Because the original poster said he wanted to use a GCFI. It's not needed with a double wound transformer.
Do building sites use isolating transformers for power tools? In Europe they have to use a 55-0-55V transformer for portable tools by law. I always got my isolating transformers from a builders supply depot. On 01-Feb-11 23:45, kc9...@aol.com wrote:
Why is it recommended to use the GCFI? 73, Lee
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