ground connection on dedicated line?

Thanks guys. Very insightful. It also seems I touched a hot spot for some, and that's fine. It's all well-intended feedback.

I should mention I'm not in the US. So maybe not illegal here. Point taken, though: one ground. What should the resistance be to be considered a good ground?

Alrau1: because I'm not in the US, can you please shed some light on what BX armored cable is, and what Romex is? I'm aware of copper and aluminum shielding, but not sure what BX stands for.

Thanks again

I should mention I'm not in the US. So maybe not illegal here. Point taken, though: one ground. What should the resistance be to be considered a good ground?

As for the US, as measured at the receptacle the resistance measured from the neutral to the equipment ground shall not exceed more than one ohm.......

Just connect the dedicated circuit ground back to the main panel.

A quick call to your local municipality will tell you whether you can do otherwise legally. Keep in mind that local electrical codes may add to national codes.

Romex is a brand name but it's often used as a generic name for your basic, standard house wire. BX cable is simply wire in a flexible metal sheathing. It's typically used in garages or inside a house when the wire is not buried in the wall, but is surface mounted. This is often done in older heritage homes that are retrofitted with electricity. Rather than rip up wall or ceiling plaster, surface mounted electrical cables and metal receptacle boxes are used. BX is a flexible metal conduit. Alternatively, rigid metal conduit is used.

Out here in the sticks we like to use BX in the walls, in case we get squirrels.

Lewinski,

Markphd is correct but his response might need clarification. Romex is one brand a type of insulated cable assembly generally containing, within its outer insulating sheath, 2 or 3 insulated conductors and an uninsulated ground conductor.
BX is a brand of steel or aluminum armored flexible conduit with insulated wires inside. In addition to protecting the conductors contained within, the armor serves as a ground conductor.
In the US, Romex and BX are used as generic terms, just like most of us call cellophane tape "Scotch tape" no matter what brand it is.