I bought a used Tripp-Lite IS500HG 500W hospital-grade isolation transformer.
I would like to convert it for electronics testing to float the hot and neutral when probing the 120V mains side of circuits with my scope...
Currently, the secondary outlet grounds, the secondary neutral, the chassis, and the input ground are all bonded together.
Specifically:
The secondary/output side looks as follows:
Secondary BLACK wire --> hot side of output outlets
Secondary WHITE wire --> neutral side of output outlets
Secondary GREEN wire --> output outlet ground, output outlet neutral, input plug ground, chassis
To convert this I know I need to unbond the secondary neutral from the common (and input) ground but I am puzzled by what this secondary GREEN wire is doing. It does not seem to be connected to any of the transformer windings or the core though it does emerge from the secondary side of the large transformer.
So which of these mods is correct:
1. Secondary GREEN wire --> output outlet ground, input plug ground, chassis (all bonded)
Unbond secondary neutral from the above common ground
2. Secondary GREEN wire floating
Output outlet ground, input plug ground chassis = bonded
Unbond secondary neutral from the above common ground
3. Other?