gecco
Member
- Location
- Hot Springs, AR, USA
I am consulting for an industrial client and handling the project management which entails conducting contractor pre-bid meetings. During a recent walk-through I pointed out an existing enclosure and advised the electricians to use it to install two new VFD's and components. One of the electricians protested stating that if they were to install more than 8 components to that existing enclosure it would have to be recertified by UL or else the local AHJ would not pass the installation. My dilemma is that the existing installation (enclosure with one VFD, fuse block, contactor, line and load reactors, etctera) was never 'listed' in the first place, it was built on site by the client's personnel. My way of thinking leads to me say that as long as all the components are 'listed' and the work is done in accordance to the NEC by qualified personnel then we can add the new VFD's and components. I know it's going to come down to the local AHJ but I'd like to make a case at least. Can someone give me some direction? As a plan 'B', what's the difference of mounting components in the enclosure versus mounting them on the wall on a piece of din rail? The room is dedicated to VFD mounting and is only accessible to qualified personnel. The installation would be under engineering supervision as well.
Thanks..
Thanks..