[SamHam]

Is the mounting plate necessary? I've seen diagrams where both the shield and ground are connected together at the E terminal? Doesn't that accomplish the same?

[mactec54]

Is the mounting plate necessary? I've seen diagrams where both the shield and ground are connected together at the E terminal? Doesn't that accomplish the same?

No it does not accomplish the same, you can not add a tail ( wire to a shield ), it does not become very affective by doing this, any people showing this is bad information

You should have all your electronics mounted on a Metal plate which becomes the Ground Plane, you have a Bus or stud mounted on the Ground Plane the mains power supply Ground attaches to the Ground Plane to a Bus or a Stud then all your other Ground wires attach to this same point ( Star Ground Point )

Some equipment have built in Shield Clamps, a Shield to be affective must be Terminated by direct Clamping to a Ground plane

There is very little point in using a Shielded cable unless it is correctly terminated

[SamHam]

Ok, guess I need to rethink my layout.
Thanks for the info.
Hopefully I'll receive the unit in the next couple of weeks.

Sam

[mactec54]

Ok, guess I need to rethink my layout.
Thanks for the info.
Hopefully I'll receive the unit in the next couple of weeks.

Sam

Heads up you also need to use ( 1 ) power source for the whole machine I have a feeling you would of been using ( 2 ) supplies to your machine

240v supply 4 wire is needed then you can have 120v /240v for your machine and VFD Drive from the ( 1 ) source, then you won't create a Ground loop

[SamHam]

You are right - I was going to use a separate 110v circuit. I will change that now as I'm going to start the wiring this weekend.

A couple of things to clarify if I may:

In the US here our 220v consists or 2 110v legs, a neutral and a ground. I know that the two 110v legs (Black and Red usually) go to R and S or T. I believe that the Ground and not the Neutral goes to the Earth terminal. So the Neutral (White ) wire is not used at all. Is this correct?

Do I run a wire from the ground on ALL electronics to the plate such as control board, Breakout board, 42v power supply, 5/12v power supply, Or just from the power supplies?

[mactec54]

You are right - I was going to use a separate 110v circuit. I will change that now as I'm going to start the wiring this weekend.

A couple of things to clarify if I may:

In the US here our 220v consists or 2 110v legs, a neutral and a ground. I know that the two 110v legs (Black and Red usually) go to R and S or T. I believe that the Ground and not the Neutral goes to the Earth terminal. So the Neutral (White ) wire is not used at all. Is this correct?

Do I run a wire from the ground on ALL electronics to the plate such as control board, Breakout board, 42v power supply, 5/12v power supply, Or just from the power supplies?

The Power supply in NA is 120v /240v for single phase supply and has been for the last 54 years

For your VFD Drive it has to be wire R and T plus Ground, wire color can be any color that is code for NA so 2 Black Hot wires are fine Ground is Green or Green with yellow stripe

Yes the mains supply to your machine will have a Ground wire that connects to the Bus the Bus connects to your metal Plate ( Ground Plane ) all other electrical parts that have a Ground connection connect to the same Bus ( Star Point Grounding )

If you have any 120v needs in your cabinet then you need a Neutral wire for that, so your 240v supply will have 2 Hot / Live Wires a Neutral Wire and a Ground Wire supplying your machine

The Neutral is only used for the 120v supply this can not be connected to the Ground Bus that would be a safety problem if you did that

[SamHam]

Got it.
Thanks again for your info.
I'll keep you posted as I move forward

Sam

[darko9000]

I was going to the same thing. I was going to bring 110 and 220 to my control box but now reading this I'm not sure how to do this. My 220 does not have neutral wire just 2 black and the ground. How can I do this if you are saying I should not bring both grounds to cabinet to create ground loop? Can I still bring 110 to the cabinet (so I get neutral) just not use the ground wire? My 220 wire would then be used for all grounding

Thanks