Conduit is required for all commercial and industrial wiring within the city limits. Conduit is also required for residential wiring within the “Fire Limits” of the city. The Fire Limits generally covers the downtown area and begins at the northwest corner of Main and Spring Streets (U.S. 20), runs northeasterly along the east side of Bench Street to Meeker Street, then from Meeker back toward the river to Water Street, then along Water Street back to the point of beginning.