I have an application where I have 24.94kV via an underground duct bank coming into a 24.94kV pad-mounted switch. The switch in turn feeds a step down transformer (24.94kV-4.16kV). The switch and the transformer are enclosed in an enlcosed area surrounded by concrete walls. The switch and transformer have a buried ground loop around them that are tied together. The concrete walls are held up by steel columns. Does the NEC require the steel columns to be bonded? If so where is this requirement in the code? The steel columns are located about 7 to 8 feet from the electrical equipment. The only thing I can find in the code is the requirement for the bonding of steel columns in a building.
Bonding steel columns holding up walls around electrical
- Thread starter jnh
- Start date
- Status
- Location
- Bremerton, Washington
Re: Bonding steel columns holding up walls around electrical
If this is a service, you need a grounding electrode system, which is all the available electrodes, including structural metal. See 250.50 and 250.52
Same for a feeder, by the way.
If this is a service, you need a grounding electrode system, which is all the available electrodes, including structural metal. See 250.50 and 250.52
Same for a feeder, by the way.
- Status