Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 15-10-2017, 16:27   #1
Registered User

Join Date: May 2015
Posts: 22
122volts from 4volts ac, after a small spark?

My shore power dropped from 122 volts to 4 volts the last few days. I worked my way down the wires with a multimeter and had 122 volts the whole way. Once I got to the black and white ac wires that run from inlet to main ac panel, a small spark happened from the test probe and then I had 122 volts in the entire system again. I am leaving the boat for the next five months. What could be causing this problem?

Thanks

Christian
ketchcng is offline   Reply With Quote
Old 15-10-2017, 17:00   #2
Registered User

Join Date: Mar 2017
Location: Cape Canaveral
Boat: Gallart 13.50 MS
Posts: 94
Re: 122volts from 4volts ac, after a small spark?

It was probably a loose connection that was welded when the probe shorted it. Double check every connection. One of them is in a very dangerous state. If you're going to be leaving the boat, shut down everything that hasn't been carefully checked. Disconnect what you're not very sure about.
Corvidae is offline   Reply With Quote
Old 16-10-2017, 13:07   #3
Registered User

Join Date: May 2015
Posts: 22
Re: 122volts from 4volts ac, after a small spark?

Im not a welder, but are you saying the hot and neutral wires were arching and welding in a way and when I tested the wires, that somehow stopped the transfer from hot to neutral or vice verse?
ketchcng is offline   Reply With Quote
Old 16-10-2017, 14:52   #4
Registered User

Join Date: Mar 2017
Location: Cape Canaveral
Boat: Gallart 13.50 MS
Posts: 94
Re: 122volts from 4volts ac, after a small spark?

Without seeing it for myself there's no way to tell for sure what connection was made or broken where. However if an arc happened and then you could read voltage where you couldn't before, then either something melted or something arc welded. Either case can be bad if left unattended. The main danger is if something arced by barely being bumped, then it could happen again when you're not there, resulting in a fire. If you're going to be gone for a while, disconnect the suspect circuits until you can be there to track down the culprit. Or make sure your insurance is paid up and cross your fingers.
Corvidae is offline   Reply With Quote
Old 16-10-2017, 15:19   #5
Registered User
 
rwidman's Avatar

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 5,016
Re: 122volts from 4volts ac, after a small spark?

Quote:
Originally Posted by ketchcng View Post
My shore power dropped from 122 volts to 4 volts the last few days. I worked my way down the wires with a multimeter and had 122 volts the whole way. Once I got to the black and white ac wires that run from inlet to main ac panel, a small spark happened from the test probe and then I had 122 volts in the entire system again. I am leaving the boat for the next five months. What could be causing this problem?

Thanks

Christian
Two choices:

1) Hire a marine electrician to find and fix the problem.

2) Disconnect the boat from shore power while you are away and hire a marine electrician when you return.
__________________
Ron
HIGH COTTON
rwidman is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda BF8A lack of spark Gulf Islander Engines and Propulsion Systems 0 25-05-2014 16:22
Mariner 1993 9.9 2 stroke NO SPARK Wander Engines and Propulsion Systems 0 17-05-2014 16:56
Outboard wont spark, narrowed it down but need advice! OrangeCrush Engines and Propulsion Systems 6 28-12-2013 20:28
Suzuki DT2 No Spark tel105 Engines and Propulsion Systems 6 14-03-2011 18:32
Bright Spark electric anti-fouling system multihullsailor6 Electrical: Batteries, Generators & Solar 23 04-06-2008 10:11

Advertise Here


All times are GMT -7. The time now is 04:18.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.