bobby ocampo
Senior Member
250.20 (a) Alternating Currents Systems of Less Than 50 volts. Alternating-current of less than 50 volts shall be grounded under any of the following conditions:
(1) Where supplied by transformers, If the transformer supply exceeds 150 volts to ground.
Will the code allow the system grounding to be UNGROUNDED where the supplied by a transformer, if the transformer supply system will NOT exceed 150 volts to ground?
What does the Code means when it says, "If the supply voltage exceeds 150 volts to ground"?
Does it mean that if the supply voltage is 208/120 volts, and the transformer used is delta-delta with secondary voltage is less than 50 volts the secondary is allowed to be ungrounded?
(1) Where supplied by transformers, If the transformer supply exceeds 150 volts to ground.
Will the code allow the system grounding to be UNGROUNDED where the supplied by a transformer, if the transformer supply system will NOT exceed 150 volts to ground?
What does the Code means when it says, "If the supply voltage exceeds 150 volts to ground"?
Does it mean that if the supply voltage is 208/120 volts, and the transformer used is delta-delta with secondary voltage is less than 50 volts the secondary is allowed to be ungrounded?