16 Routine tests
16.1 The following routine tests are intended to ensure that the enclosure withstands the
pressure and also that it contains no holes or cracks connecting to the exterior.
The routine tests include an overpressure test made according to one of the methods
described for the type tests in 15.1.3. For apparatus intended for use at an ambient
temperature below –20 °C, a pressure test at normal ambient temperature is sufficient.
16.1.1 The routine overpressure test may be made by the first method even when the
overpressure type test has been made by the second method.
When the determination of the reference pressure has been impracticable and when a dynamic
test involves a risk to the enclosed apparatus (windings, etc.), the static pressures to be
applied are as follows: