Should a community decorative tree’s lights be fed via RCD at 230V?

Question: Can you advise whether it is acceptable to have a community decorative tree's lights fed via an RCD at 230V?

Answer: Additional protection via a suitably rated RCD will be required.

However, if the public can make contact with the lamps, it would be beneficial if the voltage could be reduced to a safe level. If not, some sort of barrier would be a good idea.