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philo

On 02/21/2017 06:22 PM, wrote:
On Tue, 21 Feb 2017 14:38:25 -0600, philo wrote:

snip

You would usually see this to mitigate voltage drop issues on a long
run of wire.
Say you had a 15a "outside" circuit and you want to extend that to a
shed 100 feet away, you might want to run that extension in #12.
A place you could see in commercial would be a run of wire through an
area with very high ambient temperatures like a roof top, where you
have to derate the wire on that run.

Now that makes sense to me.

I would thing a tag of some sort in the breaker box would be a good idea
to inform anyone not to put it on a 20 amp circuit.