Should I ground the coil chasis?

Athosworld · Jun 16, 2023

I have this massage machine prototype that im going to install on a box and there will be a little of the coil vibrator chasis exposed. I already grounded it in the photo. Is this ok?ins

Diver300 · Jun 16, 2023

Yes, those exposed metal parts should be grounded.

JimB · Jun 17, 2023

Beware of using a plug-in breadboard for mains supply connections.

I would not do it!

JimB

Tony Stewart · Jun 18, 2023

Normally magneto-massagers are double insulated or more with external layers.

Athosworld · Jun 18, 2023

Tony Stewart said:
Normally magneto-massagers are double insulated or more with external layers.

This one is actually conductive
The metal looks like it has a coating but it actually doesn’t. The only thing separating the windings and the chasis is thin plastic paper

Tony Stewart · Jun 25, 2023

technically that's double insulated
- magnet wire
- paper insulation
> 3kV

Nigel Goodwin · Jun 26, 2023

Tony Stewart said:
technically that's double insulated
- magnet wire
- paper insulation
> 3kV

And certainly not something you want applying to your bare body - there are good reasons why most medical equipment is battery powered. Looks about as safe as a cheap home made submersible!.

Athosworld · Jun 29, 2023

Tony Stewart said:
technically that's double insulated
- magnet wire
- paper insulation
> 3kV

The paper only wraps around the coil
It does not insulate the coil wire top and bottom and the core of the coil

Diver300 · Jun 29, 2023

Athosworld said:
The paper only wraps around the coil
It does not insulate the coil wire top and bottom and the core of the coil

There is a plastic former that the coil is wound around that insulates the centre, top and bottom. The paper insulates the outer.

I would still earth the chassis.

Athosworld · Sep 17, 2023

Diver300 said:
There is a plastic former that the coil is wound around that insulates the centre, top and bottom. The paper insulates the outer.

I would still earth the chassis.

Late reply but could it like arc between the windings and the earthed/grounded chassis in a power surge?

Diver300 · Sep 17, 2023

Athosworld said:
Late reply but could it like arc between the windings and the earthed/grounded chassis in a power surge?

Yes, it could, but that is all the more reason to earth the chassis. Once there has been an arc between the windings and the chassis, the insulation will be compromised and the chassis will be a shock risk if not earthed. If you were touching the chassis when an arc happens, it will hurt at best.

Should I ground the coil chasis?

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