Re: [mh] Whole home power monitoring

On 5/23/21 3:04 PM, Jeff Siddall via misterhouse-users wrote:
> ... simply by looking up the power rating of all your electrical 
> equipment ...

[snip]

You'll be safe doing it that way, but you won't be accurate. 
Manufacturers (in the US at least) get fined for showing ratings that 
are even slightly too low, but none if their ratings are too large, no 
matter by how much. I think the fines are per-unit sold, and violations 
might get discovered years later. In any case, they always seem to 
include a very large margin to make sure they don't get fined. I added 
an extra circuit to my office based on those numbers, that I later 
learned I probably didn't need.

> Even better, at least for plug-in appliances, is to get a plug-in 
> power meter such as a Kill-A-Watt and find out what your power hungry 
> devices draw, then add those up.

That's the more reliable approach. As mentioned, many devices peak at 
power-on or as they're coming up. Others peak when their demand is the 
heaviest.  What I'd really like is something like a Kill-A-Watt that 
will measure over time and give me peak numbers, or something that will 
log values to a flash key that I could analyze later. I haven't found 
anything that does that at a hobbyist-reasonable price.

                                               -Brian M




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