. 4.208: Example 8:
172 ________________
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■ .209: Example 9:
> mm— —
UJ
Gap between head screw and wall recess wide enough taken into
account.
Rule: Clearance the shortest direct air path over the top the
barrier
Fig..Fig. 4..
Clearance distance: Creepage distance:
...■1
1 A________1
Condition: Creepage distance through uncemented joint less than
creepage distance over barrier
