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Old 15th Sep 2018, 11:57 am   #9
ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
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Default Re: Lamp limiter plus Variac tip

Quote:
Originally Posted by crackle View Post
The trouble with isolation transformers is they don't protect you if you get a shock from a live point to chassis in an AC/DC set.
Where's the live on the secondary of an isolating transformer? If you connect yourself between HT and chassis when the device is powered by via an isolating transformer you'll get a shock, likewise if its powered via an RCD only, an RCD is designed to trip if there's a sufficient difference in current flow between the live and neutral downstream of it such as that provided by a current path to earth.

Lawrence.
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