Bad Vibrations...

[Paul]

So on my MM I seem to have an earthing issue where the lockdown bar (and any adjoining metal) gives you a slight buzz when rubbing your hand on it whilst touching an adjacent pin's lockdown bar.
I know it's earthing related, however not sure where to start - they are both powered from the same socket (which is of course earthed) - I could just bond the metal again to earth, however suspect it's due to something else as i seem to get a good continuity between earth and the metalwork itself.

Suspecting there may be a single cause to this. Any suggestions on how to localise??

 

[Sgt GrizZ]

You double checked that all ok in the plugs and at the sockets ?

 

[Paul]

Yes - Doesnt happen on anything else - just between MM and any other single machine on the same outlet - if i touch STTNG and one of the fruities next to it it's fine, however whenever MM is included i get the bad vibrations.... so localised to just that machine

EDIT : Thinking about it, it did this in my old place too, so deffo not a feed issue...more of a machine issue...

 

[kevlar]

Can you measure a voltage between the 2 lockdown bars?

 

[Sgt GrizZ]

Need to start checking all the earthing in game I reckon - braid, backbox connections, box near the coin door etc

 

[Paul]

Will try to find my Martindale tester today to check the earths on the extensions etc. I seem to have approx 3.5v AC between all the items connected.... (oops!!)

Paul

 

[Carl Spiby]

There's some machines onsite where if I touch metal bits on different machines with each hand, I get an actual shock...

 

[replicas]

There's some machines onsite where if I touch metal bits on different machines with each hand, I get an actual shock...

Then Don't do it.

 

[Carl Spiby]

It wasn't on purpose I just casually leant against them, I don't go round touching up machines.

 

[alphanu]

I have a similar issue, seems to be a fairly common one then? What's the solution? The cabs all seem to be grounded ok?

 

[Paul]

Ok - Have checked all the cabling with a Martindale tester (http://martindale-electric.co.uk/martindale-classic-check-plug-240v-socket-tester-p-277.html) and all is as should be i.e. Earth is connected through.

Will investigate further tonight.....