Definitions cont'd - hdbk10920299

DOE-HDBK-1092-98

Failsafe--Build-in safety characteristics of a unit or system so that a failure (of the unit or system)

or a loss of control power will not result in an unsafe condition.

Failsafe--Built-in safety characteristics of a unit or system so that unit or system failure or a loss of

control power will not result in an unsafe condition.

General access area--An area that does not present hazards to personnel while equipment and

systems are functioning normally. These areas are accessible to all personnel.

energy sources in hazardous electrical equipment. It consists of a bare copper rod shaped like a

Leakage current--Refers to all currents, including capacitively coupled currents, that may be

conveyed between exposed surfaces of the equipment and ground or other exposed surfaces of the

equipment.

Limited access areas--Areas that are kept locked and are accessible only to authorized personnel

because of the hazards they contain.

Modulation--Change in normal characteristics of the recurring pattern in an electromagnetic field

as a result of a secondary electrical signal having been combined with the electrical signal from which

the field originates.

Personnel safety interlock system--One or more of the emergency-shutdown systems or personnel

access control systems or both.

Power density--Emitted power per unit cross-sectional area normal to the direction of propagation

of an electromagnetic wave from which results an electromagnetic field.

Rack cabinet--Any enclosure intended to house electrical equipment mounted to cabinet rails

mounted within the cabinet. Most rack cabinets house chassis 19" wide. They are available in several

heights.

Radio frequency--Non ionizing radiation generated in the portion of the frequency spectrum for

electromagnetic energy between audio and ultraviolet.

Safety barrier--A safeguard installed to restrict personnel access to a hazardous area.

Safety coordinator--An individual who has the responsibility of the safety of the work that is to be

performed and who is familiar with the hazards involved.

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