BundyRoy
Dedicated elf
- Joined
- Apr 9, 2014
- Messages
- 1,026
I bought one of those plug into the wall power usage/current draw meter things the other day and I have been having a bit of a play.
I set it up with the power cost of $0.31/kWh and then plugged it into the kettle. Got a bit of a shock. The kettle draws just over 9A and the meter said it was 2400W and it used about $4 worth of power to boil the water. I know these meters are probably not going to be highly accurate but was wondering if these numbers are normal.
I then checked the kettle and it says it is 2200W. So that's within 10%. I thought the house circuits are only rated at 10A so when I saw 9A I was a bit concerned.
I think our last power bill said we were using about $7/day so $4 to boil the kettle seems high.
I guess 2200W/240V= 9A so maybe it's close. Do those formulas work for AC.
Anyway if anybody is qualified to give me their opinion on these numbers I would appreciate it.
Thanks
I set it up with the power cost of $0.31/kWh and then plugged it into the kettle. Got a bit of a shock. The kettle draws just over 9A and the meter said it was 2400W and it used about $4 worth of power to boil the water. I know these meters are probably not going to be highly accurate but was wondering if these numbers are normal.
I then checked the kettle and it says it is 2200W. So that's within 10%. I thought the house circuits are only rated at 10A so when I saw 9A I was a bit concerned.
I think our last power bill said we were using about $7/day so $4 to boil the kettle seems high.
I guess 2200W/240V= 9A so maybe it's close. Do those formulas work for AC.
Anyway if anybody is qualified to give me their opinion on these numbers I would appreciate it.
Thanks