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Maximum current for a unit supplied from a 13A socket, taking supply voltages into account.

Anthony Hoare
I am currently developing a heated food merchandising unit to be supplied from a 13A three pin plug.


If the unit is designed around 230V, 13A,  do I have an issue when the supply voltage is at the top of its tolerance (230V + 10% = 257V).

As I have a purely resistive load, the current drawn would be 14.3A

Is this an accepted method or should the unit be designed around 257V 13A?


Your help would be appreciated.


Tony Hoare
  • Former Community Member
    0 Former Community Member in reply to Zoomup
    Voltages and power levels are a bit different for boilers. The Ideal 30kW combi, which means the energy consumption of 1,000 joules for 1 second, so 30kW is defined as 30,000 joules for one second.
  • Former Community Member
    0 Former Community Member in reply to Zoomup
    Voltages and power levels are a bit different for boilers. The Ideal 30kW combi, which means the energy consumption of 1,000 joules for 1 second, so 30kW is defined as 30,000 joules for one second.
  • Former Community Member
    0 Former Community Member in reply to Zoomup
    Voltages and power levels are a bit different for boilers. The Ideal 30kW combi, which means the energy consumption of 1,000 joules for 1 second, so 30kW is defined as 30,000 joules for one second.

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