Can measurable.energy FCUs handle 3 kW appliances?

Yes and there are a number of benefits to choosing a measurable.energy FCU to measure and control your 3 kW appliances:

Compliance and Installation

It is fully permissible under UK wiring regulations (BS 7671) to supply appliances rated up to 3 kW from a 13A fused spur, provided the spur complies with the relevant British Standard.

Our measurable.energy fused connection unit (FCU) is a BS 1363-certified, 13A, double-pole device, exactly the class of fused spur specified for this application. This ensures complete electrical compliance, while introducing intelligence and safety features not available in standard FCUs.

Safety and Performance

Electricians sometimes opt for 20A switches with 3 kW loads because traditional 13A spurs can warm during prolonged operation near their limit. The measurable.energy FCU eliminates this concern through a built-in digital safety system that continuously monitors real-time current, temperature, and device health.

If unsafe conditions arise, sustained overcurrent, overheating, or a developing fault, the FCU automatically isolates the load. A 16A automatic cutoff ensures protection before reaching any unsafe threshold.

Extensive testing under 240 V, 13A load conditions (ambient 26 °C, 1.5 hours continuous) confirmed that the measurable.energy FCU remains within safe thermal limits, performing more reliably than a standard MK 13A fused spur (60 Deg C), while offering additional automated protection.

Energy Intelligence and Savings

Beyond compliance and safety, the measurable.energy FCU delivers real-time monitoring, analytics, and intelligent control of connected devices. 3 kW appliances are often left drawing standby power or cycling unnecessarily, creating hidden energy waste. By identifying and eliminating this automatically, the FCU delivers measurable, cost-effective energy and carbon savings without any impact on usability.

In summary

Compliant with BS1363 and BS7671 installation standards.
Approved method for supplying appliances up to 3 kW.
Enhanced safety through real-time monitoring, fuse-status alerts, and automatic isolation at 16A.
Proven reliability, validated through testing and installations.
Unique assurance, no other fused spur or switch combines compliance, protection, and measurable energy savings.

The measurable.energy FCU is already deployed nationwide in both traditional and modular buildings. It provides a fully compliant, safe, and intelligent solution for 3 kW appliances, giving installers, facilities teams, and building operators complete confidence in safety, reliability, and performance, while actively reducing energy use and carbon emissions.