Proximity of the urban networks [2026-2]

The objective of the WG work is to assess the existing standards and to propose suggestions to IEC, considering that most national standards follow the same rules. The steps would be:

• Raise the history that led to the minimum distances that are used today within IEC and IEEE. Identify similarities between the IEC61936 guide for values of outdoor transformers clearances.
• Survey the practices adopted all over the World that can bring evidence to propose raising the minimum distances (questionnaire & consultation with experts of IEC, IEEE, etc…)
• Survey of the existence or not of systematic problems like accidents with an association to the minimum distances practiced.
• Make a proposal for IEC of new values of minimum distances from the aerial cables, distribution transformers and fuses, to building facades.
• Make an economic comparison between the resources necessary to change distances in new installations and the use of underground networks.

•To write a brochure including the conclusions of the work indicating the positive and negative impacts of increasing the minimum distances. If possible, prepare a draft of an improved standard.