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Circuit breaker

This 1600A Dorman Smith CB has stood guard over a switch board for around 35years without, as far as I know, anyone going near it. I suppose I should ask DS but

anyone know what service arrangements, if any, that it should be subject to?6e567d0005e642e51bd16f75cda0b662-huge-ef209198-f081-4c9a-a8e4-6166da50e956.jpg
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  • Geoff


    I have it written in to my terms and conditions sent to the client in advance of starting work on site.


    We did an inspection on a very large installation where a 200A switch was installed in 1943 when the building was erected as a secret shadow factory for the DeHavilland aircraft company. The outside was heavily corroded and. I doubt if it was moved since installation. It was isolated for inspection and testing but it would not go back in. We borrowed a tin of WD40 from the site maintenance team an set about spaying the pivot points and prodding the springs and moving the parts with a screwdriver until it eventually went back in with a satisfactory clunk and no bang. Reported on the EICR as requiring replacement.
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  • Geoff


    I have it written in to my terms and conditions sent to the client in advance of starting work on site.


    We did an inspection on a very large installation where a 200A switch was installed in 1943 when the building was erected as a secret shadow factory for the DeHavilland aircraft company. The outside was heavily corroded and. I doubt if it was moved since installation. It was isolated for inspection and testing but it would not go back in. We borrowed a tin of WD40 from the site maintenance team an set about spaying the pivot points and prodding the springs and moving the parts with a screwdriver until it eventually went back in with a satisfactory clunk and no bang. Reported on the EICR as requiring replacement.
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