How do I size a transformer for my lighting installation?

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Answer

Calculate the transformer required by determining the total wattage of all lighting fixtures. This is the minimum required output of the transformer. You typically want to choose a transformer that supplies no more than 30% more.

For example:

  • 10 LED wall lights @ 2 watts each = 20 watts
  • 10 LED deck lights @ 1 watt each = 10 watts
  • 5 LED path lights @ 3 watts = 15 watts
  • Total minimum output required by the transformer = 45 watts

In this example, a 60 watt magnetic or electronic transformer would be ideal.

How do I mount a low voltage transformer?

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Answer
Your power supply should be mounted at least 12 inches above ground level. Many transformers are not completely sealed and should have that clearance according to UL 1838.

Do I need to take voltage readings with electronic transformers?

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Answer
It’s not necessary. The electronic transformer automatically supplies 11.5 volts AC and adjusts for the amount of demand. The actual output will vary depending on the number of fixtures but will not exceed 11.5 volts.

When utilizing a magnetic transformer, it is advised to take voltage readings. As magnetic transformers do not regulate voltage, accurate readings are necessary to ensure your fixtures perform as warranted.

Can I mount my low voltage transformer inside?

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Answer
No. Generally speaking, low voltage transformers are listed and labeled for “Outdoor Use Only.” If your installation requires an indoor transformer, consult your local electrical codes… you may be able to purchase a low voltage power supply locally for that specific use. Remember that if you are using a photocell, you may have to make other provisions for controlling the outdoor lighting.

How many LEDs can the electronic transformer handle?

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Answer

Our IL200.515 electronic LED power supply is designed for use of 1-20 Integral Lighting LED fixtures associated with a cable run of less than 100′. If you have questions about your design and if this transformer will supply adequate voltage, please call 800-861-1364.

How close can an LED be mounted to the electronic transformer?

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Answer

Fixtures can be positioned within 1′ to 50′ of the receptacle. This unit automatically adjusts the load, therefore eliminating any worry of overpowering a fixture mounted too close to the power supply.

Do I need to use low voltage cable with the electronic transformer?

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Answer
Yes. Generally speaking, 12/2 gauge is fine. 14/2 gauge will be adequate since the load of the LED is much less than standard incandescent fixtures.

Can I mount your electronic transformer outside without a cover?

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Answer

The housing is weatherproof and the actual electronic transformer is encapsulated for protection.

Can I use your electronic transformer to power AC or DC lights?

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Answer

Our IL200.515 electronic LED power supply delivers 11.5 volts AC. It is specified for AC fixtures only and is compatible with all Integral Lighting 12vAC LED fixtures. If you purchased fixtures manufactured by companies other than Integral Lighting, please consult the manufacturer prior to installation.

Do fixtures dim with further distances (as with magnetic transformers)?

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Answer
Yes. Longer runs of cable still affect the transmission of voltage. If this is the case and you require a longer run or the lights are too dim, consider a magnetic transformer in lieu of the electronic transformer.