Re: Stus-List wire gauge

[Ron Ricci via CnC-List]

Bev,

 

Patriot’s battery wiring was upgraded last year.  I used 2/0 from the battery 
negative terminals to the common tie point on the engine block and #2 from the 
battery positive terminals to the battery switch and then to the starter.  #2 
was the largest size that could be easily fit on the battery switch.  Each 
battery has a 200 amp terminal mounted fuse to protect the cabling.  After 
rewiring, I noticed a marked improvement in performance. 

 

My #1 bank is a single group 31 battery located under the settee in the forward 
part of the main cabin.  Even with the longer distance to the starter, the 
engine cranks fine.  The #2 bank is two group 31 batteries located under the 
aft part of the settee (just forward of the galley sink).  I use the #2 bank 
for house loads and keep the #1 battery in reserve for starting the engine.  
With ALL or even just the #2 battery selected, I can start the engine without 
‘rebooting’ the chart plotter.

 

I’d also suggest borrowing the correct crimping tool and dies (such as Thomas & 
Betts TBM6S) to make sure the connections at the lugs are solid.  

 

Good luck at rewiring your boat,

Ron

Ron Ricci

S/V Patriot

C 37+

Bristol, RI

 <mailto:ron.ri...@1968.usna.com> ron.ri...@1968.usna.com

 

 

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bev Parslow 
via CnC-List
Sent: Friday, December 1, 2017 1:48 PM
To: cnc-list@cnc-list.com
Cc: Bev Parslow
Subject: Stus-List wire gauge

 

What is the best gauge for wiring the battery to the engine? Do I need to go to 
1 or 2. We have a voltage drop from 12 to 8 volts.

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Re: Stus-List wire gauge

[Josh Muckley via CnC-List]

Blue Sea calculates that for a 100amp load 2 conductors and 10 feet in the
engine room you need 2 AWG - roughly 1/4 inch diameter.  Seems on the small
side compared to what I have but I wouldn't get too upset.  Follow the
calcs.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Dec 1, 2017 1:48 PM, "Bev Parslow via CnC-List" 
wrote:

> What is the best gauge for wiring the battery to the engine? Do I need to
> go to 1 or 2. We have a voltage drop from 12 to 8 volts.
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
>
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Re: Stus-List wire gauge

[Josh Muckley via CnC-List]

Voltage drop from 12 to 8 when cranking or idle?  I agree, check all the
connections for corrosion and tightness including the battery terminals.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Dec 1, 2017 1:48 PM, "Bev Parslow via CnC-List" 
wrote:

> What is the best gauge for wiring the battery to the engine? Do I need to
> go to 1 or 2. We have a voltage drop from 12 to 8 volts.
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
>
___

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Re: Stus-List wire gauge

[bwhitmore via CnC-List]

We had our two ground cables corroded so badly in the inside that they felt 
crunchy when pulled on.  


Sent from my Verizon, Samsung Galaxy smartphone
 Original message From: Marek Dziedzic via CnC-List 
<cnc-list@cnc-list.com> Date: 12/1/17  6:38 PM  (GMT-05:00) To: 
cnc-list@cnc-list.com Cc: Marek Dziedzic <dziedzi...@hotmail.com> Subject: Re: 
Stus-List wire gauge 


My first bet would be the connection on either the battery or the starter 
terminals (one year one of my batteries was showing 7 V!. a bit of cleaning and 
tightening the nuts and it was back to normal))
 
Marek
 


From: CnC-List [mailto:cnc-list-boun...@cnc-list.com]
On Behalf Of Bev Parslow via CnC-List

Sent: Friday, December 1, 2017 13:48

To: cnc-list@cnc-list.com

Cc: Bev Parslow <bparslo...@yahoo.ca>

Subject: Stus-List wire gauge


 


What is the best gauge for wiring the battery to the engine? Do I need to go to 
1 or 2. We have a voltage drop from 12 to 8 volts.



___

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Re: Stus-List wire gauge

[Marek Dziedzic via CnC-List]

My first bet would be the connection on either the battery or the starter 
terminals (one year one of my batteries was showing 7 V!. a bit of cleaning and 
tightening the nuts and it was back to normal))

Marek

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bev Parslow 
via CnC-List
Sent: Friday, December 1, 2017 13:48
To: cnc-list@cnc-list.com
Cc: Bev Parslow <bparslo...@yahoo.ca>
Subject: Stus-List wire gauge

What is the best gauge for wiring the battery to the engine? Do I need to go to 
1 or 2. We have a voltage drop from 12 to 8 volts.
___

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Re: Stus-List wire gauge

[Joe Della Barba via CnC-List]

1 or 2 gauge wire will do fine. If you have 8 volts at the engine end something 
is very wrong.

 

Joe DB

Coquina

C 35 MK I

 

Joe Della Barba

j...@dellabarba.com

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bev Parslow 
via CnC-List
Sent: Friday, December 01, 2017 1:48 PM
To: cnc-list@cnc-list.com
Cc: Bev Parslow <bparslo...@yahoo.ca>
Subject: Stus-List wire gauge

 

What is the best gauge for wiring the battery to the engine? Do I need to go to 
1 or 2. We have a voltage drop from 12 to 8 volts.

___

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Stus-List wire gauge

[Bev Parslow via CnC-List]

What is the best gauge for wiring the battery to the engine? Do I need to go to 
1 or 2. We have a voltage drop from 12 to 8 volts.___

Thanks everyone for supporting this list with your contributions.  Each and 
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Re: Stus-List Wire Gauge question

[Paul Fountain via CnC-List]

The Blue  Seas calculator says for the voltage drop you need 10 gauge, which 
has an amp capacity of 40! For the amperage you need  ABYC says 18 gauge, so 
somewhere in between is where I'd be.

