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Non-Conducting Location.

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To reduce costs I am considering creating a non-conducting location in a wooden holiday chalet.


The maintenance of the wooden building will be by skilled and instructed persons only.


The chalet is wooden framed and has wooden external ship lap with a water proof membrane in between the outside ship lap and inner plasterboard. . The roof is glass fibre. The wooden floor is supported on wooden joists on a concrete base. The flooring will be vinyl coverings. All window frames are plastic.


The main water supply pipe is plastic. There is no gas supply at all either mains or bottled gas. 


There are no extraneous-conductive -parts.


No outside equipment will be used.


All wiring accessories will be all insulated.


Appliances can be separated by at least 2.5m distance.


Can I safely apply 418.1.3?


Thanks,


Z.








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  • 0

    However there’s the cost of the double pole MCBs.



    Why would you need DP MCBs? There's no requirement for ADS in an non-conducting location situation (unlike a separated system for more than one item of current-using equipent) - you can't have faults to PE as there are no PE (or true Earth) in the location. All you have left is L-N faults and overloads and a SP MCB (or simple fuse) will deal with those adequtely. You might need a DP device for isolation, but presumably you've still got the main switch for that.

        - Andy.
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  • 0

    However there’s the cost of the double pole MCBs.



    Why would you need DP MCBs? There's no requirement for ADS in an non-conducting location situation (unlike a separated system for more than one item of current-using equipent) - you can't have faults to PE as there are no PE (or true Earth) in the location. All you have left is L-N faults and overloads and a SP MCB (or simple fuse) will deal with those adequtely. You might need a DP device for isolation, but presumably you've still got the main switch for that.

        - Andy.
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