89. 89.116. Maintenance. All electrical equipment, wiring and systems and installations shall be maintained in a safe operating and code-complying condition. The owner or the ownerís designated agent, or both, shall be legally responsible for the maintenance of all electrical wiring systems and installations.
Nothing contained in this code shall be construed to require any existing electrical equipment, wiring or systems regulated by this code to be altered, reconstructed, removed or demolished, providing such existing electrical equipment, wiring or system was installed and maintained in accordance with the adopted code in effect at the time of installation or subsequent alteration.
Unused conductors and cables shall be either removed or suitably identified and terminated in an approved manner.