Guía técnica que cubre la selección de voltaje (12V vs 120V), dimensionamiento de conductos, requisitos de puesta a tierra y montaje resistente a la intemperie para accesorios exteriores comerciales.
Voltage Selection: 12V vs 120V Systems
12V low-voltage systems require transformers and are limited to 100-150 feet from power source due to voltage drop. Suitable for small residential landscapes. 120V/240V systems support runs up to 500 feet with proper wire gauge and are standard for commercial properties. Bojing recommends 120V for installations exceeding 20 fixtures or 200 feet of conduit run.
Wire Gauge and Conduit Sizing
For 120V circuits with 50+ fixtures, use minimum 10 AWG copper wire in 1-inch PVC or metal conduit. Voltage drop must not exceed 3% at the furthest fixture. Use this formula: Wire gauge = (2 × distance × amperage) / (voltage drop × conductivity). Bojing provides pre-calculated conduit sizing charts for standard fixture configurations.
Grounding and Bonding Requirements
All outdoor fixtures must be grounded to a central ground rod (minimum 8 feet deep, 5/8-inch diameter copper). Bond all metal conduit, mounting hardware, and fixture housings to ground with 6 AWG copper wire. Test ground resistance: must be below 25 ohms per NEC Article 250. Bojing fixtures include bonding lugs on all metal components.
Weatherproof Mounting and Sealing
Use stainless steel or hot-dipped galvanized hardware rated for outdoor use. Seal all conduit entries with silicone caulk rated for UV exposure. Fixture housings must have IP65 minimum rating (dust-tight, water-jet resistant). Bojing's mounting brackets include integrated drip loops to prevent water ingress at conduit connections.ons.
Inspection and Testing
After installation, perform continuity testing on all circuits, insulation resistance testing (minimum 1 megohm), and ground resistance testing. Verify fixture operation at 10%, 50%, and 100% brightness. Document all test results for warranty and compliance purposes. Bojing recommends annual re-testing for commercial installations.