4.7.5 Power outletsThe provisions o

4.7.5 Power outletsThe provisions of 1.7.5/RD apply.4.7.6 FusesThe provisions of 1.7.6/RD apply.4.7.7 Wiring terminalsThe provisions of 1.7.7/RD apply.4.7.8 Battery terminalsTerminals intended for connection to batteries shall indicate the polarity according to IEC 60417 or be so constructed as to reduce the likelihood of improper connection.4.7.9 Controls and indicatorsThe provisions of 1.7.8/RD apply.4.7.10 Isolation of multiple power sourcesThe provisions of 1.7.9/RD apply.4.7.11 IT power systemsThe provisions of 1.7.2.4/RD apply.4.7.12 Protection in building installationThe UPS manufacturer shall state, as applicable, the rated short-time withstand current,(Icw) or rated conditional short circuit current (Icc). This current shall be equal to or higher than the Icp value stated in 5.5.4.3.1 (column 2 of Table 3).If an Icpvalue higher than that specified in Table 3 is stated, the following applies.a) If higher Icpstated ≤ 10 kA:the values corresponding to the next higher applicable line of Table 3 apply.b) If higher Icp stated > 10 kA:values 16 kA, 20 kA, 25 kA, 35 kA, 50 kA, 65 kA, 85 kA, 100 kA are preferred and the values corresponding to line 500 < I of Table 3 apply.NOTE 1 Examples of Table 3 line values to be used when a higher Icwor Icc is stated.a) If a 50 A UPS is declared to sustain Icw= 8 kA (instead of 6 kA), use the values of line 75 < I < 400 in Table 3.b) If a 1 000 A UPS is declared to sustain Icw= 85 kA (instead of 20 × 1 000 = 20 kA), use the values of line500 < I in Table 3.The installer can then verify that the prospective short-circuit current resulting at the a.c.input terminals of the unit is equal to or less than the value declared by the UPS manufacturer. Otherwise, subject to an agreement between the manufacturer and the user, a solution shall be procured. Such a solution may consist in employing external current-limiting overcurrent protectors or customizing the UPS accordingly.Irrespective of the UPS being a single unit or a unit in a paralleled system, the prospective short-circuit current of the a.c. input to be verified is that available at the relevant connection point of each unit.