This Is a outside concrete tank with metal railling around the tank. There are motor starter saftey switches attached to metal strut and the strut is attached to the railling. The conduit feeding the enclouser has a ground conductor in the conduit and that ground is attached to the ground lug. Is the railling considered grounded under 250.136 (A) 2008 NEC
Grounding Metal Hand Rails
- Thread starter lmtis
- Start date
- Status
- Location
- Logan, Utah
A railing is not considered electrical equipment, but with that being said, I would say that the railing would be bonded by the fact that it is solidly connected to a grounded and bonded metal enclosure.
Chris
Chris
- Location
- Massachusetts
I agree with Chris, the only items likely to energize the railing are items that are already required to be bonded/grounded.
I have this installation on a project and the local inspector is requiring that the railling be grounded from the safety switch ground bar to a ground clamp attcahed to the railling with a #12 wire. There are 15 such locations on this tank.
- Location
- Logan, Utah
erickench
Senior Member
- Location
- Brooklyn, NY
NEC 250.4(A)(4) state's that all non-current-carrying electrically conductive materials that are likely to become energized must be connected together and to the electrical supply source in a manner that establishes an effective ground fault current path.
True. But for one, likely to become energized is always debatable for anything which is not intentionally energized. Second, it does not say the conductive parts must be grounded with an EGC... it only says that they be connected together.
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