1930 Eicr

But with AC it is easier to fight the no-let go. To be fair to them at the time that EICR was written the body of knowledge and research work we now have on shock current, mortality, and the interaction of AC frequency and  shock duration on the heart rate were all more than the 30 years into the future. The commercial driver, as noted was that AC can be transformed up and down for long distance low loss transmission, and the desire to get the generating plant out of town and to somewhere that coal could easily be delivered was becoming pretty much  irresistible. (as demand grew beyond the sort of thing you could put into the basement of a normal building.)

We know how short the last  leg of the 230V/400v mains distribution is  today and how uneconomic the cable size becomes when it has to be much longer than about a metre or two per volt of supply  (hands up if your transformer is  much more than 500yds from your property ? - no, not many of us is it...) But you would not expect to see generators at the density that we install transformers, it is very impractical, - except perhaps at a fair ground or pop festival, where it is very noticeable, and keeping them all fueled is a procedure in itself.

Mike.

But with AC it is easier to fight the no-let go. To be fair to them at the time that EICR was written the body of knowledge and research work we now have on shock current, mortality, and the interaction of AC frequency and  shock duration on the heart rate were all more than the 30 years into the future. The commercial driver, as noted was that AC can be transformed up and down for long distance low loss transmission, and the desire to get the generating plant out of town and to somewhere that coal could easily be delivered was becoming pretty much  irresistible. (as demand grew beyond the sort of thing you could put into the basement of a normal building.)

We know how short the last  leg of the 230V/400v mains distribution is  today and how uneconomic the cable size becomes when it has to be much longer than about a metre or two per volt of supply  (hands up if your transformer is  much more than 500yds from your property ? - no, not many of us is it...) But you would not expect to see generators at the density that we install transformers, it is very impractical, - except perhaps at a fair ground or pop festival, where it is very noticeable, and keeping them all fueled is a procedure in itself.

Mike.