hhsting
Senior Member
- Location
- Glen bunie, md, us
- Occupation
- Junior plan reviewer
Attached sketch from plans to the left shows metallic poles outdoor. On each pole their is light sign (S) for vacuum, vacuum itself and coin machine which activated the machine.
Attached sketch to the right shows inside the metallic pole. I have three branch circuit coming into the metallic pole from panelboards separate circuit breakers. First is 120V single phase with 2#12 + 1#12G to power vacuum. Second is 208V single phase 2#12 + 1#12G to power light sign. Third is 24V DC 2#12 + 1#12G to coin machine which sends signal to activate vacuum.
Following questions:
1. Is their any rule in NEC 2014 which states that conductor for each branch circuit once they enter metallic pole has to be in conduit, raceway so that conduit protects metallic pole from accidentally being energized?
2. Understand that NEC 2014 Article 250 requires circuit equipment grounding conductor to bond to the metallic pole to establish effective ground fault current path in the event pole gets energized so in the event metallic pole gets energized circuit breaker trip. Question is does each equipment grounding conductor from each branch circuit required to be bonded to the metallic pole total of 3 EGC from each branch circuits? If not then how does this work? How many EGC get bonded and how per code?
Attached sketch to the right shows inside the metallic pole. I have three branch circuit coming into the metallic pole from panelboards separate circuit breakers. First is 120V single phase with 2#12 + 1#12G to power vacuum. Second is 208V single phase 2#12 + 1#12G to power light sign. Third is 24V DC 2#12 + 1#12G to coin machine which sends signal to activate vacuum.
Following questions:
1. Is their any rule in NEC 2014 which states that conductor for each branch circuit once they enter metallic pole has to be in conduit, raceway so that conduit protects metallic pole from accidentally being energized?
2. Understand that NEC 2014 Article 250 requires circuit equipment grounding conductor to bond to the metallic pole to establish effective ground fault current path in the event pole gets energized so in the event metallic pole gets energized circuit breaker trip. Question is does each equipment grounding conductor from each branch circuit required to be bonded to the metallic pole total of 3 EGC from each branch circuits? If not then how does this work? How many EGC get bonded and how per code?
Attachments
Last edited:
