Correct Installation of Inground Luminaires
Problems with inground lighting installations are common, and are almost always due to poor system design and /or poor installation procedure.
Any type of flat cable is unsuitable for outdoor installations as it cannot professionally terminated into a glanded junction box as required. The use of any type of tape or heat-shrink is not acceptable and will not provide adequate long term integrity for wet areas Ensure the site and location has a clearly defined installation plan that included consideration of drainage and cable/conduit joints.
For inground luminaires, suitable drainage layers must be put in place beneath the luminaire to prevent saturation. Refer to Fig 1. Diagram below. All cable connections and joins must be completed within suitably appropriate 3-way junction box. Underground junction boxes should be internally encapsulated using epoxy resin. The only acceptable method for outdoor or underground cable connection is the use of a suitably rated enclosure Example is the Superlight SL3003 shown in Fig 2. (optional installation accessory is available separately by request)
Fig 2. SL3003 Junction Box
Inground Luminaire
Luminaire Housing
Concrete
Appropriately sealed Junction box
Gravel or Bluestone Layer
Sand Layer
Fig 1. General installation of Inground Luminaire
This guide is for generic information purposes only. Please refer to your suitably qualified electrical contractor before finalising any details regarding wiring and installation.
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