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    Earth Loop Impedance Testing

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    Earth Loop Impedance Testing

    "Glad we still have our rockets to get us to the moon and back" Seriously, I think we should continue this international dialogue as we can all learn something by sharing information. Doctors communicate medical information world wide why not electricians. The point of my post was to try to...
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    Earth Loop Impedance Testing

    If we are using TN_ CS here you would expect to have a fourth insulated wire run all the way back to the xtrm. Consisting of two live wire , neutral and earth. In the UK you would have only have 3 wires to accomplish this system Live, neutral, earth. Correct?& Earth rod at the xtrm?
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    Earth Loop Impedance Testing

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    Earth Loop Impedance Testing

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    Earth Loop Impedance Testing

    No test required by NEC to proof the single rod meets this 25 ohm requirement as I'm sure you'll agree
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    Earth Loop Impedance Testing

    I h I Know you use terminal strips but not sure if your regs allow some type of splice inside switch boxes ?Of course ,the more wire splicess pig tails , or terminal strips the more likely the chance of having a high impedance connection somewhere
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    Earth Loop Impedance Testing

    How many conductors do you have in your TN-NS Is it one L1 , one neutral,and earth all the way back to the trans former Eg is it One combined Concentric cable SWA with core neutral and outer armour used as main earth back to transformer Thank you for you replys
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    Earth Loop Impedance Testing

    It could be 90 + 90 degrees for a total 180 Ground rods are connected to the incoming neutral correct Separate Ground rod also connects to transformer at the pole that is correct? TT?
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    Earth Loop Impedance Testing

    We do use GFCI outlet(sockets) and breakers. What you call RCD in the UK I would like see Zs testing done here in the USA since we have so many prolems with loose wiring connections , call back and fires as a result. I think you have a really good system for testing in the UK and I know it is...
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    Earth Loop Impedance Testing

    I'm good with all you say above Our supply mains reads 240 volts between L1 & L2 and 120 volt to neutral or ground(earth) they are 3 separate conductors . Two hot wires and an insulated neutral. The two hot wires are I believe 90 degrees out out phase?Still considered single phase? Since they...
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    Earth Loop Impedance Testing

    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...
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