double check my amps calculations

Discussion in 'General Electronics Chat' started by ozzylr, May 7, 2015.

  1. ozzylr

    Thread Starter New Member

    May 7, 2015
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    I am installing a tank heater which stated a 10000 watt heater. It has a 220 plug so ifPower equals E x I then I equals W/E or in this case 10000/220. Am I right.? Does the fact that the 220 is made up of 110 on each leg affect the formula or the overall current?
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,997
    745
    10Kw @ 220V = 45.4amps,
     
    Last edited: May 7, 2015
  3. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,542
    1,251
    No. 10 kW / 220 = 45.5 A. I'd say to use a 50 A breaker. but more experienced hands around here might recommend 60 A.

    ak
     
  4. Reloadron

    Active Member

    Jan 15, 2015
    963
    232
    Here in the US for a 10 KW heater load I would run a 240 VAC 60 Amp service disconnect fusible type (2 fuse) 3 wire using AWG 6 3 conductor. Your current will be as Analog stated 10 KW / 240 V = 42 Amps or if the mains voltage for your location is 22 then about 46 Amps. Just make sure for your local you use a correct wire gauge for the load and meet any other building or code requirements.

    Ron
     
  5. dl324

    Distinguished Member

    Mar 30, 2015
    3,247
    624
    How is the thermostat wired? Most residential will only operate one heating element at a time (top then bottom).
     
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