Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-21-2020, 08:05 AM   #1
Senior Member
 
City: Delray Beach, FL and Denver, CO
Country: USA
Vessel Name: PartnerShip II
Vessel Model: 2003 Mainship 400
Join Date: Nov 2019
Posts: 104
No power to several breakers on AC panel

I have a 2003 MS 400. This boat is new to me and am still learning what and where everything is. I was using the 120 volt outlet in the main salon, switchable by a breaker on the panel. Worked fine.

Yesterday I turned it on and no indicator light and no power. I also noticed that there were 3 other breakers that had no power. All on the 120 panel.
A quick review of the wiring diagram showed they all came from the second leg of the 220 breaker.

I turned off the shore power and removed the panel for a look. I can see the second leg power coming from each 3 part breaker going to several other circuits. When I trace the circuit in question, all 4 circuits are wired together. The last one has a black wired that runs into the wire loom. No where else do any of these connect to a breaker on the power side. The other items on the 2nd leg are wired to the second leg eventually and work.

Leg 1 uses red wire, Leg 2 uses black wire and #3 leg (middle leg on each breaker) is the neutral and is white.
I turned on the shore power with the panel removed and tested power at all 3 legs. 120 from the middle (neutral) to leg 1 and leg 2. 220 across leg 1 and 2.
I also went to each 120 outlet to confirm the GFI had not tripped, although this would not cause my issue.
Again I can see a wire running from the breakers that don't work into the loom on the feed side.

I'm wondering where that wire goes and did I trip something. I've been doing regular maintenance and as mentioned this circuit DID work a couple of days ago.

One idea I had was to just run a wire from the 2nd leg to one of the non-working circuits. I'd have a marine electrician take a look and confirm my suggestion would work, but I'd like to figure this out. Any suggestions??
__________________
Advertisement

Newtrawlerowner is offline   Reply With Quote
Old 06-21-2020, 08:19 AM   #2
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 8,781
Do you have an inverter with an automatic transfer switch? What you're describing would indicate power could be leaving the main panel on another circuit, going to the inverter, and then returning to those breakers. My inverter circuits are wired in a similar manner.

Ted
__________________

__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is online now   Reply With Quote
Old 06-21-2020, 08:29 AM   #3
Guru
 
High Wire's Avatar
 
City: Cape May, NJ and Englewood, FL
Country: USA
Vessel Name: Irish Lady
Join Date: Dec 2007
Posts: 3,266
Get your meter and check the line side of the dead breakers Trace back towards shore power until you find the missing voltage.
__________________
Archie
1984 Monk 36 Hull #46
Currently in New Jersey.
High Wire is online now   Reply With Quote
Old 06-21-2020, 08:36 AM   #4
Senior Member
 
City: Delray Beach, FL and Denver, CO
Country: USA
Vessel Name: PartnerShip II
Vessel Model: 2003 Mainship 400
Join Date: Nov 2019
Posts: 104
Quote:
Originally Posted by O C Diver View Post
Do you have an inverter with an automatic transfer switch? What you're describing would indicate power could be leaving the main panel on another circuit, going to the inverter, and then returning to those breakers. My inverter circuits are wired in a similar manner.

Ted
Excellent suggestion. I'll take a look.
Newtrawlerowner is offline   Reply With Quote
Old 06-21-2020, 08:55 AM   #5
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 8,781
Quote:
Originally Posted by Newtrawlerowner View Post
Excellent suggestion. I'll take a look.
If the inverter appears to be functioning correctly and the breaker feeding the inverter from the main breaker panel is on, check the inverter itself. Almost all inverters have an output circuit breaker to protect the wiring from the inverter back to the breaker panel.

Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is online now   Reply With Quote
Old 06-21-2020, 08:57 AM   #6
Guru
 
tiltrider1's Avatar
 
City: Seattle
Country: USA
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 1,894
What are the non functioning breakers labeled?
tiltrider1 is offline   Reply With Quote
Old 06-21-2020, 09:47 AM   #7
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 8,873
If I remember, on one of the Mainships, there’s a breaker by the transom, deck side, port side
Larry M is online now   Reply With Quote
Old 06-21-2020, 02:54 PM   #8
Senior Member
 
City: Delray Beach, FL and Denver, CO
Country: USA
Vessel Name: PartnerShip II
Vessel Model: 2003 Mainship 400
Join Date: Nov 2019
Posts: 104
Smile No power to several breakers on AC panel.

