Should the street light use an isolation transformer?

The street lighting system uses 120 V, and there isn’t any ground wire. For safety, should I use an isolation transformer?

Installing the equipment grounding conductor is one of the best choices to ensure safety, and that is what many cities apply. Besides, you can use GFCI along with an isolation transformer. GFCI can detect current leakage and automatically disconnect the power supply, thereby preventing current from passing through the human body and avoiding electric shock injuries.

More reading: Design Guidelines for LED Street Lighting in Smart Cities

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