To establish an equipotential zone around a URD transformer in the field, what is the best method?

Establishing an equipotential zone around a URD (Underground Residential Distribution) transformer is critical for ensuring safety and preventing electrical shock hazards. The best method to achieve this is to connect all cables to a common point.

Creating a common point configuration ensures that all conductive elements within the area are at the same electric potential, minimizing the risk of step and touch potentials that can occur due to voltage differences. This alignment greatly enhances safety for anyone working around or in close proximity to the transformer because it mitigates the risk of electric shock caused by errant voltage.

Other methods, such as connecting all cables to a power source or applying high voltage, can introduce risks and do not serve the purpose of establishing a safe equipotential zone. Using insulated tools is also important for safety during maintenance but does not directly contribute to the establishment of an equipotential zone.