What markings are required on disconnecting means and circuits?

• Motors and appliances — Each disconnecting means must be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. sufficient durability to withstand the environment involved. The marking must be of sufficient durability to withstand the environment involved.
• Services, feeders, and branch circuits — Each service, feeder, and branch circuit, at its disconnecting means or overcurrent device, must be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. The marking must be of sufficient durability to withstand the environment involved.
• Marking for series combination ratings — Where circuit breakers or fuses are applied in compliance with the series combination ratings marked on the equipment by the manufacturer, the equipment enclosures shall be legibly marked in the field to indicate that the equipment has been applied with a series combination rating.
  
  The marking required must be readily visible and shall state “Caution—Series Combination System Rated — Amperes. Identified Replacement Component Required.”

All disconnecting means must be capable of being locked in the open position.