ST750 GENERAL HANDBOOK
667/HB/33750/000 Page 63 Issue 6
carriageway. Where no pedestrian guard rails are fitted, a clearance of at
least 600mm should be left between the cabinet and the kerb edge so that
guard rails may be installed at a later date without the need to disturb the
cabinet installation.
(iii) Any person having control over the junction, whether manual control or test
box simulation, MUST have a good view of the intersection.
(iv) When the ST750 controller cabinet is to be located on unmade ground (e.g. a
grass verge) it is recommended that paving slabs or a concrete standing be
provided at ground level on the manual panel (left) side and the front side.
The hard standing shall extend a minimum distance of 900mm away from the
door, extending the full width of the controller cabinet, and at least 800mm
away from the side of the cabinet with a flap, again extending the full width of
that side. Customers may specify particular requirements.
5.4 Installation of the ST750 Small Cabinet
The following list details the order in which it is recommended that an ST750
installation take place in the ST750 small case, generally known as the ST400S
case.
It should be noted that the ST750S case is not designed to have the
controller stool removed. If the two parts are separated the stool will
flex and once concreted in the ground it may NOT be possible to refit
the controller cabinet to the stool or it may result in the case
becoming distorted.
The following list details the order in which it is recommended that an ST750
installation take place.
- the controller cabinet cannot be made waterproof
- Remove the Rack assembly if necessary – section 5.2
- Install the stool and controller cabinet into the ground – section 5.4.1
- Pull the cables into position – section 5.6
- Terminate the armour to the CET connectors – section 5.6
- Fit the CET glands to the CET bars – section 5.6
- Test the cables – section 5.7
- In-fill with kiln dried sand the controller stool/cabinet base and seal the cabinet
base – section 5.9 and 5.10
- Refit the Rack Assembly if applicable – section 5.2
- Terminate the cables – Section 5.6
Occasionally it may be necessary to terminate the cable prior to sealing the base. In
the case of the ST750 this will result in the necessity of installing the Rack Assembly
into the controller cabinet. It is usually better to seal the base and make provision for
the installation of additional cables such as Telecom or fibre cable by installing a
suitable size flexible duct. This duct itself may then be sealed with expanding foam
sealant.
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