The Electrical Inspector shall have the right, during reasonable hours and upon consent of the occupant, to enter any building or premises in the discharge of official duties to make any inspection, re-inspection or test of electrical equipment that is reasonably necessary to protect the public health, safety and welfare. Where the building or premises is unoccupied, the consent of the owner shall be obtained. If the Electrical Inspector has reasonable cause to believe that electrical installations or equipment within the building or premises constitute an extreme hazard to persons or property, the Electrical Inspector shall have the right to immediately enter and inspect such installations or equipment, and may use any reasonable means required to effect such entry and make such inspection, whether such property is occupied or unoccupied and whether or not permission to inspect has been obtained.