Identification of Disconnection Means

DOE-HDBK-1092-2004

2.10 IDENTIFICATION OF DISCONNECTION MEANS

Switches in service panels, subpanels, or elsewhere shall be marked to show what loads or

equipment are supplied.

2.10.1 DISCONNECTING MEANS

In according to NEC 110.22, all disconnecting means (disconnect switches or circuit breakers)

shall be located for easy access and shall be clearly and permanently marked to show the

purposes of the disconnects, unless located and arranged so that the purpose is evident.

Labeling should match and be traceable to appropriate drawings. This applies to all existing

electrical systems and all new, modernized, expanded, or altered electrical systems.

Disconnecting means shall be capable of being locked out where required.

2.10.2 PANELBOARD CIRCUIT DIRECTORIES

Panelboard circuit directories shall be provided and fully and clearly filled out.

2.10.3 ENCLOSURE LABELING

Printed labeling or embossed identification plates affixed to enclosures shall comply with the

requirements that disconnects be legibly marked and that the marking shall be of sufficient

durability for the environment involved.

2.10.4 LOAD LABELING

As with the disconnecting device, the load should be labeled. For example, the motor, the

controller, and the disconnecting device could have the same identification number.

2.10.5 SOURCE LABELING

The source supplying power to the disconnecting means and load should be labeled as well.

This requirement allows the electrical worker to know the identification of the elements from the

source of power through the entire circuit. (See Figure 2-5.)

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