Their meaning as
follows:
Letter Meaning
H High-voltage device
M Tested harm caused water which enters when the moving
parts the device are operation (e.
Such exceptions must comply with this basic safety standard.5 diameter,
100 long) must maintain a
sufficient distance hazardous parts
D Protectedfrom access
using wire
The access probe (10 diameter,
100 long) must maintain a
sufficient distance hazardous parts
Table 3.g. the rotor rotating
machine)
S Tested harm caused water which enters when the moving
parts the device are idle (e.
Additional
letter
Degree fprotection
Brief description Definition
A Protectedfrom access
using the back the hand
The access probe ball with a
diameter mm) must maintain a
sufficient distance hazardous parts
B Protected from access
using one finger
The jointed testfinger (12 in
diameter, long) must maintain a
sufficient distance hazardous parts
C Protectedfrom access
using tool
The access probe (2. the rotor rotating machine)
w Suitable use during specified weather conditions, when
equipped with additional protective measures procedures
. The product
standard must clearly specify the additional procedure carried out for
the classification.4: Additional letter, taken from 529:
The relevant product standard permits additional information.38
Table 3.
The letters listed below have already been defined.3: Additional letter: Degrees protection from access to
hazardous parts, taken from 529. can be
provided appending another letter the second identifier the
additional letter.g
