It’s unlikely that Lucy Electric will be alone in launching a non-SF6 ring main unit for the UK market, especially as we move closer to the January 1, 2026 date. Lucy Electric has unveiled EcoTec, the first ring main unit (RMU) of its kind in the UK, designed for medium voltage networks without the use of SF6.
Lucy Electric has unveiled EcoTec, the first ring main unit (RMU) of its kind in the UK, designed for medium voltage networks without the use of Sulphur hexafluoride (SF6). Tailored specifically for the UK market, EcoTec has been launched in response to new EU F-Gas regulations, which are set to be enforced from January 1, 2026.
One basic assumption in the Ring Final Circuit is the loads are suitable distributed so both legs of the ring are carrying broadly similar currents, really the assumption is 2.5mm can carry at least 20A so as long as you have no worse than a 1.5:1 split in current then a 32A breaker is fine to protect that.
The ring will supply the obvious kitchen appliances including 3kW oven, fan, washing machine, dishwasher, f/f, microwave, toaster, kettle, plus an elec fire at the far end. Potentially an iron. It's unlikely that all those will be on and at full load at the same time, but technically possible. Boiler and hob will be on separate supplies.
And the 2.5mm cable, which radially carries 27A or 6.2kW, and could carry 12.4 kW in a ring. But again, surely most kitchens have appliances of more than this without meltdown I've presumably got my thinking fundamentally wrong here. In which case, apologies for dumb question.
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Lucy Electric has unveiled EcoTec, the first ring main unit (RMU) of its kind in the UK, designed for medium voltage networks without the use of Sulphur hexafluoride (SF6). …
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One basic assumption in the Ring Final Circuit is the loads are suitable distributed so both legs of the ring are carrying broadly similar currents, really the assumption …