RCD Tripping

if you have airline try blowing everything out for a few mind and then try again ay work.

Good Luck Bee.M

Basically the NVR goes between the wall socket and the Dewhurst switch. Preferably in a location that is easy to reach when operating the lathe.

John

Edit: Spelling 

Edited By Journeyman on 26/02/2021 18:53:13

Thanks John and Brian.

Good morning to all. After following all the advice here I managed to fix the motor. Thank you to all who have chipped in their advices and instructing me on what to do.

This is the culprit, this wire I believe is the earth. Repeated rotation of the motor caused it to rub on the housing and the wire plastic over time becomes brittle and the mounting snapped. The wire then went inside the mounting where I could not obviously see and seems to look like its still connected and Its likely shorting out and tripping the RCD. I cleaned everything dried up the motor for a good 1 hour with the heater and replaced the wire and fully tightened everything. I also cleaned the dewhurst switch and dried everything up. Restarted the motor and all went well. I will get a NVR switch as advised. Again thank you all for helping me out.

Best wishes to all,

Raphael

Strange Raphael as that is the connection of earth from motor to the motor mounting frame, required to give continuity because of the flexible mounting method. Looks like it had a ring terminal connected to 1 of the through studs to make the connection.

That wire being disconnected would not cause your trip to function so more likely you rectified the fault by other means, perhaps the fan did the trick. In any case good you are running again.

Emgee

If your S7 motor has ventilation slots to help motor cooling,a known problem is swarf falling or thrown into the slots a,resulting in various electrical faults including power tripping and motor shorts leading to motor burn out, this can cured by fitting an aluminium or steel shield over the motor ,allow some space for airflow and do not foget a shield will cover motor bearing lubrication points if fitted. Another fault,which arised in my workshop is long damp periods due to the rain, insects can get into swichgear,or 13 amp skts, spiders are worst with their webs,the insect or the web gets damp and thrws the trips. My solution a long time ago was to seal all the cable entries and any unused mounting holes with mastic,no more problems until a month ago,lighting circuits were ok it was just the ring main around the shed,9 sockets to check,so it was a case of checking each socket in turn it was the 8th one that had the spiders web.All cleaned now and tripping stopped, it was so long ago that I sealed the sockets that the mastic had hardened a shrunk and let insects in,another job to do. Then I had a thought ,last year we put the freezer in the garage and that has its own ring main with trips,so those sockets need checking I have also placed a red neon warning light visible through the garage window so that I can check the electrics are on,Could cause a lot of domestic upset if the freezer circuit tripped and was not noticed.