Power Supplies / Low Voltage Transformers /

24V Transformers

Although 24-volt lighting systems aren’t as common as 12-volt lighting systems, they certainly have their own advantages. 24-volt transformers are UL rated for twice as much wattage on a single circuit than a 12-volt lighting transformer, which means you can run more 24-volt lights on one power supply.
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Power Supplies / Low Voltage Transformers /

24V Transformers

Although 24-volt lighting systems aren’t as common as 12-volt lighting systems, they certainly have their own advantages. 24-volt transformers are UL rated for twice as much wattage on a single circuit than a 12-volt lighting transformer, which means you can run more 24-volt lights on one power supply.
Helpful Lighting Tips and Information Below 
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Advantages of a 24-Volt Lighting Transformer

The higher maximum load allowed by a 24V power supply not only increases the capabilities of your lighting system by letting you double the total wattage, but reduces the risk of voltage drop when you are powering a long run of lights.

Just like a 12-volt system, a 24-volt lighting system should not exceed 25 Amps on any single run. But where the 12V system maxes out at 300 watts per run (25 amps x 12 volts = 300 watts), the 24V system can power up to 600 watts (25 amps x 24 volts = 600 watts).

Does that mean a 24-volt transformer can power 4 times as many 12-volt lights?

No. 24-volt transformers should only be used with lights that are rated for 24V. If a 24VAC power supply is used with lights that are rated for only 12 volts, the lamps will burn out immediately. Always check with the manufacturer of your light fixture to confirm the required voltage.

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