Paul Fountain
Managing Director
SeaSource Inc.
Bookkeeping  IT Services.

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Alex 
Giannelia via CnC-List
Sent: Saturday, July 25, 2015 7:36 AM
To: cnc-list@cnc-list.com
Cc: Alex Giannelia a...@airsensing.com
Subject: Stus-List Wire Gaiuge question

So here is a question for the electrical engineers regarding ABYC specs and 
wire gauges

If I have a 25watt bulb at the top of my mast and I want to follow the 3% 
voltage drop rule I need to allow for 140' of run so about a 6 gauge wire.  
That is huge.

My question is have I misinterpreted the tables?

Also, what influence does the ground (return wire) gauge on this stuff have?

Alexander M. Giannelia
President

the airborne sensing corporation
555 Richmond Street West, Suite 912, PO Box 1008, Toronto, Ontario M5V 3B1, 
Canada

Phone(416) 203-9858
Mobile(416) 529-0070
Fax  (416) 203-9843

*Notre site web est aussi disponible en français! 
www.airsensing.comhttp://www.airsensing.com/

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Re: Stus-List Wire Gauge question

[Joel Aronson via CnC-List]

Why not use an LED?

Joel

On Saturday, July 25, 2015, Paul Fountain via CnC-List 
cnc-list@cnc-list.com wrote:

  The Blue  Seas calculator says for the voltage drop you need 10 gauge,
 which has an amp capacity of 40! For the amperage you need  ABYC says 18
 gauge, so somewhere in between is where I’d be.



 *Paul Fountain*

 *Managing Director*

 *SeaSource Inc.*

 *Bookkeeping  IT Services.*



 *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com
 javascript:_e(%7B%7D,'cvml','cnc-list-boun...@cnc-list.com');] *On
 Behalf Of *Alex Giannelia via CnC-List
 *Sent:* Saturday, July 25, 2015 7:36 AM
 *To:* cnc-list@cnc-list.com
 javascript:_e(%7B%7D,'cvml','cnc-list@cnc-list.com');
 *Cc:* Alex Giannelia a...@airsensing.com
 javascript:_e(%7B%7D,'cvml','a...@airsensing.com');
 *Subject:* Stus-List Wire Gaiuge question



 So here is a question for the electrical engineers regarding ABYC specs
 and wire gauges



 If I have a 25watt bulb at the top of my mast and I want to follow the 3%
 voltage drop rule I need to allow for 140’ of run so about a 6 gauge wire.
 That is huge.



 My question is have I misinterpreted the tables?



 Also, what influence does the ground (return wire) gauge on this stuff
 have?



 *Alexander M. Giannelia*

 President



 the* airborne sensing *corporation

 555 Richmond Street West, Suite 912, PO Box 1008, Toronto, Ontario M5V
 3B1, Canada



 Phone(416) 203-9858

 Mobile(416) 529-0070

 Fax  (416) 203-9843



 **Notre site web est aussi disponible en français!* *www.airsensing.com
 http://www.airsensing.com/*





-- 
Joel
301 541 8551
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Re: Stus-List Wire Gauge question

[Rick Brass via CnC-List]

3% drop is 0.36 volts based on 12.0V average over the battery discharge
cycle

25 watts will draw 2.1 amps of current (think about getting an LED
replacement bulb. 16 to 20 amp hours of current draw per night is a heck of
a drain on your house bank. My navigation, steaming, anchor, foredeck and
spreader lights are all LEDs. And collectively they only draw about 2.4
amps)

Using the equation VOLTAGE DROP = CURRENT X RUN X OHMS PER FOOT and solving
for Ohms, you get a target resistance of .001225 ohms.

Based on Anchor AWG wire, that is in between the resistance of 10 GA
(.00098) and 12 GA (.00175)

So 10 GA would be the choice for lower voltage drop, and 12 GA would result
in 0.5 V drop, or just over 4%

 

Rick Brass

Washington, NC

 

 

 

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Paul
Fountain via CnC-List
Sent: Saturday, July 25, 2015 7:58 AM
To: cnc-list@cnc-list.com
Cc: Paul Fountain p...@seasource.ca
Subject: Re: Stus-List Wire Gauge question

 

The Blue  Seas calculator says for the voltage drop you need 10 gauge, which
has an amp capacity of 40! For the amperage you need  ABYC says 18 gauge, so
somewhere in between is where I’d be.

 

Paul Fountain

Managing Director

SeaSource Inc.

Bookkeeping  IT Services.

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Alex
Giannelia via CnC-List
Sent: Saturday, July 25, 2015 7:36 AM
To: cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com 
Cc: Alex Giannelia a...@airsensing.com mailto:a...@airsensing.com 
Subject: Stus-List Wire Gaiuge question

 

So here is a question for the electrical engineers regarding ABYC specs and
wire gauges   

 

If I have a 25watt bulb at the top of my mast and I want to follow the 3%
voltage drop rule I need to allow for 140’ of run so about a 6 gauge wire.
That is huge.

 

My question is have I misinterpreted the tables?

 

Also, what influence does the ground (return wire) gauge on this stuff have?

 

Alexander M. Giannelia

President

 

the airborne sensing corporation

555 Richmond Street West, Suite 912, PO Box 1008, Toronto, Ontario M5V 3B1,
Canada

 

Phone(416) 203-9858

Mobile(416) 529-0070

Fax  (416) 203-9843

 

*Notre site web est aussi disponible en français! www.airsensing.com
http://www.airsensing.com/ 

 

___

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