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NewLady
Electricity testing?

Hi Guys,

Hope this question isn't too...um, dumb. But is there a product that you use to test how much power an appliance is using? For example, if I have my tv, vcr, dvd player and playstation (bf's) plugged in, but not turned on...can I do something to test it to see if it's sucking power? I thought I saw an ad for something like this, where you plug the device into the open outlet and it will read how much it's using.

TIA :)

havanagranite
Re: Electricity testing?

http://www.smarthome.com/9034.html

I don't know how many different kinds are out there but here is one

kentvw
Re: Electricity testing?

Not a "dumb" question at all. I think it's a great question.

I have heard some misconceptions off and on and here and there regarding power consumption of electrical items that are plugged in but not turned “on”. Since it sort of relates to this thread I thought I would post it.

On “idle” (Not turned on but still has lights or a clock running.) a fax machine, TV, Coffee maker etc. might draw from 50mA to 400mA so let’s go in the middle and use 200mA for the example. Let’s also say that you’re paying .10 cents per kilowatt hour.

24hours x 30days = 720hours

.002 (200mA) x 720hours = 1.4 kilowatt hours.

1.4 kilowatt hour x .10 = .14

So, for your fax machine to idle all month costs you .14 cents.

NewLady
Re: Electricity testing?

Thank you for the help guys, I actually found out that my local library lends these out for free! So I will use one to see how my appliances are doing...lol.

JLMCDANIEL
Re: Electricity testing?
kentvw wrote:

Not a "dumb" question at all. I think it's a great question.

I have heard some misconceptions off and on and here and there regarding power consumption of electrical items that are plugged in but not turned “on”. Since it sort of relates to this thread I thought I would post it.

On “idle” (Not turned on but still has lights or a clock running.) a fax machine, TV, Coffee maker etc. might draw from 50mA to 400mA so let’s go in the middle and use 200mA for the example. Let’s also say that you’re paying .10 cents per kilowatt hour.

24hours x 30days = 720hours
.002 (200mA) x 720hours = 1.4 kilowatt hours.
.2 (200 ma) x 120 volts = 24 watt
24 watt x 720hrs =17280 watt hrs or 17.28 kilowatt hours
1.4 kilowatt hour x .10 = .14
17.28 kh x .10 = $1.73
So, for your fax machine to idle all month costs you .14 cents.

Just a math error,:D
Jack

kentvw
Re: Electricity testing?

:D

Poke'm when they are down! :p

I was in a hurry to go to lunch when I posted and had a funny feeling about that post............ By the time I get back from lunch to fix it there is a note from BP regarding my math error........... So............... I go to correct my dumb mistake and my compadres have pounced! :D

My day in the bucket...............

bp21901
Re: Electricity testing?
kentvw wrote:

:D

Poke'm when they are down! :p

Ok.....Glad to oblige..... :D

JLMCDANIEL
Re: Electricity testing?

I know if I had done that it would have given you a great deal of pleasure to correct it.:D :D :D
Jack

kentvw
Re: Electricity testing?
JLMCDANIEL wrote:

I know if I had done that it would have given you a great deal of pleasure to correct it.:D :D :D
Jack

Oh how right you are, my friend, how right you are. :D :D :D

NewLady
Re: Electricity testing?

Well guys, I borrowed one from the local library. What I really want to find out is how much it's costing to have a space heater plugged in but not on. I hooked it up and left it for 12 hours, came back and the kwh reading said 0.01. So how is it that I calculate this? Sorry guys, never been good at math :(

kentvw
Re: Electricity testing?

If it really is a kwh reading and not an amperage reading. (As was corrected by bp and Jack earlier,:D ) Then to get an idea of what a month, 30days, 720 hours would cost then you would multiply .01 x 720 x what you pay for a kwh. I pay around $.10 per kwh so it would cost me $.72.

Keep in mind that I don’t calculate my kwh rate by what my bill says that rate is. I calculate it by what the electrical portion of my bill is divided by my usage.

Because, on top of my base rate additional fees are added for things like special tax for protecting birds that fly into lines, wind energy research, bonus for the CEO. Etc.;)

Your thread got me thinking so last night I ran around my place with a modified extension cord and an amp clamp meter checking all things I leave plugged in that continually draw current. My copy/fax/scanner alone draws close to an amp and all totaled I was at 2.7 amps. Yikes!

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