No. Symbol Approved Standards Description
15 IEC60417 Alternating current
No.5032 To indicate on the rating plate that the
equipment is suitable for alternating
current only; to identify relevant
terminals.
16 IEC60417 Direct current
No.5031 To indicate on the rating plate that the
equipment is suitable for direct current
only; to identify relevant terminals.
17 IEC60417 Class II equipment
No.5172 To identify equipment meeting the safety
requirements specified for Class II
equipment according to IEC 61140.
18 ISO 3864 General prohibition
To identify actions or operations that are
prohibited.
19 ISO 3864 Contact prohibition
To indicate injury that could occur due to
touching a specific part of the equipment.
20 — Never look into the optical lens while the
projector is on.
21 — To indicate that the marked item don’t
place anything on projector.
22 ISO3864 Caution, laser radiation
IEC60825-1 To indicate the equipment has a laser
radiation part.
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