[Amps] NEC-think.

[R.Measures]

On Jan 6, 2006, at 3:44 PM, John Popelish wrote:

> R. Measures wrote:
>>
>> On Jan 6, 2006, at 9:10 AM, John Popelish wrote:
> (snip)
>>> A lose connection at either end would be the most common cause of a
>>> high resistance neutral.
>>
>>
>> What if the cause of loosening the connection screw on the Neutral 
>> wire
>> also loosened a screw on the Ground?
> (snip)
>
> The most common cause (I think) of lose connections is thermal cycles
> caused by load cycles.  I see these often enough in industrial
> settings to be on the look out for them.  Sometimes with a thermal
> imager.  Ground connections see no such thermal cycles.

In a 240v circuit, Neutral carries zero current and Ground carries zero 
current.  How could the thermal cycles differ?
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org