28 Installing the Radio TM9300/TM9400 Installation Guide© Tait Limited December 2015Inspect the vehicle and determine the safest and most convenient positionfor mounting the radio. Make sure that there is sufficient clearance behindthe radio for the heatsink and cables.IP54 ProtectionClassConsiderationsThe radio fulfils the requirements of the IP54 protection class.Notice Do not mount the radio in areas where it can be temporarilysubmerged from an accumulation of water or other liquids (e.g. whenusing a high-pressure cleaning device).The IP54 protection class does not apply when:■ the control head is removed from the radio body■ the bungs are removed from the auxiliary connector or the cavity for theexternal options connector (fitting an auxiliary connector or externaloptions connector will not restore the IP54 protection class)■ the grommet of the microphone or hand-held control head is notinstalled■ an accessory is added which is not rated to IP54 (e.g. control-headinterface box or hand-held control head remote interface box)4.5 Mounting the U-CradleThe U-cradle can be used to install the radio on the dashboard or on anysufficiently flat surface (e.g. cabin floor or trunk). The U-cradle can bemounted using the self-drilling screws and washers provided in theinstallation kit, or nuts and bolts (not included).Caution Although an industrial-strength recloseable fastening sys-tem can be used to support the installation, for safety reasons Tait doesnot recommend this as a mounting option.Notice When mounting the radio on a surface, check whether themounting screws will screw into material providing sufficient strength.Reinforce the mounting surface, if required.1. If the U-cradle is being mounted over a curved surface, bend the tabsat the bottom of the U-cradle slightly to match the surface shape.2. Hold the U-cradle in the position chosen for the radio and use themounting holes as a template to mark the mounting locations.Use at least four screws to install the U-cradle.