Once the transformer has been installed and you determined all the fixtures locations, the next step is to run the correct size cable from the transformer to the fixtures. FX Luminaire LED fixtures require between 10 and 15 volts for optimal operation and longevity. This is accomplished by the following:
- Following Circuit Guidelines
- Cable Stats
- Low-Voltage Cable
- Cabling Methods
- Connecting Cables at the Terminal Block
- Voltage Drop Calculator
For maximum light output and LED life, each luminaire should be provided with 10 to 15 AC (11-15 AC for ZDC Color fixtures).
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Low-voltage lighting systems are typically installed using direct-burial-rated stranded cable. The most common cable used is referred to as 12/2 AWG (2.05 mm) stranded cable. The size of cable used in wiring the lighting system will be determined by the wattage load and length of cable run from the transformer to the lighting fixtures.
It is very important to note that all low-voltage cable has a maximum rating. Overloading cable can create a dangerous safety hazard, so be sure to choose the proper cable size for your lighting system.
COMMON - Watts shown are per 12 AWG (2.05 mm), cable. Install additional cable runs as needed to complete project. To increase wattage maximum, run 8 AWG (3.26 mm) or double 12 AWG (2.05 mm), to the first fixture in the zone. Use a digital voltmeter to fine-tune circuits.
15-VOLT - Out There-Zone 120–160' (36.6 m - 54.9 m) LED 110 watts max.
Each low-voltage lighting cable consists of two parts. One part of the cable is designated to carry the voltage load and is referred to as the Common lead. The Common lead is installed into one of the two COM terminal blocks. The other wire lead is installed into one of the two lugs labeled 15V. Voltage is carried out from the transformer to the fixtures via the Common side of the cable and returns back to the transformer 15V tap via the other half of the cable, thus completing the circuit.
Within each cabling zone, you may utilize any of a number of cabling methods. The primary objective is to minimize voltage drop by installing the proper size feeder cable (home run) to each zone, and to make sure each fixture on each cable run is receiving 10 to 15 volts. Center feeding the “home run” (the main cable run from the transformer to the first fixture on the circuit) will help minimize the voltage differential between the first fixture and the last fixture on the cable run.
Transformer terminal block: The Luxor controller includes two Common lugs, and two 15V lugs.
Common Lugs: One conductor from each cable run coming from the lights to the transformer must be connected to one of the common lugs. The other conductor will be installed into the 15V hot lug.
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