SV: [AT] Tractor wiring

Kessen Mattias (Road SE) mattias.kessen at ncc.se
Wed Nov 17 22:52:11 PST 2004


Yes it's different you need thinner threads to get flexibility at moving vibrating parts. At least here the insulation is different. On your tractor you might need the insulation to be heat and maybe?! oil resistant. 

/Mattias

-----Ursprungligt meddelande-----
Från: Robert L. Holtzer [mailto:rholtzer at earthlink.net]
Skickat: den 17 november 2004 22:20
Till: Antique tractor email discussion group
Ämne: Re: [AT] Tractor wiring


Residential stranded wire appears to have courser strands than 
automotive.  Anyone comment on this?  Also, the insulation may differ.

Bob Holtzer

Mike Sloane wrote:

> One other thing: house wiring is solid copper, but for vehicles of any 
> kind, you should use "stranded" copper. Also, it is my understanding 
> that stranded wire will carry more current than solid wire of the same 
> gage (something called "skin effect"). The reason for using stranded 
> wire is that it is better able to handle the vibrations and doesn't 
> "work harden". OK, two things: resistance losses for direct current 
> are higher than for alternating current, so for longer runs you need 
> relatively thicker wire. Fortunately, most tractor wiring is very 
> short, that that isn't usually an issue.
>
> Mike
>
> Spencer Yost wrote:
>
>> Mattias is right, the formula holds true for any type of electrical
>> circuit.   Be sure to realize resistance, an important additional 
>> load on
>> the circuit that may change your decision on wire size, increases 
>> with the
>> length of the wire.
>>
>> As for wire sizes, 10 ga. is used for charging circuits on virtually all
>> vehicles with regular duty alternators and alternators are usually the
>> highest wattage circuits (400-800 watts) on a vehicle.  So I use 10 
>> ga for
>> any type of charging circuit, I use 10 ga (and a relay!) for modern
>> high-intensity lamps and I use 12 ga. for for lower output lights if 
>> there
>> is more than 2 on the circuit.  I use 14 ga. for everything else.  If 
>> I am
>> unsure, I use 10 ga and a separate switching circuit with a relay.  
>> Heavy
>> duty alternators, if I had ever wired for any, would probably get 6-8 ga
>> wire.
>>
>> I have no engineering calculations to back this up but this is what I 
>> have
>> learned to use over the years and seems to match pretty well with 
>> what is
>> used in practice by manufacturers and hold up to a few offhand 
>> resistance
>> and wattage calculations I have done on the back of a tool package 
>> label.
>> I am sure others have some better ideas that maybe are tested or 
>> calculated
>> that may give you a better degree of comfort than "This is Spencer's 
>> system
>> and it works for him because nothing has burned down"  (-;
>>
>> Spencer Yost
>> Owner, ATIS
>> Plow the Net!
>> http://www.atis.net
>>
>> *********** REPLY SEPARATOR  ***********
>>
>> On 11/16/2004 at 10:18 PM Greg Hass wrote:
>>
>>
>>> After several years of procrastinating I am going to completely 
>>> rewire my Farmall 856 with a year-a-round cab.  I can rewire a 
>>> house, a barn or a shop.  However, when it comes to tractor wiring I 
>>> can't figure the size of
>>
>>
>>
>>> wire to use when it comes to wiring the various components.  For 
>>> instance,
>>
>>
>>
>>> I want to add some halogen lights, some hooked together and some 
>>> wired singly.  Also, I want to add a heater and possibly get the 
>>> circulating fan
>>
>>
>>
>>> running, which has never worked since I've owned the tractor.
>>>
>>> I want to use adequate sized wire, but on the other hand no bigger 
>>> than needed as the heavier wire is harder to work with.  Does anyone 
>>> know of a chart, or source, or rule of thumb on how to figure such 
>>> things?  For instance, with house wiring "amps x volts = watts", but 
>>> I'm not sure the same formula would apply to a 12-volt system.
>>>
>>> Greg Hass
>>>
>>> _______________________________________________
>>> AT mailing list
>>> http://www.antique-tractor.com/mailman/listinfo/at
>>
>>
>>
>>
>>
>> _______________________________________________
>> AT mailing list
>> http://www.antique-tractor.com/mailman/listinfo/at
>>
>

_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at




More information about the AT mailing list