[Elecraft] Elecraft Digest, Vol 114, Issue 11

[bill conkling]

Many a fire has been caused by overloaded or defective  exposed extension cords.

And, melting insulation on an overburdened 13volt power cord smells terrible and lucky it wasn't directly across the battery.

...bill nr4c

Sent from my Verizon Wireless 4G LTE DROID

David Cutter <d.cutter at ntlworld.com> wrote:

>Are those codes applied to low voltage isolated supplies by law or
>are there separate codes for this?  In the context of the original question, 
>the 13.8V dc supply will not have the same shock hazard, though it may have 
>the same fire hazard, so, perhaps a different code/standard applies.  House 
>wiring requires a high degree of safety because its potential (risk) for 
>fire, but the risk of fire in isolated low voltage equipment which is on 
>view (ie not hidden in building cavities etc) is different.
>
>David
>G3UNA
>
>
>----- Original Message ----- 
>From: "Phil Kane" <k2asp at kanafi.org>
>To: <elecraft at mailman.qth.net>
>Sent: Tuesday, October 08, 2013 5:16 PM
>Subject: Re: [Elecraft] Elecraft Digest, Vol 114, Issue 11
>
>
>> On 10/7/2013 3:44 PM, Neal Enault wrote:
>>
>>> To determine the effects of ambient temperature, one has to do some
>>> not so accurate calculations or refer to a document like MIL-W-5088
>>> which also provides guidance for wire ratings in bundles and at
>>> various altitudes.
>>
>>
>> In the civilian/industrial world, the (U.S.) National Electrical Code
>> (NPFA 70) has a whole series of Ampacity tables (that's the term for
>> "current rating").  I've always used that as my guide.
>>
>> 73 de K2ASP - Phil Kane
>> Elecraft K2/100   s/n 5402
>>
>> From a Clearing in the Silicon Forest
>> Beaverton (Washington County) Oregon
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