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Old 14th Jul 2019, 5:26 pm   #7
M0FYA Andy
Nonode
 
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,510
Default Re: Isolation/isolating transformers

Whist accepting that an isolation transformer could reduce safety because you think you are safer, that is a matter of 'human factors' not physics. From the physics viewpoint, surely safety is improved because the mains input to your equipment is now no longer referenced to earth, so you have to contact two places rather than one and earth, which you may already be in contact with.

Also remember that a Variac is normally an autotransformer and doesn't provide isolation.

Andy
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