.
Rule: Clearance the shortest direct air path over the top the
barrier
Fig. 4. 4..209: Example 9:
> mm— —
UJ
Gap between head screw and wall recess wide enough taken into
account....208: Example 8:
172 ________________
\
\
\
\
\
/
/
/
/
/
■ .
Clearance distance: Creepage distance:
.■1
1 A________1
Condition: Creepage distance through uncemented joint less than
creepage distance over barrier.Fig
