The plastic sleeve is built into the wall during construction: the light pushes into the tube, where it is held firmly in place by an o-ring, leaving a front plate with no visible fixing screws. Suitable drainage should be provided below each fitting to prevent water logging. Waymarkers should not be installed in ground subject to water logging, an IP68 light such as a Neptune Recessed light should be considered.
Using a single RCD for large numbers of 240v fittings is not recommended due to the risk of nuisance tripping. We advise the use of separate RCD protection for each circuit and a maximum of 12 fittings per RCD. Where a garden lighting installation of more than 12 spike mount or recessed lights per circuit is proposed, we suggest the installation of 12v units with transformers, which results in a significantly higher fault tolerance and reliability in the total installation