7.307—Static pressure test.
(a) Test procedure.
(1)
The enclosure shall be internally pressurized to a minimum of 150 psig and the pressure maintained for a minimum of 10 seconds.
(2)
Following the pressure hold, the pressure shall be removed and the pressurizing agent removed from the enclosure.
(iii)
Clearances, in excess of those specified in this subpart, along accessible flame-arresting paths, following any necessary retightening of fastenings.