Sunday, Nov 06, 2011 at 11:16
Hi Stu
THAT was far from a detailed explanation
It was just a quick outline of the potential problems
The problems are due to the many different methods that have evolved over time in each country
Different methods of supply , approaches to/method of earthing ,
[four different approaches to earthing are in use] general methods of wiring, supply voltages, even the purity of the supply voltage[New Zealand as an example which requires a different type of RCD to Aus], approaches to safety
That's to just name the main ones
The standards do not list All the thing one cannot do, just because some one thinks they can do something just because it does not say NO in standards shows how little they understand!!
Also the Standards lag behind developments
New rulings are made from time to time which obviously cannot be in a Standard until it is revised
Back on OT
It is not as easy as simply fitting a step down transformer to the incoming supply
even tho one supplier suggests it is.,& high lights that their transformers are fully isolated
That brings in the same problems of any fully isolated supply [
inverters , generators] being used with multiple class 1 devises !!
A whole new hotly debated subject!!
I will repeat I "BELIEVE" the use of step down transformer are NOW not approved
As I said I may be wrong & I did not bookmark the reference so cannot confirm
I did not state it as "FACT"
Yes ,it is VERY complicated. & not as simple as just reading the Standards
One also needs to KNOW just what has been done in accordance with the other country's STANDARDSi
Peter
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