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JimH wrote:
I am installing a 2nd battery on my boat with the new group 27 deep cycle
being on the aft starboard side, the exiting group 24 starting battery on
the aft port side. I will be installing an A/B switch near the existing
starter battery.

I need custom cut lengths of #4 gauge black and red battery cable
w/connectors or precut 10 and 4 foot cables with connectors.

Can anyone direct me to a good source with good prices for this?

TIA!


You will need #1 AWG wire to carry a 12-volt, 250-amp load 10 feet
without undue loss.

Golden website for calculating cable sizes:
http://www.ancorproducts.com/

Go to "technical information" and enter the length of your run, the
load (figured 250 amps for typical starting motor), and the voltage.
The screen will instantly calculate your cable requirement. Using the
variables shown above, the computer calculated #1 AWG, not #4.

Certainly don't pay for "custom" cables. Buy the wire you need, cut to
the lengths you want.
So far, you're paying only for the wire as it has to be cut to sell,
anyway. Fittings on something that heavy will need to be swaged or
"pressed" on, and you can just about buy a workable swaging tool for
what some people would charge you to make a handful of connections.


I was able to reduce the length of the run on the #2 battery positive cable
to 8 feet and found a great source for custom cut 2 AWG Marine tinned red
battery cable with only a minor charge for the connectors (and them
installing and heat shrinking them). The price was only a bit more than
what NAPA would charge for a custom cut piece of comparable cable, and this
is marine tinned.

For the ground/negative run I will purchase 10 feet 2/0 AWG black battery
cable from NAPA (they do not carry #1) and put the connectors on myself (lug
connectors).

Thanks again for your help on this (as well as to others who offered
advice)!