Earthing neutral

Ah, well in the built up areas the underground HV feeds will have an armour that is grounded - but further out the 11kV will be overhead and will normally be bare wires - we do not share HV and LV on the same poles, so bare HV is not as silly as it sounds. Some rural UK stuff to make it a bit clearer.

 typical 11kv overhead 3 phase 
small 'pole -pig ' 11kV to 400V 3 phase+N


The 3 white boxes on the pole are the outbound fuses for the LV phases. The thing at the top is a sort of open switch to perform 11kV isolation, and is operated by the long handle on the pole.


In town the HV and the LV will be buried, so there is not so much to see.  Just   one of these  per 200 houses or so. The buried cables have earthed armour, and again the 'what  is the likely voltage kick?' question decides if HV and LV earths are separated or linked, bit now the armour resistance is in the equation.

Ah, well in the built up areas the underground HV feeds will have an armour that is grounded - but further out the 11kV will be overhead and will normally be bare wires - we do not share HV and LV on the same poles, so bare HV is not as silly as it sounds. Some rural UK stuff to make it a bit clearer.

 typical 11kv overhead 3 phase 
small 'pole -pig ' 11kV to 400V 3 phase+N


The 3 white boxes on the pole are the outbound fuses for the LV phases. The thing at the top is a sort of open switch to perform 11kV isolation, and is operated by the long handle on the pole.


In town the HV and the LV will be buried, so there is not so much to see.  Just   one of these  per 200 houses or so. The buried cables have earthed armour, and again the 'what  is the likely voltage kick?' question decides if HV and LV earths are separated or linked, bit now the armour resistance is in the equation.