I am in the process of designing a product which will allow operators to make final adjustments to television sets. It is general practice to use an isolation transformer with an ungrounded neutral when performing these adjustments to protect against the high voltage potential to ground. Does anyone know if this practice is documented in any published standard (ANSI, OSHA, IEEE, TV manufacturers association, etc.)? I am also looking for a NEC code exception that allows an ungrounded circuit to be used in this application.
Any assistance is appreciated.
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