Electrical Wire question - SailNet Community

 Search Sailnet:  forums  store
 Home Store Resources Articles About Us About Us Meet The Mods Press Releases & News Advertise on Sailnet Join The Crew Site Map

 Forums Articles Galleries Chat Boat Reviews Classifieds Search SailNet Boat Search (new)

 Shop theSailNet Store
 Anchor Locker Boatbuilding & Repair Charts Clothing Electrical Electronics Engine Hatches and Portlights Interior And Galley Maintenance Marine Electronics Navigation Other Items Plumbing and Pumps Rigging Safety Sailing Hardware Trailer & Watersports Clearance Items

 SailNet Community Electrical Wire question
 User Name Remember Me? Password
Not a Member?
 Register FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read Connect with Facebook Advertise

#1
02-22-2009
 KindOfBlue Barking Dog Join Date: Nov 2005 Location: Boston Posts: 236 Thanks: 0 Thanked 0 Times in 0 Posts Rep Power: 10
Electrical Wire question

I have always known wire to be measured in American Wire Gauge (AWG #4 #6, etc.), but recently learned about 1/0 and 2/0. Is this like fishing hooks (ex. 1 aught or 2 aught). Can someone explain the difference between AWG #2 and 2/0?

Thanks,
Craig
__________________
Craig
#2
02-22-2009
 JHJensen Marine: Educator,Surveyor Join Date: Sep 2008 Location: Connecticut, NY, Long Island,New Jersey Posts: 83 Thanks: 0 Thanked 0 Times in 0 Posts Rep Power: 7
AWG wire size description

Quote:
 Originally Posted by KindOfBlue I have always known wire to be measured in American Wire Gauge (AWG #4 #6, etc.), but recently learned about 1/0 and 2/0. Is this like fishing hooks (ex. 1 aught or 2 aught). Can someone explain the difference between AWG #2 and 2/0?
Craig,

Good question! You're correct with your fish hook example.

AWG wire is described by it's Circular Mil area and the number of strands for each size wire depending on wire type used.

AWG #2 has a CM Area of 66,360 while AWG 2/00 (00) CM Area of 133,100

The attached chart from ABYC Standard E-11 AC and DC Electrical Systems on Boats.(page 68 7/08)

Here are the notes which go with the chart:
*Type 1 - Solid conductor and stranding less than that indicated under Type 2 shall not be used.
**Type 2 - Conductors with at least Type 2 stranding shall be used for general purpose boat wiring.
***Type 3 - Conductors with Type 3 stranding shall be used for any wiring where frequent flexing is
involved in normal use.
NOTE:
1. Metric wire sizes may be used if of equivalent circular mil area. If the circular mil area of the
metric conductor is less than that listed, the wire ampacity shall be corrected based on the ratio of
the circular mil areas. For comparison of conductor cross sections (AWG and ISO) see
AP TABLE 2 .
2. The circular mil area given is equal to the mathematical square of the diameter of the AWG
standard solid copper conductor measured in one thousandths of an inch.
The area in square inches= pi(circular mils)/4(1,000,000)

The circular mil area of the stranded conductors may differ from the tabulated values and is the sum
of the circular mil areas of the wires (strands) in the conductor.

John
ABYC Master Technician
Attached Thumbnails

__________________
"It's not just about the vessel... more importantly it is about the people, their safety and their vessels in that order. "(PFJ 1952-1986)

Last edited by JHJensen; 02-23-2009 at 02:32 AM.
#3
02-22-2009
 scottyt Senior Member Join Date: Jul 2008 Location: chesapeake bay Posts: 1,942 Thanks: 0 Thanked 0 Times in 0 Posts Rep Power: 7
basicly they ran out of numbers, could not go any lower so they made up something else, the oot system. once you get over 4/0 its all measured in circular mils

Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.

## Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
 Please enter a valid email address for yourself. Email Address:

## Log-in

 User Name Remember Me? Password
Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

 Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

 Posting Rules You may post new threads You may post replies You may post attachments You may edit your posts BB code is On Smilies are On [IMG] code is On HTML code is On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post oft Gear & Maintenance 29 01-25-2015 09:51 AM sailboy21 Gear & Maintenance 8 04-14-2009 08:20 AM Islander30Bahama Electrical Systems 2 02-17-2009 11:28 AM Redline4Life Gear & Maintenance 12 02-08-2007 12:30 AM keitha Gear & Maintenance 25 04-11-2003 12:38 PM

All times are GMT -4. The time now is 06:45 PM.

 -- Default Style ---- Sailnet ---- Child of Default Style -- SailNet_2013 -- Articles Style Contact Us - Sailnet.com - Archive - Privacy Statement - Top