What are the allowable situations for using flexible cords and cables?

Flexible cords and cables are allowed for use in specific situations such as temporary power connections for portable tools and equipment, in industrial settings where flexibility is necessary for mobility, and for connecting appliances to fixed wiring. They can also be used in situations where the cord is part of a manufactured assembly, like extension cords, provided they comply with safety standards. However, they should not be used as a substitute for permanent wiring or in locations where they may be damaged or pose a safety hazard.