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Tuesday, February 27, 2018
Question:
Is it required to seal the ends of spare conduits that leave a panelboard? When a panel is recessed in a wall the installer often stubs up a few ¾” EMT conduits that just come up above the lay in tile ceiling with a stub 90.
Best Regards, Jim Dorsey
A
Answer:
Hey Jim thanks for your question. Raceways must generally be installed complete between enclosures as stated in 300.18(A) and be mechanically continuous as stated in 300.12 - before installing conductors. Openings in enclosures must be closed as stated 110.12(A) and some could argue that the interior of the raceway is a hole in the panelboard. Capping or sealing the end of the raceway is easy to do and will help keep out debris and unintended inhabitants but there is not a specific rule to point to.