From: sciencescot@gmail.com   
      
   On Monday, 8 July 2019 00:55:55 UTC+1, Bob F  wrote:   
   > On 7/7/2019 4:22 PM, Scottish Scientist wrote:   
   > > On Sunday, 7 July 2019 19:15:30 UTC+1, Jim Wilkins  wrote:   
   > >    
   > >> My house has a 240V, 200A electric heat service capable of 48 KW, or   
   > >> 1152 KWH per day. My arc/TIG welder or plasma cutter can use close to   
   > >> half of its capacity.   
   > >>   
   > > The mains voltage in the USA is 120 Volts, not "240V", which is the mains   
   voltage in many other countries, but not the USA.   
   > >    
   > > You may want to check your voltage or check what country you are in Jim.   
   > >    
   >    
   > 240 VAC is available in most (all?) houses in the US. The 120 is either    
   > phase to ground, but large appliances use 240.   
      
   Thanks for the correction and my apologies to Jim.   
      
   "Why doesn’t the US use 220V like everyone else in the world?   
   Common question about household electrical power supply   
      
   It’s a common question tied to a couple of common misconceptions.   
   ....   
      
   For those who are surprised to hear households have 240V coming into the home,   
   the way it works is as follows: right prior to the residence entry, the line   
   transformer secondaries are center-trapped so as to provide split-phase 240V   
   on two hot legs (1    
   and 2) and neutral at the center tap (which is referenced to Earth at the   
   breaker box). For most home outlets, either leg 1 or leg 2 is used with the   
   neutral line to provide 120V alternating current to power small appliances   
   with a plug-in cord. In this    
   sort of set-up, there won’t be any outlet above 120V. Also, if you looked at   
   both legs at the same time, they’d both appear to be 180 degrees out of   
   phase from one another."   
      
   https://www.electronicproducts.com/Power_Products/Power_and_Cont   
   ol/Why_doesn_t_the_US_use_220V_like_everyone_else_in_the_world.aspx   
      
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