Diverse routing

Can anyone advise on any documentation with specific reference to diverse route distances, is there a minimum distance to keep separate LV & LSS containment when it is impossible to take them in an entirely different route ?

The example is buried ducts system for  separate a  LV and LSS Generator supplies to a building, they need to run from the TX and Generator location which are remote from the building, but have to run parallel to each other for a distance of 30/40 m as there is little option to do otherwise, can these run together with a space of 2-3m separation ? 

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  • That all depends on the fire risk assessment (or if for purposes other than fire, the relevant availability risk assessment).

    The separation to achieve 'diverse' is a function of the potential causes of any given single point of failure.

    So for example if the fire, flooding, or accidental impact event that affects one cable is able to affect a cable 3 m away, that is not 'diverse' ... but if the event is highly unlikely to, or cannot, simultaneously affect both cables, that could well be'diverse'.

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  • That all depends on the fire risk assessment (or if for purposes other than fire, the relevant availability risk assessment).

    The separation to achieve 'diverse' is a function of the potential causes of any given single point of failure.

    So for example if the fire, flooding, or accidental impact event that affects one cable is able to affect a cable 3 m away, that is not 'diverse' ... but if the event is highly unlikely to, or cannot, simultaneously affect both cables, that could well be'diverse'.

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