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| Thread ID: 145664 | 2017-12-30 04:48:00 | Appliance power usage? | Greg (193) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1444192 | 2018-01-02 02:06:00 | If a fan is rated at 40 watts how can it be proved to show that it actually uses 40 watts? You plug it into a watt meter and check the readings. |
dugimodo (138) | ||
| 1444193 | 2018-01-02 08:24:00 | 40 W @ 220V = Amps ? (PF = 1) I like to use Amperage as my deciding factor on calculations like this. Watts is good to visualize the current for, say - a 40W light bulb verses a 100W light bulb. It becomes obvious for people to be instructed to think that way. However: With a Power Factor of (1) and your NZ single-phase 220V, you're using +|- 0.2 Amps.... this is assuming your 220 is single phase - right? |
SurferJoe46 (51) | ||
| 1444194 | 2018-01-02 08:29:00 | I don't need a fan right now. It's snowing. Look at all the Wattage I'm saving. Snow Watt and the seven amps ;) |
R2x1 (4628) | ||
| 1444195 | 2018-01-02 10:10:00 | 40 W @ 220V = Amps ? (PF = 1) I like to use Amperage as my deciding factor on calculations like this. Watts is good to visualize the current for, say - a 40W light bulb verses a 100W light bulb. It becomes obvious for people to be instructed to think that way. However: With a Power Factor of (1) and your NZ single-phase 220V, you're using +|- 0.2 Amps.... this is assuming your 220 is single phase - right? Yeah it's single phase for the most part, for regular homes anyway. There are 3 phases but generally only 1 is fed to a house, sometimes 2 but the only thing that might use dual phase is the oven. Single phase is 230V, Dual phase is 400V. But when talking about household power usage we might as well stick with watts, power is charged by the KW/H after all, not the A/H. |
dugimodo (138) | ||
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