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" <k2...@kanafi.org>
To: <elecraft@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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