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Calculations as EDD Book

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    TDL=150 KVA as a maximum load  of  each  feeder   pillar

    In (Design Current) = 

    √   = 

    √  =  21

    Power=150 kVA, V= 400 Volt  

    It  = 

    C  g = 0.59 

    Groups Factor   from Table  2.4 EDD Section 14 

     Assuming Cables Laid  touching each other  as wors

     And  5  circuit  cables laid  together  as Installation M

    C d  = 1.00 Depth Factor   from Table 4B4 BS7671:2008 IET  Wir

     Assuming the Depth is 0.7  meter. 

    C a= 0.89 

     Ambient  Temperature Factor   from Table  2.4  At  50°  C  and   XLPE  Cables. 

    ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐

    It  = 

    .

    . . .= 

    .

    .  = 412.392 

    ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐From Table  2.11 of  (XLPE  Cable Current  Carrying Capa

     240 mm 2 Cable Current  Capacity  is 435   A ˃ 412.392 It  

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