Ground

[wireday]

Omron limit switch ZE-NJ-2S will be used on overhead door, It has a metal body but no place to attach a ground wire. Any ideas on grounding? Is it allowed to let the door track its screwed to be the ground?

 

[Dennis Alwon]

If you use a raceway that is compliant as a ground- Like emt then the unit is grounded. You can also drill and tap a hole.

Is it low voltage, if so it is a non-issue

 

[wireday]

Tight area for emt, no place to drill/tap its a compact switch, 120 volt, was planning on using LTFMC

 

[ptonsparky]

Properly installed LTFMC should be good for an EG.

 

[wireday]

I should have typed LFMC

 

[ptonsparky]

I should have typed LFMC

It's metallic, correct?

 

[wireday]

Yes

 

[ptonsparky]

350.60 & 250.118(6)

 

[augie47]

Note from the cut-sheet, the switch is available with a ground terminal.

http://products.omron.us/Asset/ZE_ZV_ZV2_datasheet_en_201008.pdf

 

[wireday]

If this limit switch is mounted to the overhead door frame that is bonded and grounded, does that provide a acceptable eg?

 

[ptonsparky]

If this limit switch is mounted to the overhead door frame that is bonded and grounded, does that provide a acceptable eg?

No.

250.134(B) With Circuit Conductors