tilden
Member
- Location
- Chapel Hill, NC, USA
We have a PV system with inverters that are adjacent to our array and are planning to use a short piece of flexible metal conduit to protect the PV conductors for the final few feet from when they leave the bottom of the array until they enter the inverter. Each end has a connector with plastic bushing inside for cable protection, and the end at the inverter will bond to the inverter via a lock-nut listed as capable of piercing paint to create a bond, so will qualify as bonded per NEC 2023 250.97 exception 3. This FMC will also contain a #6 bare ground wire to bond the inverter to the racking.
My question is whether we need to add a ground bushing to the distal end of the FMC underneath the array. This distal end of the FMC is not connected to any box or other metal component, so there is nothing that is being made continuous by bonding here.
We commonly use flexible nonmetallic conduit for this where no bonding is required at all, however this particular customer required all conduit to be metal.
Photo attached, and for anyone wondering - the fill and ampacity of those PV wires just barely works in that 1.5" FMC.
My question is whether we need to add a ground bushing to the distal end of the FMC underneath the array. This distal end of the FMC is not connected to any box or other metal component, so there is nothing that is being made continuous by bonding here.
We commonly use flexible nonmetallic conduit for this where no bonding is required at all, however this particular customer required all conduit to be metal.
Photo attached, and for anyone wondering - the fill and ampacity of those PV wires just barely works in that 1.5" FMC.
