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(A) Type
Transformers shall be enclosed, identified for the use, and listed.
(B) Voltage
The secondary circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. The voltage to ground of any output terminals of the secondary circuit shall not exceed 7500 volts under any load conditions.
(C) Rating
Transformers shall have a secondary short-circuit current rating of not more than 150 mA if the open-circuit voltage is over 7500 volts, and not more than 300 mA if the open-circuit voltage rating is 7500 volts or less.
(D) Secondary Connections
Secondary circuit outputs shall not be connected in parallel or in series.

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