False.

Running MC cable (or any electrical wiring) inside ductwork used for exhaust (or HVAC in general) is generally prohibited by electrical and building codes. Here's why: Safety



Fire Hazard

If the cable insulation were to fail, it could ignite combustible materials that might accumulate in the ductwork (lint, dust, etc.).

Toxic Fumes

Burning cable insulation releases toxic fumes that could be circulated throughout the building via the HVAC system.

Code Violations

Electrical and building codes (like the NEC) have specific rules about wiring methods and locations. They typically prohibit running electrical wiring inside ductwork designed for air handling.

Accessibility

It would be very difficult to inspect, maintain, or repair the wiring if it were inside the ductwork.

Air Quality

Insulation of any type of cable in ductwork can negatively impact air quality

Proper Ways to Run Wiring for Lighting a couple floors up



Conduit

EMT (electrical metallic tubing) or PVC conduit provides physical protection for the wires and can be surface-mounted or concealed within walls/ceilings.

MC Cable (Properly Installed)

MC cable can be run through wall cavities, ceiling spaces, or other approved pathways, secured and supported per code requirements.

Other Approved Wiring Methods

Depending on the specific application and local codes, other wiring methods might be acceptable (e.g., NM cable in some residential applications, AC cable).

Cable Trays or Wireways: In some commercial or industrial settings, cable trays or wireways can be used to route multiple cables in an organized manner.Always consult with a qualified electrician and refer to your local electrical codes before starting any electrical work. They can ensure that the wiring is installed safely and in compliance with all applicable regulations. Flag for review