Any person, firm, association, or corporation operating or causing to be operated any oil burner, motor, sign, or other electrical apparatus within the city or connected with the light and power system operating in the city, which shall cause unnecessary electrical interference with radio or television reception shall equip such apparatus with proper filtering attachments to eliminate such interference. Provided, the provisions of this section shall not apply to the use of necessary medical or health equipment or apparatus where such interference cannot be reasonably eliminated.