JBL CONTROL 24C Owner's Manual page 13

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b) Tightening onto flexible or hard conduit- The supplied fitting accommodates up
to 3/8 inch (9.5mm) flexible conduit. Slide the wiring through the strain relief fitting
on the terminal cover plate. Insert the conduit into the strain relief fitting. Reinsert
the horizontal screw that was previously removed. Use the two horizontal screws that
clamp the fitting together, clamping the conduit securely between them.
Figure 15:
Tightening Fitting
Onto Conduit
Using an Alternate Fitting- The existing strain relief fitting accommodates many
common fitting requirements. Sometimes, alternate fittings are required, such as for
larger diameter conduit or to meet specific code requirements.
In these cases, the existing fitting can be easily replaced with a number of available
off-the-shelf fittings. Simply remove the existing fitting by unscrewing the two
hold-down screws, exposing a 7/8 inch (22mm) knockout hole. Install the alternate
fitting.
Caution:
Always use the proper fitting in accordance with your area's
building codes and regulations.
Close the Terminal Cover- Close the hinged terminal cover and secure it in place with the
hold-down screw.