Electrical grounding question

[chriscowles]

In my Mini-Lite, I have a circuit of 10/2 connected from an auto-transfer switch mounted on the back of the power center to the outside cabinet where my solar system will be installed shortly. I'll attach an plug which will always be plugged into the inverter.

The inverter has a ground lug on the outside. Do I need to attach a ground wire to it separately, or is it grounded by way of the ground wire in the 10/2?

I added a 15A circuit with 14/2 to the same space for a convenience outlet. That will be in a metal surface mount box. If the 10/2 grounded plug doesn't suffice as the ground for the inverter, I can run a ground wire from the inverter to the metal box with the outlet and tie it to that ground.

Does that work?

[Bama Rambler]

Most of the time that lug is a case ground for installations that require a separate equipment ground, but it's usually tied to the circuit ground. Tell us the make and model of the inverter and we can look it up.

[chriscowles]

Originally Posted by Bama Rambler

Most of the time that lug is a case ground for installations that require a separate equipment ground, but it's usually tied to the circuit ground. Tell us the make and model of the inverter and we can look it up.

Thanks for your offer of help. It's a Renogy 2000W 12V PSW inverter, SKU RNG-INVT-2000-12V-P2.

[Bama Rambler]

According to the diagrams I found, the grounds on that unit are tied together. They recommend that you run a #10 conductor from the lug to the frame of the RV, but it's just a recommendation and not a 'requirement', so it's up to you if you want to do that.

[chriscowles]

Originally Posted by Bama Rambler

According to the diagrams I found, the grounds on that unit are tied together. ...

Thanks. That's what I was looking for. Assuming the ground conductor in my 10/2 NM-B is intact, it seems sufficient to me to depend on it to ground the inverter.

[Bisquick2]

Wouldn’t you want the inverter case grounded to the chassis for when you’re not connected to shore power ground?