Wich way up and were to fit dehurst referse switch

[Martin NewboldParticipant @martinnewbold]

I have a Dupar Dewhurst Type A switch after giving up with the three phase rubbish thats for sale .I am curious about it as it has bolt holes in the bottom and a curve on the top which looks the correct way up . how is this mounted there are some odd mounts on ebay but no images on google on where to fit it. Can anywone hlp please?

[Martin NewboldParticipant @martinnewbold]

[Clive FosterParticipant @clivefoster55965]

Best practice is to set it vertical with the operating lever at the top with screws or bolts though the holes in the back onto a suitable bracket or machine surface. The alternative is to lay it on its back with the lever at the front. Wiring should run through proper armoured protection sleeves anchored in the large holes in the base.

Should be connected after the contactor / DOL "switch" / NVR switch. A Dewhurst is by design very slow actuating and will suffer contact erosion if used as a power switch. Used as direction selector before turning the power on it will last pretty much forever.

Clive.

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