Why does my dishwasher need to be connected to a separate group

A dishwasher consumes more energy than the average kitchen appliance and should therefore always be connected to a separate group. On this page, we explain why.

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Why you need to connect your dishwasher to a separate group

The installation standards of NEN (Nederlands Normalisatie Instituut) were created for high-power electrical appliances. Devices such as an electric stove, microwave, oven or faucet with boiling water must all be connected to a separate group according to these general provisions. The maximum capacity of these devices is over 2000 watts and for this a separate group is required according to this rule.

 The power of a stove sometimes even exceeds 4000 watts, which even requires a double group. An exception is made for appliances that are used for less than 10 minutes at a time, such as kettles, coffee makers and blenders.

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Type of dishwasher

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Noise level dishwasher

A quiet dishwasher makes little noise when washing wet dishes. Is your dishwasher located near your living room? Then consider a quiet dishwasher.
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Dishwasher price

Of course, how much maximum you want to pay for your dishwasher is entirely up to your budget. A more expensive dishwasher will almost always have a longer lifespan than a cheaper one.
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Dishwasher size

A large family requires a larger dishwasher, and also a higher number of place settings. A smaller family will suffice with a dishwasher with a smaller number of place settings.
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Energy consumption dishwasher

An energy-saving dishwasher has energy label A, B or C and uses less water and energy. When you invest in an energy-efficient dishwasher, you almost always recoup this investment.
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Can a dishwasher and an electric hob be connected to one group

Large appliances with high power really should both have a separate group. The power of the appliances is too high to share a group. So if you connect a dishwasher together with the oven to the same group, it is against the installation standards. What happens then is that the group gets overloaded and the resulting damage will not be compensated by the insurance company. They have included in their conditions that damage is only compensated if the electrical installation meets the requirements established by the NEN. A dishwasher can be connected to a group with other devices, provided they have a low power.

If you have a new kitchen installed with more appliances, it may be that you do not have enough groups. You may then be short of capacity and one group.

Replacing your distribution board

For a new dishwasher, you may need to replace the distribution board or expand it with additional groups. It is better to leave this electrical installation to an electrician, because replacing your distribution board yourself without any knowledge of the meter box is virtually impossible.

Having your own group made by an electrician also gives you the guarantee that the electrical installation meets the set standards. Fortunately, most new homes already have their own group for the dishwasher, so you don’t have to go to any extra trouble.

Does an energy-efficient dishwasher also need its own group

Yes. Even though the consumption is a lot lower, the power of an energy-efficient dishwasher is still well above the standard of 2000 watts. If you don’t want to go to the trouble of creating one extra group in the meter cupboard, you can’t circumvent the standards by purchasing an energy-efficient dishwasher.