Re: Wall wart current draw

The toaster oven and toaster are heavy users if you are in a Peak load or Peak max limit....
billing (a ratcheting clamp of higher bills based on peak).

One sneaky one is the outside air conditioner in winter. The heater for the oil is
still heating. It must be turned on for hours prior to first use - but then I'd check
with a air con guy before chilling that as it may cause another issue.

I used to log power leg currents - using two clamp meters on each leg being fed into
an ADC on my computer. An 8080. It was interesting to run it for a few days and look
at the plots.

Martin

Martin

Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


RoyJ wrote:
I just used my "Kill-A-Watt" power meter to take a look at several wall warts. All the samll ones were slightly warm to the touch, at no load used less than 1 watt (limit of resolution) on the power meter, and had a power factor down in the .15 range. I tried a bigger one used for charging my big cordless drill, it ran 4 watts and .47 power factor.

As a side note, I got a "Kill-A-Watt" power meter
http://www.p3international.com/products/special/P4400/P4400-CE.html
run about $30 to $35, used it to track down about 3/4 of my total household power useage. The wall warts were NOT an issue, the freezer, the refrigerator, and my wife's reading lamp were heavy hitters. The reading lamp got a 40 watt florescent, saves about $6 a MONTH on that item alone!!

I took a reading for several days on each item, loaded the KWH reading and hour reading into a spead***, and calculated the monthly power consumption and cost. Real eye opener!

Siggy wrote:

A while back there was a discussion about why wall wart transformers that were not under load would draw no current. Anyone recall that thread? As I recall there were some references to the induced currents created by collapsing magnetic fields etc.

Anyway, I'm trying to either prove or disprove the statement that unplugging wall warts when not actually using them to power or re-charge your device will save electricity. My recollection is that it doesn't matter. Right or wrong?


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----
.

Loading