[time-nuts] Power monitoring
phk at phk.freebsd.dk
Thu Apr 17 14:42:02 EDT 2008
In message <20080417113454.pqo743vltwgwc8c8 at webmail.jpl.nasa.gov>, Jim Lux writ
>> As long as I'm dreaming... Suppose I wanted to measure the power my whole
>> house is drawing. What's available along the lines of a current transformer
>> on the main lines? My first thought is that nobody does that (for homes) so
>> it's probably horribly expensive. On the other hand there is a lot of
>> interest in energy conservation these days so it might only be somewhat
>Lots of these available, in the few hundred dollar range..
The best and likely cheapest solution is to get the data from your
utility meter. Most meters have a "S0" output which sends a pulse
evern X Wh.
If you can't find it, ask your power-company for access. Tell them
you want to monitor your energy conservation effort and they'll likely
not charge you for it.
If that fails, search google for "gasdims" :-)
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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