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How to Determine the Correct UL Output Transformer

Underwriter's Laboratory is a third-party organization that ensures consumer safety. Simply plugging a transformer into the wall isn't enough when you want to be sure. Anything that plugs into a wall outlet can pose a fire risk, which is why the iconic stamp of approval on consumer goods is peace of mind. Knowing that the transformer you are using is UL approved, it's important to stay within the output limits and select the correct transformer.

Things You'll Need

UL approved transformer
Device to be powered
Supporting documentation for transformer

Instructions

- 1
  Review your power needs. Specifically, you should know what output voltage and output current you need for whatever devices you are trying to power. This will play heavily into selecting the right transformer.
- 2
  Review any supporting documentation for a UL approved transformer. Review the output voltage and current. This information may be reported the output voltage and current ratings.
- 3
  Verify the information on the package for the transformer. It is common for transformers to have the output current and voltage printed or labeled on the case. Once you are sure that your power requirements will be met, then be sure the connectors to hook up the transformer to the device will mate. Once all these requirements are met, then you are ready to use the transformer to power the device.

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