ᐅ Wallbox Preparation in Garage, New Construction

BBaumeister schrieb:

Then you need a five-core cable with a cross-section of at least 2.5mm (0.1 inches). 32 A is best, as that allows charging at 22 kW.

However, 2.5mm (0.1 inches) only supports 16 A, so 4mm (0.16 inches) or preferably 6mm (0.24 inches) cable is recommended.

It’s best to plan an empty conduit in the utility room leading outside, and run 1-2 cables directly from the distribution board to the outside (ideally also a LAN cable at the same time), and you’re done.
Cables are not expensive; for example, 10m (5G 6.0 mm²) costs between 30–60 EUR.

In our case, the cables were laid directly under the screed, so depending on your construction method, it might also be advantageous to install the cables in advance. So just an empty conduit is fine, but having all cables pre-laid is better 😉

And don't forget the Ethernet cable. At least Teslas require Wi-Fi, but it also applies to other cars.

k-man2021 schrieb:

And don’t forget the Ethernet cable. At least Teslas need Wi-Fi, but other cars do as well.

Why use an Ethernet cable if they need Wi-Fi anyway? 😳 The cable is probably meant for the charging station rather than the car itself. 😉

BBaumeister schrieb:

Then you need a five-core cable with a cross-section of at least 2.5mm² (0.0039 sq in).

Please don’t follow that advice blindly. Inform the electrician, because the cross-section depends on both the circuit protection and the cable length. For example, we have 16mm² (0.025 sq in) going to a distribution box in the garage. From there, 10mm² (0.016 sq in) goes to the charging station. (In that case, a smaller size would also have been sufficient.)

For me, the car needs Wi-Fi, not the charging station, but you are right, more advanced charging stations probably require a LAN connection as well. My Wi-Fi signal does not reach the garage, so I would always run a LAN cable into the garage. A 230V (230V) power outlet for an access point or router is usually available anyway, and Power over Ethernet (PoE) is also an option.

netuser schrieb:

However, 2.5mm (0.1 inch) cables only support 16A, so 4mm (0.16 inch) or preferably 6mm (0.24 inch) cables are recommended.

It’s best to install an empty conduit in the utility room leading outside, and pull 1-2 cables from the distribution board directly outside (ideally including a LAN cable) and that’s it.
Cables don’t cost much, for example, 10m (5G 6.0mm²) for 30-60 EUR.

In our case, the cables are installed directly under the screed, so depending on your construction method, it might also be advantageous to lay them in advance. So "empty conduit only" is good, but preparing and laying all cables ahead is better 😉

I mostly agree, but it really depends on the length and the connected load; only with those data can a proper answer be given.

An empty conduit alone doesn’t make sense; put the cables in right away, preferably also in a protective conduit, which doesn’t cost much. If it fits and you want it, you can also lay a 70mm (2.75 inch) sewer pipe conduit to the garage in addition to the cables currently needed, who knows if it might become a special-purpose room one day 😀

Definitely include a LAN cable; otherwise, how would the wallbox be priority-controlled or similar?

Unfortunately, I can’t imagine that 10m of 5x 6mm² cable is still available for 30-60 EUR, as copper prices are through the roof.

i_b_n_a_n schrieb:

However, I can't really imagine that right now you can still get 10m (33 feet) of 5x 6mm² cable for 30-60€ (copper prices are through the roof)

With 60 EUR, you can still just about make it (material cost only)