2 Original Case true false false false NE.2 Country house As a first case study a country house (Figure NE.1) is considered. Loss of human life (L1) and economic loss (L4) are relevant for this type of structure. It is required to evaluate the need for protection. This implies the need to determine only the risk R1 for loss of human life (L1) with the risk components RA, RB, RU and RV (according to Table 2) and to compare it with the tolerable risk RT = 10-5 (according to Table NF.1). Suitable protection measures to mitigate such risk will be selected. Following the decision taken by the owner that an economic evaluation is not required, the risk R4 for economic loss (L4) is not considered. 0 0.7 500 0 1 Primary Structure 0 15 20 6 0 2 1 0 0 1 0 Power supply 0 0 1 0 0 2 0 0 LS1 1 0 1000 0 0.5 1 -1 0 0 0 1 2.5 1 0 0.2 Telephone line 1 0 0 0 0 1 0 0 Whole line 0 0 1000 0 1 1 -1 0 0 0 1 1.5 1 0 1 Whole structure 0 7 6 0 0 1E-05 0.001 1 1 0 0 0 0 1 18 0 0 8760 7 24 52 1 0.01 1 0 0 0 0 false 0 0 0 false 0 0 0 0 0 0 0 0 0 0 1 0 0 0 false false false false false false false 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0.001 0.001 0.001 0 -1 Solution A true false false false To reduce the risk R1 to a tolerable value, the protective measures influencing the components RV and RB should be considered. Suitable measures include; installing SPDs of LPL IV at the line entrance (lightning equipotential bonding) to protect both power and telephone lines in the house. According to Table NB.7 this reduces the value of PEB (due to SPDs on connected lines) from 1 to 0,05 and the values of PU and PV by the same factor, 0 0.7 500 0 1 Primary Structure 0 15 20 6 0 2 1 0 0 1 0 Power supply 0 0 1 1 0 2 0 0 LS1 1 0 1000 0 0.5 1 -1 0 0 0 0.05 2.5 1 0 0.2 Telephone line 1 0 0 1 0 1 0 0 Whole line 0 0 1000 0 1 1 -1 0 0 0 0.05 1.5 1 0 1 Whole structure 0 7 6 0 0 1E-05 0.001 1 1 0 0 0 0 1 18 0 0 8760 7 24 52 1 0.01 1 0 0 0 0 false 0 0 0 false 0 0 0 0 0 0 0 0 0 0 1 0 0 0 false false false false false false false 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0.001 0.001 0.001 0 -1 Solution B true false false false To reduce the risk R1 to a tolerable value, the protective measures influencing the components RV and RB should be considered. Suitable measures include; installing an LPS of class IV (including mandatory lightning equipotential bonding). According to Tables NB.2 and NB.7 this reduces the value of PB from 1 to 0,2 and the value of PEB (due to SPDs on connected lines) from 1 to 0,05 and finally the values of PU and PV by the same factor. 0 0.7 500 0 1 Primary Structure 0 15 20 6 0 2 1 0 0 1 0 Power supply 0 0 1 1 0 2 0 0 LS1 1 0 1000 0 0.5 1 -1 0 0 0 0.05 2.5 1 0 0.2 Telephone line 1 0 0 1 0 1 0 0 Whole line 0 0 1000 0 1 1 -1 0 0 0 0.05 1.5 1 0 1 Whole structure 0 7 6 0 0 1E-05 0.001 1 1 0 0 0 0 1 18 0 0 8760 7 24 52 1 0.01 1 0 0 0 0 false 0 0 0 false 0 0 0 0 0 0 0 0 0 0 1 0 0 0 false false false false false false false 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.2 0 0.001 0.001 0.001 0 -1 BS EN 62305:2012 Annex NE Examples A. N. Other Contracting

1234 A. N. Other Street A. N. Other Town A. N. Other county ANOT HER

Annex NE Examples NA The following calculation is taken from Annex E of BS EN 62305-2:2012 The example was based upon the equivalent example contained within IEC 62305-2:2010 A. N. Other