Roberto,
IPC-2221, Generic Standard on Printed Board Design,
Table 6-1, Electrical Conductor Spacing, says:
171-250VAC (301-500VAC) - 1.25mm
(2.5mm) - uncoated, sea level to 3050
m
-
6.4mm (12.5mm) - uncoated, over 3050 m
- 0.4mm (0.8mm) -
permanent polymer coating, any elevation
All
figures are for externally run traces.
Jerry
hi to all
i want to know the minimun distance between two
trace on a standard fr4 material
with a pollution level of 2 (from
vde0110).
the voltage is 230vac for the trace under the
mains and 380vac for the power section
in europe we look a table from CEI EN 60335-1
that say to use 1 mm every 100v for
level 2 of pollution and 1 mm every 150v for 2
level
is there similar for UL standard ?
we make coffee machine and i look on the UL197
standard (table 28.1) that say a minimun
distance of 4mm or 3.2mm for 126 to 250vac (in
the U.S. we sell only single phase machine).
thank's a lot
roberto radaelli
rancilio coffee machine