[Amps] AC wiring

[R.Measures]

On Oct 20, 2005, at 6:52 AM, Tony King wrote:

> I wonder if we could clarify this question?
>
> Solder in protection grounding circuits is a no no because the thermal 
> heating of a lightning strike will likely cause the joint to open and 
> that's why the recommendation for exothermic welds (especially to 
> ground rods) but soldering was always approved for current carrying 
> circuits since it makes for a superior electrical connection. I 
> subscribe to the twisting, soldering and then applying the wire nut 
> method with the addition of a few turns of Scotch 33 to keep that nut 
> from turning. Solder is always better than a simple twisted wire 
> connection so that is why I wondered if it really is a violation (not 
> allowed) or just "not required". Is there a specific code section that 
> prohibits soldering in current carrying wires?

I have seen Pb-Sn solder erode in the presence of moisture.
>
> Thanks and 73, Tony W4ZT
>
> Gudguyham at aol.com wrote:
>>  In a message dated 10/20/2005 8:23:04 A.M. Eastern Standard Time,  
>> francis.carcia at hs.utc.com writes:
>> Does the  NEC permit connecting Cu wires with Ag-Sn  solder?
>> NO.....soldering is not allowed.  exothermic welding is, but truely, 
>> a  good marrying of the wires and a wire nut is a very good 
>> connection.  DON'T  solder them, if anything goes wrong, it is a  
>> violation.
>
>
>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org