Power supply identification practice will enhance the safety for the electrical personnel who service these disconnects

The Code: Section 110.22 (A)

Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so the purpose is evident. In other than one or two family dwellings, the marking shall include the identification of the circuit source that supplies the disconnecting means. The marking shall be of sufficient durability to withstand the environment involved.

Each disconnect has a label referencing the power source immediately before it

Other Notes

  • Excludes one or two family dwellings
  • Same identification is required for switchboards, switrchgear, and panelboards [408.4(B)]