A combination of durable, well engineered products and fool-proof methods that work together for the highest possible system integrity.
The CAST system achieves the best possible system integity by providing tools, techniques, and support for the various stages of the project: planning, installation, testing, voltage adjustment, documentation, and maintenance.
Simple to use and accurate - forms and tools for successful planning.
- Customized worksheets and planning guides assist the designer in calculating and selecting system components.
- Accurate formulas predict voltage loss and aide the designer in the selection of wire gauge and transformer type.
- Photometrics and architectural detail drawings for each fixture and system component assist in bid preparation and presentations.
The CAST Spider Splice® Method of Installation - A proven technique by thousands of lighting professionals
The CAST Spider Splice® method is a vast improvement upon previous techniques that require more in-field splices that fail to deliver consistent voltage to all fixtures. The following illustration shows the concept behind the CAST method - a system composed of a number of home runs terminating in Spider Splice junctions with fixtures attached with equal length wires.
The Spider Splice® method in combination with CAST products ensures even distribution of voltage and corrosion-proof wire connections.
The installation phase of the system relies upon the following CAST product features:
- Solid bronze or copper fixtures prewired with tin-coated No-Ox® marine grade wire
- Spider Splice® junctions
- No-Ox® home run wire
- Transformers designed for quick and secure connections
Using these products, the designer lays out the installation with Spider Splice® junctions positioned near fixture locations. Each junction accommodates up to 6 fixture wires. Since each fixture is pre-wired with a 25 ft. wire, the distances from Spider Splices to fixtures are equal and the voltage losses will be identical. This ensures all fixtures on a single Spider Splice will receive the same voltage.
The only splices in the field are in the protected Spider Splice junctions.
Testing and Voltage Adjustment
Accurate voltage measurement is the number one priority.
After splices have been made, all home run wires are connected to the 12 volt tap of the transformer and the system is powered. The extra large terminal blocks in CAST transformers allow the connection of all home run wires.
The installer then tests the voltage using the testing wires in each Spider Splice® or at the fixture. From these measurements voltage drops are noted and home run wires are shifted to the correct voltage taps.