Sunday, March 13, 2011

Re: [Electric Boats] wire size

 

Richard,



According to ABYC code:

00 cable with 105 degree C insulation temperature 

-   in an engine space 162 amps
-   outside engine space max 30 degrees C ambient temperature:    182 amps

000 cable with 105 degree C insulation rating

- in an engine space 187 amps
- outside an engine space max 30 degrees C ambient temperature :  237 amps  

0000 cable with 105 degree C insulation rating

- in an engine space  209 amps
- outside an engine space max 30 degrees C :   266 amps


As a general rule of thumb we are even more conservative, recommending 100 amps on a 2/0 cable.   

What is very important to consider is the crimp, and the contact area of the lug, to avoid hot spots. 


James






On Mar 13, 2011, at 3:53 PM, Richard Mair wrote:

 

Just wondering what wire sizes people are using to set up the series connections on the batteries and connect them to the motor..
48 volt system with a max draw of 100 amps. Most times I expect to be in the 20 amp range from the anticipated figures
Thanks Richard


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