continuity testing and then adding to the measurement of Ze would be an acceptable alternative[...] to the measurement Ze' method the only safe way of determining the Zs on such [...]
than two years old. Current Zs is less than 1 ohm, Ze not taken yet. We are about to embark on serious intrusive testing and inspection. Has your team ever encountered this situation/ It's an interesting
as the source of supply for the outgoing sub - mains and a Ze measurement made with the Main Equi[...] as that recorded for the Ze at the main site DB. (There is a large amount of 'earthy' structural steelwork
[...] 13 x 560/1000 = 21.1V. This must be wrong. I have test results back: Ve = 236V[...] could also show how to calculate Ze for this, I would be grateful. Also, I know that Zs = 0.24 ohms. Does Ze
In a TNCS installation with 2x240mm supply neutral BS7671 states a 50mm earth bond is required to gas, water etc. Two outbuildings have gas and water with incoming 15mm copper pipework. How do we effectivly terminate 50mm cable to 15mm pipe
I understand that any electric shower installed be it in a tt system , tncs or pme should have rcd protection . Is this statement true or is it dependent on supply characteristics and protection [...]
[...] tripple pole mcb with solid neutral link. Am i right or wrong in thinking that the neutral should not be switched. This is a TNCS 3phase supply many thanks Terry
[...] deviation when carrying out a PIR on a dwelling with a marina mooring at the bottom of the garden. The supply to the installation is TNCS and there's a 16A industrial socket outlet connected to this system on the rear of the property providing power via a trailing [...]
I understand that the calculation for determining touch voltage is Ze x the rated ma of an RCD. If for example a TT Ze is 200 ohms and the main RCD is rated at 100ma the calculation [...]
[...] allowed for me to convert a TN - S system to a PME system without informing the supply company first. This is because of high Zereadings from the main supply. If this is not possible what do I have to do to overcome the high readings where [...]
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