calculating 230V

[blue eyes]

we make calculations based on a supply voltage of 230V, but in most installations the average is 245V.

now a fixed load of 6 ohms would have the following current increases
230/6 = 38.3A
240/6 = 41.0A
250/6 = 41.6A

my question is why do we use 230V when an average supply voltage is giving higher circuit currents that that calculated for been on the beer for a while now so i'm sure I have missed the point some where so my apoligies in advance

 

[ayjay]

its the other way around --hic---
Ohm's Law - The basics - Ohms Law Formulas Explained to save you time

 

[Geoffsd]

its the other way around --hic---

Not sure what you mean by 'the other way round'.

blue eyes is correct except the maths is not too good - 240/6 = 40.

230V (nominal voltage) is just a number used for design calculations to ensure everything complies with the regulations.

 

[blue eyes]

for example
a resistance or 8.52 ohms at 230V wil have a current of 27A flowing.assuming a 2.5mm multicore 70 Deg cable 4D2A ref b says 27A is fine (I am not looking at ccc as this is just to show my point.
the same resister fed on a 240V supply would pull 28.16A now the cable is not adiquite.
am I right?

- - - Updated - - -

sorry ref c

 

[snowhead]

now the cable is not adiquite
am I right?

No, because they allowed for that in the original calculations when they set the rating.

 

[blue eyes]

Not sure what you mean by 'the other way round'.

blue eyes is correct except the maths is not too good - 240/6 = 40.

230V (nominal voltage) is just a number used for design calculations to ensure everything complies with the regulations.

type error

 

[blue eyes]

No, because they allowed for that in the original calculations when they set the rating.

off course it has all fallen in place now
cheers
another beer then have one on me

 

[ipf]

Quite......or adequate

 

[GLENNSPARK]

for example
a resistance or 8.52 ohms at 230V wil have a current of 27A flowing.assuming a 2.5mm multicore 70 Deg cable 4D2A ref b says 27A is fine (I am not looking at ccc as this is just to show my point.
the same resister fed on a 240V supply would pull 28.16A now the cable is not adiquite.
am I right?

- - - Updated - - -

sorry ref c

the higher the potential difference...the more current can flow yes....