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Can a DNO Service Cut-out be used as the primary source of fault current protection, when the DB it supplies is more than 3m from the intake?

Dill Jotter

I attended a site where the DNO (100A 1361) feeds a 100A Sw/ disconnector (with solid un-fused links) this then supplies a DB located in an adjacent room with 100A 60947-3 main switch.

Is this acceptable as the only fault current protection is afforded by the DNO. 

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  • 0

    If the DNO does not agree to its fuse providing fault protection, how do they prevent it from doing so?

    And how does that sit with any additional fuse fitted likely being of the same rating?

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  • 0

    If the DNO does not agree to its fuse providing fault protection, how do they prevent it from doing so?

    And how does that sit with any additional fuse fitted likely being of the same rating?

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