Background: A woodwork shop is being set up by
finishing a section of unfinished basement. Three
electrical circuits have been added. A circuit for
lights only, a circuit for the wall outlets, and
a 20 amp, 240V circuit which handles only a
switched 240V outlet for a closeted dust collector.
The "closet" vents back into the shop area through
louvres and the shop is "sealed" from other basement areas as well as is reasonably possible.
After all the wiring was done and walls largely
finished I've had the idea of adding a small outside
venting exhaust fan (120V) in the dust collector
closest which runs when the collector runs and thus
creates a slight negative air pressure differential
in the shop to help prevent dust dispersion.
Is the following a legitimate wiring solution?
Run a single insulated "common" wire and a ground wire from the overhead light to the exhaust fan (box-fill requirements remain O.K.). Run a single insulated wire from either of the "hot" wires in the 240V outlet box (box-fill remains O.K.) to the exhaust fan. This would yield a 120V source at the exhaust fan which runs only when the collector is running.
finishing a section of unfinished basement. Three
electrical circuits have been added. A circuit for
lights only, a circuit for the wall outlets, and
a 20 amp, 240V circuit which handles only a
switched 240V outlet for a closeted dust collector.
The "closet" vents back into the shop area through
louvres and the shop is "sealed" from other basement areas as well as is reasonably possible.
After all the wiring was done and walls largely
finished I've had the idea of adding a small outside
venting exhaust fan (120V) in the dust collector
closest which runs when the collector runs and thus
creates a slight negative air pressure differential
in the shop to help prevent dust dispersion.
Is the following a legitimate wiring solution?
Run a single insulated "common" wire and a ground wire from the overhead light to the exhaust fan (box-fill requirements remain O.K.). Run a single insulated wire from either of the "hot" wires in the 240V outlet box (box-fill remains O.K.) to the exhaust fan. This would yield a 120V source at the exhaust fan which runs only when the collector is running.
