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NHSE HN (2003) 06: High Voltage 11kV switch - Reyrolle types OKSS, ROKSS and ROSS RMUs
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Document type:NHSE Hazard Notice
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Author:NHS Estates
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Published date:10 September 2003
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Primary audience:Professionals
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Publication format:Electronic only
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Gateway reference:NHSE HN (2003) 06
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Series number:NHSE HN (2003) 06
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Pages:1
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Copyright holder:Crown
A rubber cap which is clamped in place by a jubilee clip covers the filler hole on the cable box of this type of switchgear. The cap in turn is covered by a steel plate. The plate is not weatherproof. The initial defect found that the cap had perished allowing water to enter the cable box. Examination of similar switches has found further examples of deterioration. Information from the manufacturer indicates that the original OKSS rubber filler hole cap was superseded by the type used on ROKSS and ROSSS RMUs. An inspection of all rubber filler hole caps on this type of switchgear should be carried out at next maintenance opportunity.
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