Documentation · guide for installers

Cabling design — routes, lengths and cable allowances

Assign cables to devices, organise routes and review lengths before preparing the estimate.

Prepared by EnergyHouse · Updated: 19 October 2026

A cabling plan should show where each connection starts and ends. Separate routes to the distribution board, network rack and alarm control panel. This makes the materials list easier to verify than a total assembled from arbitrary cable lengths.

Demonstration Loxone project with rooms and devices in EH Designer
Demonstration Loxone project with rooms and devices in EH Designer. Screenshot of the Polish interface. Demonstration project; appearance and prices may change with updates. Click to enlarge.

Workflow

Before calculating cables, verify the drawing scale and mounting heights. Include vertical runs, drops and allowances rather than using only the distance between symbols. When ordering, distinguish the metres needed for installation from full supplier packs. Review the estimate again after changing a route.

Selecting actual cable products

In Wiring, configure the cable’s use and select a specific catalogue product.

  1. Go to Floor plan → Wiring and open Cable configuration using the top toolbar icon.
  2. Choose a product for the required function. Check the manufacturer, price per metre and availability.
  3. You can change the cable assigned to an individual point in the device details.
  4. After a change, check the cable schedule and project estimate.

Also consider the operating environment, shielding and conductor type when selecting cables. A similar name does not prove compatibility.

Cable routes

The route type defines the device’s connection destination.

  1. Select an object and check Cable route in its details.
  2. Choose the correct destination, such as a distribution board, rack or alarm panel.
  3. In Wiring, select the installation type to view the relevant routes.
  4. Check the route after replacing or moving a device.

Cable lengths and allowances

The priced length includes the route and configured allowances.

  1. In Wiring, open Cable length settings using the configuration icon.
  2. For the relevant function, set the length multiplier and the allowances at the start and end, in metres.
  3. Check the route and floor scale.
  4. Compare the schedule length with the actual installation route.

Do not add allowances that the application has already included.

Metres and full packs

The cable purchase quantity may differ from the route length.

  1. Check the pack length and whether the selected cable can be bought by the metre.
  2. Purchase by the metre applies when the requirement is less than half a pack, if the product supports this purchase method.
  3. From half a pack upwards, quantities are rounded up to full packs.
  4. For example, with 100 m packs, a 688 m requirement means buying 700 m. A short length may be priced by the metre.

Try it in your own project

Open EH Designer on a computer with a mouse. Start with one room or part of the installation, review the result and expand your project. For available plans, see pricing.

Create an EH Designer account

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