Historical
NEMA ICS 1.3-1986 (R2020)
Preventive Maintenance of Industrial Control and Systems Equipment
Covers fundamental principles, safety precautions and common guidelines for preventive maintenance of most industrial control and systems equipment. Intended to supplement more specific maintenance instructions that may be provided for particular product lines, specific products and other NEMA Standards and manufacturer publications.
NEMA: National Electrical Manufacturers Association [nema]