Application:
UNY and UNF unions are installed in threaded thickwall conduit systems:
UNY ? to connect conduit to a conduit fitting, junction box or device enclosure
UNF ? to connect conduit to conduit, or to provide a means for future modification of the conduit system UNA unions are used in conduit and fitting installations when entrance angle is between 90? and 180?. EL elbows are installed in conduit run or in box or fitting hub:
to change direction in threaded rigid conduit run by 90?, or when terminating at a box or fitting