• ##### Contests and Sweepstakes

1. Junior Member
Join Date
Jan 2008
Posts
16

## 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

2. Senior Member Rank 2
Join Date
Nov 2007
Posts
980

## Re: Electricity testing?

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

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

3. Banned Rank 2
Join Date
Aug 2007
Location
Denver, CO
Posts
666

## 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.

4. Junior Member
Join Date
Jan 2008
Posts
16

## 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.

5. ## Re: Electricity testing?

Originally Posted by kentvw
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,
Jack

6. Banned Rank 2
Join Date
Aug 2007
Location
Denver, CO
Posts
666

## Re: Electricity testing?

Poke'm when they are down!

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!

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

7. Senior Member Rank 2
Join Date
Aug 2007
Posts
612

## Re: Electricity testing?

Originally Posted by kentvw

Poke'm when they are down!
Last edited by bp21901; 02-14-2009 at 09:56 PM.

8. ## Re: Electricity testing?

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

9. Banned Rank 2
Join Date
Aug 2007
Location
Denver, CO
Posts
666

## Re: Electricity testing?

Originally Posted by JLMCDANIEL
I know if I had done that it would have given you a great deal of pleasure to correct it.
Jack

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

10. Junior Member
Join Date
Jan 2008
Posts
16

## 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

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•