malachi constant
Senior Member
- Location
- Minneapolis
We're looking at replacing a freestanding main entrance switchboard (2000A, 208V/3p/4w, if it matters). The existing switchboard contains one incoming/main section, and three distribution sections - the new one will be basically the same. For a number of good reasons we are looking at locating the new switchboard in the same room, about eight feet away, parallel to the existing equipment, on an exterior wall. At first glance this will be a very clean installation and switchover, but looking closer there is one detail that is bugging me. There are very few conduits coming out of the top of the equipment, and as we can see the back, front and sides we have every reason to believe most of the conduits are fed from below. We are on grade, there is no crawl space or basement below. We do not want to leave this in place as a massive pullbox - we want it gone.
My first thought was to write up the contract documents to state contractor shall cut and trench the floor from old gear to new, and intercept and extend buried conduits as required. Unfortunately the conductors will almost certainly not be long enough to reach the new switchboard. So can I have the contractor cut a pull box into the floor under (or immediately adjacent to) where the switchboard presently sits, and then pipe from there underslab over to the new switchboard? Is this a bad solution? What would you do?
Thanks!
My first thought was to write up the contract documents to state contractor shall cut and trench the floor from old gear to new, and intercept and extend buried conduits as required. Unfortunately the conductors will almost certainly not be long enough to reach the new switchboard. So can I have the contractor cut a pull box into the floor under (or immediately adjacent to) where the switchboard presently sits, and then pipe from there underslab over to the new switchboard? Is this a bad solution? What would you do?
Thanks!