Quote:
Originally Posted by Newtrawlerowner View Post
I have a 2003 MS 400. This boat is new to me and am still learning what and where everything is. I was using the 120 volt outlet in the main salon, switchable by a breaker on the panel. Worked fine.

Yesterday I turned it on and no indicator light and no power. I also noticed that there were 3 other breakers that had no power. All on the 120 panel.
A quick review of the wiring diagram showed they all came from the second leg of the 220 breaker.

I turned off the shore power and removed the panel for a look. I can see the second leg power coming from each 3 part breaker going to several other circuits. When I trace the circuit in question, all 4 circuits are wired together. The last one has a black wired that runs into the wire loom. No where else do any of these connect to a breaker on the power side. The other items on the 2nd leg are wired to the second leg eventually and work.

Leg 1 uses red wire, Leg 2 uses black wire and #3 leg (middle leg on each breaker) is the neutral and is white.
I turned on the shore power with the panel removed and tested power at all 3 legs. 120 from the middle (neutral) to leg 1 and leg 2. 220 across leg 1 and 2.
I also went to each 120 outlet to confirm the GFI had not tripped, although this would not cause my issue.
Again I can see a wire running from the breakers that don't work into the loom on the feed side.

I'm wondering where that wire goes and did I trip something. I've been doing regular maintenance and as mentioned this circuit DID work a couple of days ago.

One idea I had was to just run a wire from the 2nd leg to one of the non-working circuits. I'd have a marine electrician take a look and confirm my suggestion would work, but I'd like to figure this out. Any suggestions??

Thanks all for the helpful suggestions. It turned out to be the inverter. I must have turned it off by mistake. As soon as I turned it back on, everything worked. I must admit I had to read the manual I have to fully understand how it worked. Much different than my sailboat. But fixed now. Thanks again!!!!!
Newtrawlerowner is offline   Reply With Quote
Old 06-21-2020, 07:59 PM   #9
Guru
 
rgano's Avatar
 
City: Southport, Florida
Country: USA
Vessel Name: FROLIC
Vessel Model: Mainship 30 Pilot II since 2015. GB-42 1986-2015. Former Unlimited Tonnage Master
Join Date: Oct 2007
Posts: 1,660
Send a message via Skype™ to rgano
Yay, TED!
__________________
Rich Gano
FROLIC (2005 MainShip 30 Pilot II)
Panama City area
rgano is offline   Reply With Quote
Old 06-21-2020, 09:31 PM   #10
Guru
 
tiltrider1's Avatar
 
City: Seattle
Country: USA
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 1,894
That’s why I wanted to know what the labels on the breakers said. I suspected they had been rerouted to an inverter.
tiltrider1 is offline   Reply With Quote
Old Yesterday, 10:41 AM   #11
Senior Member
 
City: Delray Beach, FL and Denver, CO
Country: USA
Vessel Name: PartnerShip II
Vessel Model: 2003 Mainship 400
Join Date: Nov 2019
Posts: 104
No power to several breakers on AC panel. Update

Quote:
Originally Posted by O C Diver View Post
Do you have an inverter with an automatic transfer switch? What you're describing would indicate power could be leaving the main panel on another circuit, going to the inverter, and then returning to those breakers. My inverter circuits are wired in a similar manner.

Ted
OC Diver
Your suggestion turned out to be the cause. I must have turned off the inverter by mistake. I turned it on and everything worked. Thanks for the suggestion. I'm assuming these items are fed through the inverter and as I studied what the breakers controlled, it made sense. All circuits with the exception of the microwave were low power feeds. I'm not so sure the inverter would power the microwave without damage. But problem solved.
Newtrawlerowner is offline   Reply With Quote
Old Yesterday, 11:03 AM   #12
Guru
 
caltexflanc's Avatar
 
City: North Carolina for now
Country: USA
Vessel Name: Small Incentive
Vessel Model: Boston Whaler 130 Sport
Join Date: Aug 2011
Posts: 5,937
Another good reason to put the inverter circuits on their own panel. In the meantime label them. What size and model is the inverter?
__________________

__________________
George

"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
caltexflanc is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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





All times are GMT -5. The time now is 08:19 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×