INSTALLATION

Liteworx Magnetic Transformer Installation Notes

(1) Install in ventilated area away from heat sources;

(2) Liteworx magnetic transformers can be installed in wet locations provided they are mounted on vertical surfaces with the built-in junction boxes down. Use suitable wet-location electrical connectors and conduit.

(3) Magnetic transformers distributed by Liteworx have dual primary and dual secondary windings. The primary can be connected for 110 or 220 volts and the secondary can be connected for 12 or 24 volts. Either primary voltage can deliver either secondary voltage. These transformers are not available with 277 volt primaries.

(4) Liteworx transformers deliver alternating current and do not experience voltage drop to the same extent that direct current devices do. Regardless of load size, properly-sized transformers can be positioned up to fifty feet away from the feed point of the lighting fixture without experiencing perceptible voltage drop. For runs further away than fifty feet but not more than one hundred feet, use conductors one size larger than is dictated by the size of the load.

(5) Transformer manufacturers often print wiring diagrams on their nameplates which are lacking in clarity. Wiring instructions in plain English (for dual-voltage transformers only) appear below:

Wiring for Dual-Voltage Transformers

There are eight wires in the wiring compartment of the transformer, numbered H1 through H4 and X1 through X4. To connect the transformer primary for 110 volts and have the transformer secondary deliver 24 volts, connect as follows:

1. Connect H1 and H3 to the hot leg of the 110 volt power supply;
2. Connect H2 and H4 to the neutral of the 110 volt power supply;
3. Connect X2 to X3;
4. Connect X1 and X4 to the 24 volt lighting.

To connect the transformer primary to 110 volts and have the transformer secondary deliver 12 volts, connect as follows:

1. Connect H1 and H3 to the hot leg of the 110 volt power supply;
2. Connect H2 and H4 to the neutral of the 110 volt power supply;
3. Connect X1 and X3 to one conductor supplying the 12 volt lighting;
4. Connect X2 and X4 to the other conductor supplying the 12 volt lighting.

To connect the transformer primary to 220 volts connect as follows:

1. Connect H1 to one hot leg of the 220 volt power supply;
2. Connect H2 to H3;
3. Connect H4 to the other hot leg of the 220 volt power supply;
4. Connect X1 thru X4 as indicated above for 12 or 24 volts.

Wiring Dual-Voltage Transformers for Voltage Bucking

Dual-voltage transformers of the type distributed by Liteworx are also knows as buck-boost transformers because they can be connected to lower or raise input voltage by 5, 10, or 20 percent. By lowering input voltage, a line-voltage fixture can run on less than the rated operating voltage resulting in an increased lamp life. A low voltage fixture operated with a magnetic transformer can experience the same benefit by powering the primary of the low voltage transformer from the output of a buck-boost transformer.

This practice also results in lowered light output. When light output can be sacrificed in favor of extended lamp life, the use of buck-boost transformers is ideal because it increases lamp life.

The following is a formula for calculating lamp life at reduced operating voltages and some examples of lamp life increase:

Derated Lamp Life = (Rated Voltage 4 Applied Voltage)¹² X Rated Lamp Life

• Derating 5% yields 185% life increase (110v to 104.5v or 24v to 22.8v)
• Derating 22% yields 1967% life increase (110v to 85.8v or 24v to 18.7v)

Connection for 5% derate:

1. Connect H2 to H3;
2. Connect H4 to 1 leg of power supply and 1 leg of fixture;
3. Connect H1, H4, and X2 to the other leg of fixture;
4. Connect X3 and X1 to other leg of power supply.

Connection for 22% derate:

1. Connect H1 and H3 to one leg each of power supply and fixture;
2. Connect H2, H4, and X1 to the other leg of fixture;
3. Connect X2 to X3;
4. Connect X4 to the other leg of power supply.

Liteworx Electronic Transformer Installation Notes

Electronic transformers of the type distributed by Liteworx come with their own junction boxes (except 75va transformers which require an installer-furnished junction box). They have built-in, self-resetting overload protectors so external fusing is unnecessary. They can be dimmed using standard incandescent dimmers.

Do not use electronic transformers to power more than a single home run. Each individual low voltage circuit should be powered by its own electronic transformer.

Unlike Liteworx magnetic transformers, electronic transformers are only available in single voltages. Most common and in stock are 110 volt primary/24 volt secondary versions.