3: Additional letter: Degrees protection from access to
hazardous parts, taken from 529. 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. the rotor rotating
machine)
S Tested harm caused water which enters when the moving
parts the device are idle (e.g.38
Table 3. The product
standard must clearly specify the additional procedure carried out for
the classification.
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. can be
provided appending another letter the second identifier the
additional letter.
The letters listed below have already been defined.
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)
w Suitable use during specified weather conditions, when
equipped with additional protective measures procedures
.4: Additional letter, taken from 529:
The relevant product standard permits additional information
