correct cable sizing

[msmiffy1977]

can you help i am about to fit a siemens continuius flow water heater which is 13.2 kw. The distance from the consumer unit to the water heater is aprox 30m. Can you advise me on the correct cable size that i require and what the correct RCD that i will require plz

 

[ricicle]

Are you competant to be carrying out work of this nature to the required Portugese standards ?

 

[msmiffy1977]

I am competent but am unsure on the sizing of the cable can you assist plz

 

[GaryMo]

Is this work to be carried out in your current location, Portugal?

If so, you should post in the alternative section for Electrics Outside of the UK

 

[ban-all-sheds]

I am competent but am unsure on the sizing of the cable

It is not possible to be both of those things.

 

[msmiffy1977]

ahh cheers for that ive worked it out now myself i didnt realise i was on the wrong forum only been on here for first time today

 

[ericmark]

13.2Kw = 57.3913A and volt drop max UK standard 11.5v so 11.5/57/30 = 6.7 mV/A/m nearest to that is 10mm sq at 4.4 mV/A/m but depending on run you may 16mm to carry current you did not say how run.

 

[ronfam]

The cable sizes for electrical devices depend on the amperage and the type of wiring that will be used. For determining the correct cable size for an electrical application you may want to look at the wire size table at the following the location listed below:
http://www.ask-the-electrician.com/electrical-wire-capacity.html

 

[Paul_C]

The cable sizes for electrical devices depend on the amperage and the type of wiring that will be used. For determining the correct cable size for an electrical application you may want to look at the wire size table at the following the location listed below:
http://www.ask-the-electrician.com/electrical-wire-capacity.html

Useful for North America, but cable sizes in Portugal (and all of Europe) are completely different.