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@aol.com wrote:
>> In a message dated 10/20/2005 8:23:04 A.M. Eastern Standard Time,
>> francis.carcia@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
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