[Pc_Support] Reducing Electricity Costs

[Jason Boxman]

On Thursday 09 February 2006 21:28, Brian Rose wrote:
> Jason Boxman wrote:
> > What equipment did you use to measure the actual power utilization for
> > each system / device?
>
> A simple multimeter that reads AC current is fine. I have a $25 RadioShack
> meter that would work fine. The multimeter needs to be in series when
> measuring current, so you'll need to rig up a cable.
>
>                       ________________________
>
> 120VAC +  ---------- | Meter +    Meter COM |-------------
>                       ------------------------              Socket
> Plug   -  ------------------------------------------------
>
>
> Measure the current draw and multiply by 120V to get your power.

Cool.

> For a frugal device that draws 8mA...
>
> mA = 0.008A * 120V = .96W ~=  1W = .001kW
>
> .001kW * 24 hours * 30 days = 0.720kWh
>
> Price for electricity is around 10 cents per kilowatt, so each standby watt
>   costs you seven cents per month.
>
> Roughly.

Yeah, I pay around $0.09 I think, or there abouts.

I wonder how much my TV draws in stand-by...

-- 

Jason Boxman
http://edseek.com/ - Linux and FOSS stuff