RCD Rating

[wildgoose]

If you wanted to do a really quick calc for max demand, without consulting the diversity regulations, then add up all the breaker ratings and then multiply this summed value by 0.4

That value won't be too far off but this is an approximation AND NOT the recognized method for doing it.

 

[Engineer54]

If you wanted to do a really quick calc for max demand, without consulting the diversity regulations, then add up all the breaker ratings and then multiply this summed value by 0.4

That value won't be too far off but this is an approximation AND NOT the recognized method for doing it.

It's a dammed sight more accurate than the recognised method of doing things!! ...lol!!
You'll only ever get an approximation, whatever method you use!!!!