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Wiring advice for small single phase lathe in home workshop

I am being asked to wire up a small single phase lathe in a home workshop.

I will be using an NVR switch for start and stop, with a 0.55kw motor looks like I should have overload protection as well (552.1.2)

The customer has an old forward/reverse switch, my guess is 30 years old with metal case , but looks in good condition. My specific concern is that the switch has a leaver to rotate it and a center off position, it could easily be used to switch the motor off and then knocked on.The customer is quite safety conscious so fairly unlikely to happen, but I am wondering if this is normal or is there an alternative arrangement used? Just realised I my have to change the switch anyway as it's not ip rated, but still not sure what to use.

Tried to attach some pictures but cant work out how to do it? 

Parents
  • Reading 553.1.201 literally, I'm drawn to the ambiguity of the word 'use'; household and similar location vs. household and similar application. Pragmatically, it is referring to the means by which users connect everyday appliances in locations with typical risks and environmental factors. Conversely, I have transportable machinery and devices in my house that consume currents much to high for BS1363; they are not used for business but nor are they typical of domestic appliances.

    Anyway, I didn't want to drag the thread off topic by mention of an alternative to BS1363 which I agree is suitable for this lathe, but I found the points raised interesting because I don't get involved with domestic installations.

  • Pragmatically, it is referring to the means by which users connect everyday appliances in locations with typical risks and environmental factors.

    That's an interpretation ... as I said, only a court can decide, hopefully that won't be after a child or vulnerable person has poked something into the outlet.

    But I'm not 100 % sure I'm with you on the word 'use'.

    Let's take a step back and think about the wider context here, based on the example of 'poking things into the outlet. Workplaces have legal duties for risk assessments and appropriate safety controls - and employers are vicariously liable for the acts or omissions of their employees. Those provisions are somewhat absent in homes, although the homeowner still has duties of care. So is it possible the real intent of the protection is not necessarily related to the 'use', or really not just the 'user', but 'people in the premises as a whole', who might be impacted if the shutters weren't there?

  • A BS EN 60309-2 (Classified to clause 6.1.5 of BS EN 60309-1) socket and plug would be safe.

    "The requirements for socket outlets have been redrafted to prevent the socket contacts being live when accessible. Regulation 708.55.1.1 requires that every socket-outlet or connector shall either comply with: a) BS EN 60309-2 and shall be interlocked and classified to clause 6.1.5 of BS EN 60309-1:1999 to prevent the socket contacts being live when accessible;"

    Z.

  • not so easy to arrange on the tail end of an extension lead to a caravan or similar to an inlet box on fixed equipment.


    Either the standard sockets need shutters like BS1363 or we have to assume that like the bayonet lamp holder it is not as much of a risk in practice as we thought.
    I must admit that backed by RCD I'd not be worried even in a domestic setting - I have to say that, as I have quite a few single and 3 phase leads with outlets like this myself..
    Mike

  • Yeh but a fixed flex from the lathe or wall starter to a plug would be safe. No extension lead necessary.

    Z.

  • The requirements for socket outlets have been redrafted to prevent the socket contacts being live when accessible. Regulation 708.55.1.1

    Slightly different, as non-household.

    Which manufacturer is that outlet?

    Scratch that, Gewiss GW 66004 and GW66015 for 16 A and 32 A versions. Gewiss also do the non-isolated type.

    I've yet to come across one so clearly marked with the isolation symbol as that one seems to be, so looks good to me, and glad they're starting to come through now!

Reply
  • The requirements for socket outlets have been redrafted to prevent the socket contacts being live when accessible. Regulation 708.55.1.1

    Slightly different, as non-household.

    Which manufacturer is that outlet?

    Scratch that, Gewiss GW 66004 and GW66015 for 16 A and 32 A versions. Gewiss also do the non-isolated type.

    I've yet to come across one so clearly marked with the isolation symbol as that one seems to be, so looks good to me, and glad they're starting to come through now!

Children
  • I believe the symbol is present on the front of some, but possibly not all, 'ILME' SQE-series interlocked socket-outlets we have in the workshop. It is not visible on the first few example images of this product that I found online just now.

  • It is not visible on the first few example images of this product that I found online just now.

    Agreed - from someone's post above, I noted that Gewiss now have a range that are marked for isolation (although also apparently a range that are not - so not all Gewiss are isolation switches).

  • Can somebody turn me some ends for corroded  power steering cooling pipes on a vehicle?

    They are similar to the fittings on the end of brake pipes but are an unusual size/thread.

    Z.

  • Eh?

    Have you got a picture?

  • The answer has to be a resounding maybe, because size, material, thread dia and pitch all affect the answer and all critical dimensions and acceptable tolerances  are needed, and if I did it won't be very quick as my workshop is out of order for a few weeks being in mid move.  (And due to its era, my lathe can only cut thread pitches you can reach from 8TPI with a limited set of primary gear changes  so you may need to buy the right tap /die.)
    If those limitations are acceptable, if you can post a dimensioned drawing that may aid discussion.
    But, but far more interesting,  just how fast are you doing corners that your power steering needs cooling ?

    M.

  • Chris I will try to get pictures.

    Mike, the power steering fluid cooling pipes are original by the manufacturers. The vehicle is international, and may have been used in hot countries.

    Z.

  • Pictures. I had to saw through the  pipes to get a socket onto the fittings to get them to turn for removal. They were rusted onto the steel pipes.

  • Pitch believed to be 1.5mm.

    Z.

  • Lots of thread drift here, so I have started a new thread in Engineering Discussions.

  • In what?

    Z.