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當n根電纜并聯(lián)時，需要將表中給出的值相乘
乘以n。如果電纜長度（Lact）不是10 m，則需要乘以
表中由以下系數(shù)給出的值：
6.3.2故障點短路功率的計算
確定電路中某一點短路功率的規(guī)則
安裝時，根據(jù)各元件的短路功率
該電路類似于與等效計算相關的電路
進入權特別地：
•串聯(lián)元件的功率等于
單功率的倒數(shù)（如阻抗的并聯(lián)）；
•并聯(lián)元件的短路功率等于單個
短路功率（如阻抗系列）。
電路的元件被認為是串聯(lián)或并聯(lián)的，參見
來自故障點的電路。
在不同支路并聯(lián)的情況下，電流在
當短路電流在
已計算出故障點。必須這樣做，以確保正確的選擇
安裝在分支中的保護裝置數(shù)量。

With n cables in parallel, it is necessary to multiply the value given in the table by n. If the length of the cable (Lact) is other than 10 m, it is necessary to multiply the value given in the table by the following coefficient: 6.3.2 Calculation of the short-circuit power at the fault point The rule for the determination of the short-circuit power at a point in the installation, according to the short-circuit power of the various elements of the circuit, is analogue to that relevant to the calculation of the equivalent admittance. In particular: • the power of elements in series is equal to the inverse of the sum of the inverses of the single powers (as for the parallel of impedances); • the short-circuit power of elements in parallel is equal to the sum of the single short-circuit powers (as for the series of impedances). The elements of the circuit are considered to be in series or parallel, seeing the circuit from the fault point. In the case of different branches in parallel, the distribution of the current between the different branches shall be calculated once the short-circuit current at the fault point has been calculated. This must be done to ensure the correct choice of protection devices installed in the branches.