IEC 60364 Table 48A

Source loop conduction is the idea that high admittance between the line and CPC/metal work at any point that a fault is capable of occuring can trigger disconnection of the over current device rapidly enough to prevent physiological harm and fire to the property. Basically a more evolved theory of ADS.

It sounds like the ADS part of the old EEBADS approach - or is there more to it than that?


(I've got in the back of my mind that Earthing is more than just about triggering ADS - it also keeps the entire LV system at a known voltage w.r.t. the general mass of the earth, and prevents it being dragged to other voltages by other systems - e.g. by capacitive coupling to HV circuits via the supply transformer, or other near-by systems -  protecting not just people from shock by the insulation of the conductors too.)


  - Andy.

Source loop conduction is the idea that high admittance between the line and CPC/metal work at any point that a fault is capable of occuring can trigger disconnection of the over current device rapidly enough to prevent physiological harm and fire to the property. Basically a more evolved theory of ADS.

It sounds like the ADS part of the old EEBADS approach - or is there more to it than that?


(I've got in the back of my mind that Earthing is more than just about triggering ADS - it also keeps the entire LV system at a known voltage w.r.t. the general mass of the earth, and prevents it being dragged to other voltages by other systems - e.g. by capacitive coupling to HV circuits via the supply transformer, or other near-by systems -  protecting not just people from shock by the insulation of the conductors too.)


  - Andy.