Table 6.g.CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT
56
This standard provides for optional extension the Code additional letter B,
C, the actual protection persons against access hazardous parts higher than that
indicated the first characteristic numeral.1.6 Degrees protection against access hazardous parts indicated the additional
letter
Additional
letter
Degree protection
Brief description Definition
A Protected against access with the back
of the hand
The access probe, sphere mm
shall adequate clearance from
hazardous parts
B Protected against access with finger The jointed test finger ,
80 length, shall have adequate
clearance from hazardous parts
C Protected against access with tool The access probe 2,5 ,
100 length, shall have adequate
clearance from hazardous parts
D Protected against access with wire The access probe 1,0 ,
100 length, shall have adequate
clearance from hazardous parts
In the relevant product standard, supplementary letter following the second characteristic
numeral the additional letter may indicate supplementary information. the rotor rotating machine) are motion
S Tested for harmful effects due the ingress water when the movable parts
of the equipment (e. the rotor rotating machine) are stationary
W Suitable for use under specified weather conditions and provided with
additional protective features processes
.1.
Table 6.g.7 Supplementary letters
Letter Significance
H High-voltage apparatus
M Tested for harmful effects due the ingress water when the movable parts
of the equipment (e
