Any Electricians Here

[Fish Assassin]

Wiring in new battery system today. Going from a single 12v 24dc battery to a pair of 12v 27dc battery's. There will be a total of 14 feet of cable connecting them so 28 feet of cable over all.

Blue Seas Systems says #1 cable. Some have said #4 or #2 will be more then enough. I have looked at 1/0 just to be safe but it may just be over kill and a waste of money.

My biggest draw will be my old 90hp Yamaha and the prawn puller.

Any Thought?

 

[jeffywestcoast]

I had my cables custom made a chandler , with #4 copper.. more then adequate..IMO

 

[Ripcurl]

With the wire length run you mentioned there. You can safely run up to 250amps with 1/0, 200 amps with #1, 150 amps with #2 and 100 amps with 4. So I doubt your trap or motor will pull more than 100amps so you can get away with 4 gauge.

 

[Ripcurl]

This is a handy reference chart.

 

[Kisinana]

#4 more than adequate. Chances of you ever starting the motor and trap puller at the same time is almost nil and there is a fudge factor in the design of electrical cable.

 

[the fog ducker]

i run welding cable , 1/0 , to all my batteries ,
a battery can actually become a load to the another battery ( in Parallel) drain each other,,,
if the voltages are not perfectly balanced !!! , alot of this has to do with how you have your charging set up !!!
personally , before i switched to a Series 6 Volt bank system ( way better m2b) , i use ta run 2 x 12 volt batteries in Parallel , the positive from the motor to the first battery , the negative from the motor to the second battery , 1/0 jumpers in parallel , positive to positive and negative to negative,,,,
, this creates a nice even charge when up on step , and when using a shore power system for charge , do the same ..

if ya need better explanation , call polar Battery in Burnaby , Rob knows his chit
604-294-1891

compliments Pro-Line Electric

fd

 

[gungadin]

I got my battery cables made in Courtenay at Strathcon , with the correct ends, crimped and sealed for 100$, total length was about 24ft. Because the cable was exposed to some vibration at the engine end I used welding cable. Also covered it with wire loom, to protect it from uv and physical damage.

 

[Fish Assassin]

I got my battery cables made in Courtenay at Strathcon , with the correct ends, crimped and sealed for 100$, total length was about 24ft. Because the cable was exposed to some vibration at the engine end I used welding cable. Also covered it with wire loom, to protect it from uv and physical damage.

On account same place. #1 2X13ft and 1-3ft $168 OUCH.... That was almost $100 off.

So as you can guess I went with #1 Cables

 

[Sr SQ]

Better to go bigger on marine, most marine electronics are pretty sensitive to low voltage.
Voltage drop is one of the biggest reasons so many boats have sounders and other electronics reboot when starting the engine or pulling downriggers.
You should have no issues with the 1awg