Electrical and control panels require dedicated working clearance. Duct, hangers, and transitions cannot steal that space just because the run fits physically.
Do not install duct or hangers where they block required service or electrical working clearance.
Check
Identify the electrical or controls panel: disconnect, VFD, DDC panel, controls cabinet, or equipment electrical compartment.
Check the required working clearance with the electrical foreman, approved detail, project requirement, NEC/AHJ interpretation, or equipment submittal. Do not guess.
Measure the clear space between your duct/hanger and the panel face, including door swing and service access.
If the panel cannot open fully or a worker cannot safely stand in front of it, hold the duct layout before finalizing hangers.
Do not route duct through required electrical working space. This can stop inspection and force finished duct to be removed.
Steps
Identify the electrical or controls panel: disconnect, VFD, DDC panel, controls cabinet, or equipment electrical compartment.
Check the required working clearance with the electrical foreman, approved detail, project requirement, NEC/AHJ interpretation, or equipment submittal. Do not guess.
Measure the clear space between your duct/hanger and the panel face, including door swing and service access.
If the panel cannot open fully or a worker cannot safely stand in front of it, hold the duct layout before finalizing hangers.
Do not route duct through required electrical working space. This can stop inspection and force finished duct to be removed.
Say this to your foreman
My duct at [location] is close to the electrical/controls panel on [unit tag]. I have about [measurement] of clear space, and I need to confirm the required working clearance. Do you want me to reposition the duct before I finalize hangers?