IEC60730 Class B

IEC60730-1 applies to automatic electrical controls in association with equipment
for household and similar use. This includes controls for heating, air-conditioning
and similar applications using electricity, gas, oil, solid fuel, solar energy etc.
including combinations of it.
Controls shall be designed and constructed that in normal use they function so
as not to cause injury to persons or damage to surrounding property, even in the
event of such carelessness as may occur in normal use.
More specifically the standard applies to automatic electrical controls,
mechanically or electrically operated, responsive to or controlling such
characteristics as temperature, pressure, passage of time, humidity, light,
electrostatic effects, flow, or liquid level, current, voltage, acceleration, or a
combinations of these.