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We’ve always focused on maintaining voltage limits to deliver safe, reliable power and allow for acceptable operation of electrical equipment. But as technology evolves and more renewable energy and distributed resources connect to the network, the previous voltage limits are now no longer suitable. 

Under updated regulations, new voltage limits have been introduced in February 2025 to support a modern, flexible electricity system. 

What this means for you:

  • Longer appliance life: appliances operate at optimal voltage, reducing wear and tear and reducing replacement costs 
  • Less energy waste: lower voltage limits reduce energy waste and support WA’s clean energy goals. 
  • Better integration of distributed energy: rooftop solar, batteries, and other distributed energy resources connect more effectively into the network. 

This isn’t just a regulation change - it’s a win for customers, industry, and the environment. 

February 2025 voltage settings comparison table 

  Single-phase connection  Three-phase connection 
  Nominal voltage  Max. allowable voltage  Min. allowable voltage  Nominal voltage Max. allowable voltage  Min. allowable voltage 
Previous voltage settings 240V  254V  226V  415V  440V 395V 
Updated voltage settings 240V  254V  207V  415V  440V  360V