I've been thinking, do disconnection times apply to MV? Say a fault occurs on the MV system. This would result in 3kv from the MV neutral to remote earth. In theory this voltage would end up on the LV neutral, enter the structure, cross over to the MET in a TN-C-S supply and then energize all metal connected to the CPC to 3kv. If someone is standing outside and thus away from the bonded foundation using a grill or none double insulated power tool would they not be hit with 3kv? How is this safe? I genuinely wonder about this.