24.5 As an alternative to the spacing requirements of Table 24.1 or Table 24.2, as appropriate, the
spacing requirements in the Standard for Insulation Coordination Including Clearances and Creepage
Distances For Electrical Equipment, UL 840, may be used. The spacing requirements of UL 840 shall not
be used for output wiring terminals and spacings to a dead metal enclosure.
UL 840
Table 8.1
Minimum clearances for equipmenta
1.5 mm
Table 9.2
Minimum acceptable creepage distances on printed wiring boards
320V 1.6 mm