BNC 577 - Manual (Page 45)

Model 577 Operating Manual 25
13 Safety Marking Symbols
This section provides a description of the safety marking symbols that appear on the instrument. These symbols
provide information about potentially danger-ous situations which can result in death, injury, or damage to the
instrument and other components.
Symbol Publication Description/Comment
IEC 417, No. 5032 Alternating current.
IEC 417, No. 5017
Earth (ground) terminal. Primarily used for functional
earth terminals which are generally associated with test
and measurement circuits. These terminals are not for
safety earthing purposes but provide an earth reference
point.
IEC 417, No. 5019
Protective Earthing conductor terminal. This symbol
is specifically reserved for the protective conductor
terminal and no other. It is placed at the equipment
earthing point and is mandatory for all grounded (Class
I) equipment.
IEC 417, No. 5020
Frame or chassis terminal. Used for points other than
protective conductor and functional earth terminals
where there is a connection to accessible conductive
terminals to advise the user of a chassis connection.
IEC 417, No. 5007
On (AC Mains) Located on the power switch at the rear
of the unit
IEC 417, No. 5008
Off (AC Mains) Located on the power switch at the rear
of the unit
IEC 417, No. 5172
Class II Equipment protected by double insulation or
reinforced insulation. The equipment typically does not
require a Safety Ground (Protective Ground).
ISO 3864, No. B.3.6 Caution, risk of electric shock
IEC 417, No. 5041 Caution, hot surface