ive cut the plug on the new charger and am attempting to wire this in . My old charger has a romex style 3 wire going to it for power from the main panel on boat ,. the wires are tagged pos. neg. and ground. the3 wires that i have for the new charger as i have cut off the plug are brown, blue and green/yellow. what goes to what? also on the bat. connections my old charger had 3 terminals bat.1 , bat 2 which run to the mbss and a common neg. which seams to run somewhere towards the motor or batteries. now the new charger has 2 insulated cords for battery hook up each has a pos. and a neg.lead. with loop connectors and an inline fuse on each of the leads (pos $ neg.) 4 total. Now im assuming i can use the pos. leads to go to each of the connections at the switch but what do i do with the 2 negs.? do i combine them and connect them into the single neg. i have going to the original charger from the motor area?im so flippin confused !
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help wiring in new charger-gctid382138
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correction the new charger has only 3 fuses not 4, the lead marked starting bat. only has a fuse on the pos. lead and not the neg. the other line has a fuse on bothe the neg. and pos.
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correction #2 the romex type wire coming from the boats main panel has 3 wires marked pos. NEUTRAL , and ground.
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Scraping B wrote:
ive cut the plug on the new charger and am attempting to wire this in . My old charger has a romex style 3 wire going to it for power from the main panel on boat ,. the wires are tagged pos. neg. and ground. the3 wires that i have for the new charger as i have cut off the plug are brown, blue and green/yellow. what goes to what? also on the bat. connections my old charger had 3 terminals bat.1 , bat 2 which run to the mbss and a common neg. which seams to run somewhere towards the motor or batteries. now the new charger has 2 insulated cords for battery hook up each has a pos. and a neg.lead. with loop connectors and an inline fuse on each of the leads (pos $ neg.) 4 total. Now im assuming i can use the pos. leads to go to each of the connections at the switch but what do i do with the 2 negs.? do i combine them and connect them into the single neg. i have going to the original charger from the motor area?im so flippin confused !
One positive will run to each of the same places that the "bat1" and "bat2" connections ran to on the former charger, the other two can be connected to the existing "common neg" if it is sized sufficiently for the new charger, otherwise you will have to ground them yourself.
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Scraping B wrote:
correction #2 the romex type wire coming from the boats main panel has 3 wires marked pos. NEUTRAL , and ground.
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here is another curve ball , inside the mbss, the orig. charger bat. 1 was connected to the bat. 1 position on the switch, howeveer the 2nd line from the charger was connected to the BOTH position. should i follow suit or should i correct this and wire it to the pos 2 on the switch?
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ishiboo wrote:
One positive will run to each of the same places that the "bat1" and "bat2" connections ran to on the former charger, the other two can be connected to the existing "common neg" if it is sized sufficiently for the new charger, otherwise you will have to ground them yourself.
Take the charger Negatives to your System Negative Common..... which will be your engine Negative connection. Let the Battery Negs complete this for you.
Or, to a remote system negative terminal block.
As said, your wiring for the charger AC power will be; Hot, Neutral and Ground.
Scraping B wrote:
here is another curve ball , inside the mbss, the orig. charger bat. 1 was connected to the bat. 1 position on the switch, howeveer the 2nd line from the charger was connected to the BOTH position. should i follow suit or should i correct this and wire it to the pos 2 on the switch?
BATT #1, BATT #2, and/or ALL/BOTH are all results of the battery selection when realized at the "Common" terminal at the rear of the switch.
ALL/BOTH selection simply combines #1 and #2.
Think of your MBSS as a kitchen faucet.
Hot = battery bank #1 (or #2... doesn't matter)
Cold = battery bank #2 (or #1... doesn't matter)
The spicket = Common
You select Hot.... you get #1 bank out the spicket
You select cold.... you get Bank #2 bank out the spicket
You select both.... you get warm.... or ALL/BOTH out the spicket
No matter which has been selected, the spicket connects to your engine's starter motor solenoid terminal.
You can laugh at my analogy.... it won't hurt my feelings!
Charge leads to #1 and #2, Negatives connected correctly, and you'll be all set to go!
.
Rick E. (aka RicardoMarine) Gresham, Oregon
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Rick, that analogy is no joke! it totally helps me understand! im almost finished . I connected everything but the negs and i am excited! ill be back!
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Ooops, I was doing an edit while you posted. I changed the verbiage a bit.
So the silly analogy was OK, eh?
.
Attached files [img]/media/kunena/attachments/vb/685704=27682-MBSS showing terminals 2.jpg[/img]
Rick E. (aka RicardoMarine) Gresham, Oregon
2850 Bounty Sedan Flybridge model 31' LOA
Twin 280 HP 5.7's w/ Closed Cooling systems
Volvo Penta Duo Prop Drives
Kohler 4 CZ Gen Set
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my bad again, i think i am confusing an mbss with a selector switch! My switch has a n off at the bottom a 1 position to the left a 2 position to the right and a both position at the top . My og charger was wired to the #1 position and the both position . how should i wire the new one? i have completed the wiring to the #1 and to the #2 positions and all seems well. should i change the 2nd lead from the charger back to the both position on the switch ??
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Scraping B wrote:
my bad again, i think i am confusing an mbss with a selector switch! My switch has a n off at the bottom a 1 position to the left a 2 position to the right and a both position at the top . My og charger was wired to the #1 position and the both position . how should i wire the new one? i have completed the wiring to the #1 and to the #2 positions and all seems well. should i change the 2nd lead from the charger back to the both position on the switch ??
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That is so funny to read my analogy when someone else uses it and posts it. I had to read it twice!
Scraping B, MBSS = Main Battery Selector Switch. The same switch that selects #1..... ALL/BOTH...... #2.... and OFF, like what you have.
You're just not familiar with calling it an MBSS.
Good back to post # 10 and look at the rear of an MBSS.
Rick E. (aka RicardoMarine) Gresham, Oregon
2850 Bounty Sedan Flybridge model 31' LOA
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I don't mean to hijack this thread but I am going through the same process. On the MBSS would it make sense to have the following connected to the MBSS:
Position 1:
Cranking Battery Positive
Charger 1
Bilge Pump 1
Combiner Lead 1
Position 2:
House Battery Positive
Charger 2
Backup Bilge Pump
Combiner Lead 2
Connection to help fuse panel
It seems like a lot of connections at the MBSS. From the other posts you've written on the subject this is what I have gathered.
Greg
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wefivehodges wrote:
I don't mean to hijack this thread but I am going through the same process. On the MBSS would it make sense to have the following connected to the MBSS:
A.... Position 1: Cranking Battery Positive
Charger 1
Bilge Pump 1
Combiner Lead 1
B.... Position 2:
House Battery Positive
Charger 2
Backup Bilge Pump
Combiner Lead 2
Connection to help fuse panel
C..... It seems like a lot of connections at the MBSS. From the other posts you've written on the subject this is what I have gathered.
Greg
B.... If your "back up" pump is your largest "save-my-boat-from-sinking" pump, then yes...... ya got it right!
Not following the "Connection to help fuse panel" part! ????
C.... "It seems like a lot of connections at the MBSS" .... if you end up with more connections than you are comfortable with, you can take a heavy lead to a Fuse Block. Then power your items from there.
I suppose that if we're not careful, the ole Rat's Nest can occur at the MBSS as well.rod
.
Rick E. (aka RicardoMarine) Gresham, Oregon
2850 Bounty Sedan Flybridge model 31' LOA
Twin 280 HP 5.7's w/ Closed Cooling systems
Volvo Penta Duo Prop Drives
Kohler 4 CZ Gen Set
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