Information: The difference between VA, VVA and Spare Capacity (NEN 1010)

• VA (Volt-Ampere): This is the maximum power that an electrical circuit can deliver (what the circuit can theoretically handle). For example: a 16A circuit has a maximum power of approximately 16A x 230V = 3680 Watts.
• VVA (Expected Volt-Ampere): This is the power you actually expect to use (the expected load). This is often lower than the maximum power, because not all connected appliances or lighting are fully on at the same time.

• Spare Capacity: This is the difference between VA and VVA. A spare capacity is necessary to prevent the circuit from becoming overloaded when multiple devices are used simultaneously. If the VVA is too close to the maximum VA, an extra device can cause the fuse to trip.
• NEN 1010 Standard: This standard prescribes how an installation must be designed. One of the requirements is that there must be sufficient spare capacity so the installation continues to operate safely. For very heavy appliances (such as an oven or washing machine), the NEN 1010 dictates that they must be connected to their own final circuit.