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| why is the US not Metric |
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| james_s:
--- Quote from: Monkeh on October 26, 2019, 10:40:38 pm ---Of course they don't, if they did people would put them in 120V outlets and things would explode. It should be readily apparent that you will require an appropriately non-interchangable fitting for such radically different supplies, whether you go the route of distributing them unreasonable distances or use local regulation.. --- End quote --- Actually they do, well they're 12VDC. https://www.homedepot.com/p/Feit-Electric-60-Watt-Equivalent-Warm-White-3000K-A19-LED-12-Volt-RV-Marine-Light-Bulb-BPA800-830-LED-12/301842502 The were once common in fancier RVs (caravans) and yachts that were equipped with some standard domestic light fixtures. They used to be incandescent of course and I've seen CFL versions as well. Now that inverters are so cheap and widespread I don't think you see them in new stuff but the bulbs are still readily available. Typically they are not located on the same shelves as all the ordinary light bulbs but most hardware stores will stock them. Yes, if someone puts one in a 120V socket it instantly blows, but it's not really a hazard to anything but their wallet. HID lamps are widely available that will physically fit into a standard domestic light socket as well, some of the lower wattage types will start from 120V without any assistance at which point they of course fail instantly, usually the molybdenum ribbons fail at the arc tube pinch seals. As with the RV bulbs, they rely on people having just a bit of knowledge beyond "hey I can stuff it in here". |
| Monkeh:
--- Quote from: james_s on October 27, 2019, 03:31:01 am --- --- Quote from: Monkeh on October 26, 2019, 10:40:38 pm ---Of course they don't, if they did people would put them in 120V outlets and things would explode. It should be readily apparent that you will require an appropriately non-interchangable fitting for such radically different supplies, whether you go the route of distributing them unreasonable distances or use local regulation.. --- End quote --- Actually they do, well they're 12VDC. --- End quote --- Well, frankly, that's stupid. :-// Does not really happen here, with the exception of 110V lamps - but they're fairly restricted in availability. E: Although it seems there's a handful of them making their way over from China thanks to your influence.. |
| james_s:
It's a complete non-issue, I don't think I've ever personally known anyone who put an RV bulb into a household socket. I'm sure someone has done it somewhere but it's certainly not common. They say 12V right on the bulbs, they're significantly more expensive than standard bulbs and while they are fairly widely available you kind of have to go out of your way to get them. If you do give a 12V bulb 120V it just blows out, pop, no drama or excitement. I put a 6V cadelabra base lamp in a 120V socket once when I was a kid, blew it instantly but didn't cause any harm beyond that. It's not just the US that uses 120V, there are a whole handful of countries: https://www.school-for-champions.com/science/ac_world_volt_freq_list.htm |
| Simon:
--- Quote from: vad on October 26, 2019, 10:12:56 pm --- --- Quote from: Simon on October 26, 2019, 08:44:46 pm ---litres per 100km alwoys confused me. I mean why? --- End quote --- I am more confused by MPG-e ratings of EVs that don’t have petrol tank. --- End quote --- It's to try and help the stupid people that are not very good as basic arithmetic. |
| Rerouter:
The best way I have found to compare an EV to a Petrol/diesel is to look at the equivalent cost of power for the distance, then work out how much fuel you could buy on average for that cost. Of the 6 EV buses I've worked with, they averaged about 17L/100 vs a similar size and style diesel at 31L/100, and as power gets more expensive, that gets closer to parity, |
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