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why is the US not Metric
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tooki:

--- Quote from: vad on October 25, 2019, 11:36:49 pm ---In the US we typically have a separate 15A branch circuit per bedroom.

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I’m American, I’m well familiar with US wiring, thanks.


--- Quote from: vad on October 25, 2019, 11:36:49 pm ---So 120W low-voltage circuit per bedroom is plenty enough for LED lights - with 100 lpw devices you can light up bedroom with 12,000 lumens - equivalent to 15 x 60W incandescent bulbs - far more than anyone would need.

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And for this you want to double the amount of wiring in a house, again, right as the cost of copper has never been higher?  :palm:

But moreover, it’s not just lights. What about the 12W phones and tablets, the 90W laptops, and all the other myriad gadgets we use and charge? It’s easy to exceed the 10A you’ve budgeted.



--- Quote from: vad on October 25, 2019, 11:36:49 pm ---240V is a two-phase system with a neutral wire and two hot wires running at 180 degrees phase shift.

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No, it is not. There is only one phase (240V), and it’s divided into 2x120V by a center tap in the transformer on the pole or in the green box near the sidewalk. While it is somewhat common to refer to this as a “two phase” system, that is a misnomer, and the correct nomenclature is that it is a split-phase system. True multiphase power does exist in USA, but isn’t really used residentially. (Unlike in Europe, where true multiphase power is commonly used for home ovens, stoves, and some laundry machines.)

schmitt trigger:
And don’t get me started on Miles per Gallon vs Kilometers per Liter vs Liters per 100 Kilometers.
Simon:
litres per 100km alwoys confused me. I mean why?
Rerouter:
Just for coverage for an earlier point about Australia's air pressure, every bus and truck for at least the past 10 years, even the american brands, e.g. Kenworth, Mack, Freightliner, all use metric values on there clusters, Celsius for temperature, Bar / KPa for pressure, and mmH2O for things like filters.

Oddly enough its only the European luxury car brands that seem to come defaulted to PSI for things like Tyre pressure monitors.

Litres per 100Km vs km/L, It ends up kind of like the Fahrenheit vs Celsius argument, L/100 gives higher resolution when using whole numbers, E.g. comparing 2 trucks, one does 33L/100Km, the other 50L/100Km, flip that around and you get 3Km/L vs 2Km/L,
Simon:

--- Quote from: Rerouter on October 26, 2019, 08:55:20 pm ---
Litres per 100Km vs km/L, It ends up kind of like the Fahrenheit vs Celsius argument, L/100 gives higher resolution when using whole numbers, E.g. comparing 2 trucks, one does 33L/100Km, the other 50L/100Km, flip that around and you get 3Km/L vs 2Km/L,

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I can't help it if thick people can't do proper numbers! ;)
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