12 volt wiring

Submitted: Tuesday, Oct 27, 2009 at 13:44

ThreadID: 73342 Views:3998 Replies:3 FollowUps:4

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Member - lyndon NT

Hi all
I heard some time ago there was a guy who put out a basic book on understanding 12 volt systems. Anyone rember the name of the author and title?
Thanks Lyndon

Now is the only time you own
Decide now what you will,
Place faith not in tomorrow
For the clock may then be still

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Reply By: Shaker - Tuesday, Oct 27, 2009 at 13:50

Tuesday, Oct 27, 2009 at 13:50

Collyn Rivers.

AnswerID: 388951

Follow Up By: Shaker - Tuesday, Oct 27, 2009 at 13:54

Tuesday, Oct 27, 2009 at 13:54

I just Googled the name of the book, Motorhome & Caravan Electrics, he also has another very good book taht touches on electrics "The Camper Trailer Book"

There is also a book called "The 12 Volt Bible"

FollowupID: 656670

Reply By: Member - lyndon NT - Tuesday, Oct 27, 2009 at 14:08

Tuesday, Oct 27, 2009 at 14:08

Thanks mate!

Now is the only time you own
Decide now what you will,
Place faith not in tomorrow
For the clock may then be still

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AnswerID: 388954

Reply By: ACH - Tuesday, Oct 27, 2009 at 18:50

Tuesday, Oct 27, 2009 at 18:50

Further good info can be found at Rays Caravan Campervan and Motorhome.

Cheers
Andy

AnswerID: 389015

Follow Up By: Member - Sigmund (VIC) - Wednesday, Oct 28, 2009 at 11:15

Wednesday, Oct 28, 2009 at 11:15

Useful site; thanks Andy.

What would folk describe as the voltage that effectively equals flat in a 12v battery.

That site mentions 10.5 v for capacity rating purposes. Too low for real life?

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Follow Up By: Dandj - Thursday, Oct 29, 2009 at 14:14

Thursday, Oct 29, 2009 at 14:14

Yes, if it reads 10.5v or less after sitting unloaded for a few hours it's either flat or stuffed.

If it drops to 10.5v while driving a load it's probably OK (which is why inverters etc have a low voltage cut out at that level), just run out of capacity. Don't leave it that way. Charge it fully and then let it stand for a few hours. If it then reads 10.6v or more it's probably OK.

On load it will probably drop to around 12.2v which is OK if it stays that way, if it drops below 12v straight away, it's cactus.

FollowupID: 656972