pig tails 277 lighting

[mryan]

I'm working for someone and I'm new to the trade and the superintendent is telling me that we don't need pigtails from the 4 square boxes to bond them. This is all running MC. Is this a code violation?

 

[stickboy1375]

I'm working for someone and I'm new to the trade and the superintendent is telling me that we don't need pigtails from the 4 square boxes to bond them. This is all running MC. Is this a code violation?

You need to bond the boxes. 250.148(C)

 

[jumper]

I'm working for someone and I'm new to the trade and the superintendent is telling me that we don't need pigtails from the 4 square boxes to bond them. This is all running MC. Is this a code violation?

Are you asking if bonding bushings are needed at the fittings, is the box required to be bonded or is the sheath of the MC considered an EGC for bonding?

 

[mryan]

Are you asking if bonding bushings are needed at the fittings, is the box required to be bonded or is the sheath of the MC considered an EGC for bonding?

Is the sheath of MC considered an EGC for bonding?

 

[jumper]

Is the sheath of MC considered an EGC for bonding?

Normal MC, nope. There are special types that are okay, M-Cap and such, not everyday stuff though.


250.118(10)
Type MC cable that provides an effective ground-fault
current path in accordance with one or more of the
following:
a. It contains an insulated or uninsulated equipment
grounding conductor in compliance with 250.118(1)
b. The combined metallic sheath and uninsulated
equipment grounding/bonding conductor of interlocked
metal tape?type MC cable that is listed and
identified as an equipment grounding conductor
c. The metallic sheath or the combined metallic
sheath and equipment grounding conductors of the
smooth or corrugated tube-type MC cable that is
listed and identified as an equipment grounding
conductor

 

[mryan]

thank you

 

[jumper]

thank you

No prob. You are welcome.

 

[stickboy1375]

thank you

So how many boxes do you have to go back and fix?

 

[Cow]

This is first period apprentice stuff where I'm from. I'd be worried if my super didn't know this.....

 

[stickboy1375]

This is first period apprentice stuff where I'm from. I'd be worried if my super didn't know this.....

We can't all possibly know everything... just the way it is... I've worked with numerous guys that still think a switch is required by a door...

 

[jeremysterling]

I gather from the OP that he is asking if the 4 square box needs to be bonded.

The answer is, "Yes."

Carefully read 250.148.

 

[KWH]

Is there a chance he was talking about a pigtail for the device.

 

[ActionDave]

There is also a chance they are using MCAP.

 

[hurk27]

Also see 250.97 since this is 277 volts

 

[kwired]

Normal MC, nope. There are special types that are okay, M-Cap and such, not everyday stuff though.


250.118(10)
Type MC cable that provides an effective ground-fault
current path in accordance with one or more of the
following:
a. It contains an insulated or uninsulated equipment
grounding conductor in compliance with 250.118(1)
b. The combined metallic sheath and uninsulated
equipment grounding/bonding conductor of interlocked
metal tape?type MC cable that is listed and
identified as an equipment grounding conductor
c. The metallic sheath or the combined metallic
sheath and equipment grounding conductors of the
smooth or corrugated tube-type MC cable that is
listed and identified as an equipment grounding
conductor

Just to clarify what you mentioned is MC-AP. It has a bonding strip within the cable just like AC cable has which makes the sheath suitable for use as an EGC. I wouldn't say this is not everyday stuff, just not been in the market for too long.