Please excuse the poorly phrased header - I am (hopefully not for long thanks to you) electrically dumb.

I'm looking at moving to a house in the countryside to live a more DIY lifestyle. Unfortunately, I don't speak the language of the landlord, and I'm going on information my Wife has shared with me.

She told me that the owner said the property has '3 x 25amp' power supply. The house is connected to the electrical grid. So, what does this mean - 3 x 25amp? What sort of power can I expect from this? Will it run a decent size fridge, plus computers, plus lights and kitchen appliances all at the same time? Or will I need to be balancing the load a bit carefully?

Is there more questions I need to ask the owner in order to make any intelligent decision on this matter? Like how many watts that is?

Note: this is in Europe, where the power is usually 220/240v.

2 Answers 2


230 Volts AC RMS x 3 x 25 Amps = 17.25 kilowatts power.

Your appliances are rated in Watts, add them up and see if the total is more than 17,250.

In most cases the rating is a peak rating (e.g. at start-up after a rural power-cut), the average will be less.

  • Great answer! I wasn't sure how to calculate the wattage - now I do. Thanks!
    – Bob
    Apr 29, 2013 at 11:42
  • That is comparable to (well, 72% of) the 24,000 watts which is the common power feed to USA homes, known for their big electric appliances. Apr 3, 2016 at 18:25
  • That rating is for a pole fuse (if it's anything like NZ), and is the maximum continuous load. Apr 4, 2016 at 0:27

3 x 25A is an odd way of saying it. However, 3 is a magic number in electrical power transmission, because 3-phase power is a common method of electrical distribution.


If so, you have a lot of total power, but only a limited amount on each phase. That tends to come up if you have large electric appliances like stoves, dryers, hot water heaters or large air conditioning units - consideration must be made so they aren't all stacked on one phase. Some (stoves, water heaters) are designed to use 3-phase if available.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.