188.8.131.52.3 Controllers and Wiring
(a) The interiors of controllers and their components shall be cleaned when necessary to minimize the accumulation of foreign matter that can interfere with the operation of the equipment.
(b) Temporary wiring and insulators or blocks in the armatures or poles of magnetically operated switches, contactors, or relays on equipment in service are prohibited.
(c) When jumpers are used during maintenance, repairs, or testing, all jumpers shall be removed and the equipment tested prior to returning it to service. Jumpers shall not be stored in machine rooms, control rooms, hoistways, machinery spaces, control spaces, escalator/moving walk wellways, or pits (see also 184.108.40.206.1).
NOTE [220.127.116.11.3(c)]: See Elevator Industry Field Employees' Safety Handbook for recommended minimum jumper control procedures.
(d) Control and operating circuits and devices shall be maintained in compliance with applicable Code requirements (see 18.104.22.168.2).
(e) Substitution of any wire or current-carrying device for the correct fuse or circuit breaker in an elevator circuit shall not be permitted.