ᐅ Temporary construction power supplied from an existing residential electrical connection

I hope this is the right subforum.

We will start building our house in May. Currently, we live in the old building on the same plot and are constructing a new house about 2m (7 feet) away. After completion and moving in, the old house will be converted into a utility basement and garage. At least the existing house connection room will remain in use for electricity, telephone, and cable.

What is the easiest way to arrange construction power? I assume we don’t need an expensive tariff with a separate meter since we already have our own. Is it enough if the electrician installs a temporary power distribution box directly behind the meter? Or would a suitable protected three-phase socket and a small mobile construction power distributor also work?

A crane will also be needed by the construction company…

Good morning,

Apart from the fact that you should clarify this question with the shell builder/crane operator/electrician, your construction project most likely also requires a high-voltage power supply (400 V, 5 x 32 A). Can you supply this from the existing house? If not, you will have to use a standard construction site power distribution box with the required capacity.

Regards, Bauexperte

Hello,
a 32A connection is needed. Two years ago, 40A breakers were installed in the main electrical panel for the tankless water heater.
Would it be possible to simply install a 32A three-phase socket using the existing setup and connect a construction power distribution box there?
If this is possible, does the utility company need to take any action or be notified?

Hello,
an electrician should be able to install a 32 A CEE connection in or on your existing electrical panel. This is usually sufficient for building a single-family house. The limiting factor is usually the main service fuse. It is often housed in a separate plastic box and is typically sealed. Do NOT OPEN! The main service fuse must be rated higher than 32 A. It’s best to discuss this with your electrician. In our case, a 32 A CEE socket was already available. Our builder brought a temporary power distribution box with a meter and a 32 A CEE plug, and I just plugged it in. Everything worked without problems. Make sure to read the meter before starting construction work and settle the account with the builder afterwards.

We renovated our old building and temporarily used the existing main electrical connection and fuse box until the new fuse box was completed and the meter could be relocated.