 30 amp shore power breaker on the power pole. On thing I did was to mount the power box inside the boat and bring the cable thru a head port. While the box is designed for exterior use I liked it better out of the weather, especially when sailing.
__________________
Walt Elliott
Kingston WA
Puget Sound
Cal-29
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 11-04-2012
Junior Member
 
Join Date: Oct 2012
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ns22simple is on a distinguished road
Re: Simple 15A Shore Power In Small Boat (Looking to install in-line 15A AC Breaker)

Thanks for everyone's responses!

I was looking for a pre-assembled water-tight breaker that I could install after the conductors downsize at the 30A X 15A adapter. I realize that there are adapters with GFCI breakers but GFCIs protect against stray currents (i.e. shorts) and not overloading the circuit. I ultimately desire to have one duplex outlet in the boat that will supply the battery charger and and air dryer during the winter months.

Presently I am looking at a TRC temp powercord that has a GFCI at the male end and a 15A circuit breaker at the outlet box.

Thanks!
Nonsuch 22 "Simple"
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
Second shore power line beanctr56 Gear & Maintenance 13 09-15-2011 10:35 AM
Help: Simple Shore Power System YeahJohn Electrical Systems 52 01-26-2011 11:10 AM
tip need for install of weatherboot on shore power cord tuccia Gear & Maintenance 10 09-06-2008 01:08 PM
Shore Power for a small boat? 75R20 Gear & Maintenance 3 06-21-2008 08:53 PM
Shore power problem! Burned ground wire at main breaker JohnDrake Gear & Maintenance 2 08-20-2002 06:08 AM


All times are GMT -4. The time now is 12:02 PM.

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.