In the USA we typically use a 120/240 volts 3 wire supply with a neutral for our residential mains conductors.
Example , they are run mostly overhead from a pole mounted utility transformer. There is only one wire feeding the primary side of the utility transformer located 300' away from the meter socket mounted on the side the house. We use the same basic type of earthing connection as UK for new construction. We do no Loop impedance testing here at all which is hard to believe in this day and age. I'm firmiliar with your testing schemes and was wondering if Ze test would read too high of an impedance through the earth 300' to the xtrm ??
Also we typically drive two 8'rods six feet apart with hopes of arriving at 25 ohms or less no test here either?? I hope to use a fluke 1650 model and was hoping some of you bright UK sparkies could share some on how to go about doing this test correctly?!
Example , they are run mostly overhead from a pole mounted utility transformer. There is only one wire feeding the primary side of the utility transformer located 300' away from the meter socket mounted on the side the house. We use the same basic type of earthing connection as UK for new construction. We do no Loop impedance testing here at all which is hard to believe in this day and age. I'm firmiliar with your testing schemes and was wondering if Ze test would read too high of an impedance through the earth 300' to the xtrm ??
Also we typically drive two 8'rods six feet apart with hopes of arriving at 25 ohms or less no test here either?? I hope to use a fluke 1650 model and was hoping some of you bright UK sparkies could share some on how to go about doing this test correctly?!