ZENITH-P
5.3 DRILLING CLEARANCES
Cable gland size
a - (mm)
12
16
20
25
32
40
50
63
75
Table 6
(*) Minimum distance from the enclosure edge or the limit drilling area.
Clearance between two holes with same diameter
a
a
a
GLAND
b
b
b
CLEARANCE
Minimum centre to centre distance = b
Figure 6
5.4 COMMANDS, CONTROLS AND SIGNALLING COMPONENTS
• All components (actuators, switch and signalling elements) have ATEX / IECEx separate certificates. Installation and
maintenance shall be done as prescribed by manufacturer documents.
• The ambient temperature range will be limited by the component (terminal, actuator, switch, etc.) with the worst characteristics.
• Only SCAME approved components can be mounted.
• Creepage and clearance distances shall comply with IEC / EN 60079-7 (see table 4), current and maximum dissipated power
shall not exceed the maximum value allowed.
• The equipment must be mounted vertically with the conductor terminal mounted to the rear of the enclosure and the actuator
components fitted to the cover of the enclosure.
5.5 DRAIN BREATHING VALVES
Drain/breathing valves approved by SCAME have ATEX / IECEx separate certificate. Installation and maintenance shall be done as
prescribed by manufacturer documents.
IP rating of drain/breathing valves fitted shall be suitable with the IP rating of the enclosure.
MP39690
Minimum Clearances
Between holes
b - (mm)
a
GLAND
b
CLEARANCE
25
32
39
46
58
68
81
96
105
Clearance between two holes with different diameters
a1
GLAND
b1
CLEARANCE
Minimum centre to centre distance = b1/2 + b2/2
20
Minimum Clearances
From the edge (*)
(mm)
6
8
9
11
13
14
15
16
16
a2
a2
GLAND
a1
b1
b2
b2
CLEARANCE
ZP91043-2