if you omit ground tail in a 5" box for receptacles but the mc cable has a ground

[sueshe55]

if you omit ground tail in a 5" box for receptacles but the mc cable has a ground

if you omit ground wire in the installation of a 15A receptacle but the mc used has a ground wire and all are splice together
back to panel to grounding bar is this acceptable?

 

[iwire]

250.148 Continuity and Attachment of Equipment
Grounding Conductors to Boxes. Where circuit conductors
are spliced within a box, or terminated on equipment
within or supported by a box, any equipment grounding conductor(
s) associated with those circuit conductors shall be connected
within the box or to the box with devices suitable for
the use in accordance with 250.148(A) through (E).
Exception: The equipment grounding conductor permitted
in 250.146(D) shall not be required to be connected to the
other equipment grounding conductors or to the box.

 

[AdamS]

Are you asking about not pigtailing a ground to the receptacle?

 

[GoldDigger]

Or are you just talking about using the bond wire of the MC as your EGC?

 

[J.P.]

I might not follow the wording of your question.

The ground wire in the m/c has to attach to the metal box and the yoke of the device in some approved fashion. Typically a ground screw and pigtailed to the yoke of the device.

They do sell receps with a copper grounding bit on the yoke. Still need that ground screw.......
It's cheaper to pigtail your wire IMO.

 

[infinity]

if you omit ground wire in the installation of a 15A receptacle but the mc used has a ground wire and all are splice together
back to panel to grounding bar is this acceptable?

A few things, if the standard MC cable has an insulated green EGC then it must somehow be connected to the box to ground the box. (MC-ap does not require any connection of the bonding wire within the cable). The EGC cannot connect only to the device. Once the box is grounded then us may use a self-grounding receptacle and skip the bonding jumper from the receptacle to the box.