IEC EN 61386 and PMA DO 9.21-4610 are designed to test the security of the connection between conduit and fitting.
Two fittings with a piece of conduit between them are pulled apart with steadily increasing force. Extension of the conduit is recorded graphically against the force applied. The force required to pull the conduit out of the fitting is determined
The tests are performed at 23°C and 50% r.h.