(a) Every public utility shall furnish, provide, and maintain such adequate and efficient service, instrumentalities, equipment, and facilities as shall promote the safety, health, comfort, requirements, and convenience of its patrons, employees, and the public.
(b) Every person, firm, or corporation engaged in a public service business in this state shall establish and maintain adequate and suitable facilities, safety appliances, or other suitable devices and shall perform such service in respect thereto as shall be reasonable, safe, and sufficient for the security and convenience of the public and the safety and comfort of its employees, and, in all respects, just and fair, and without any unjust discrimination or preference.