Industrial Control Panels UK – Forms 3a and 3b

Form 3a Separation of busbars from the functional units, and separation of all functional units from one another. Separation of the terminals, for external conductors, from the functional units, but not from each other. Terminals for external conductors not separated from busbars
Form 3b Separation of busbars from the functional units, and separation of all functional units from one another. Separation of the terminals, for external conductors, from the functional units, but not from each other. Terminals for external conductors separated from busbars.

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form-3b

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Note: These forms of separation are not relevant to arc fault containment which is not the subject of this specification, and would be subject to agreement between the manufacturer, and the client.

This information is correct at the time of this publication. Sandford Electrical Services Ltd cannot be held responsible for any changes that occur. It is the responsibility of the user to check with the relevant standard at the time of use.