TECHNICAL TASK
Electricity and low-voltage systems for the prefabricated module (Prefab Cabin)
Project Goal
To develop a modular electrical system for a prefabricated house that can be assembled at the factory and quickly connected on-site using a plug-and-play principle.
The system must be optimized for mass production and quick installation.
1. General Concept
The electrical system should be divided into modules (zones).
Examples of zones:
1. Kitchen
2. Bathroom
3. Bedroom
4. Terrace
5. Sauna
6. Hot tub
7. Technical area
Each zone must have a separate cable harness that connects to the main electrical panel.
2. Main Electrical Panel
Provide for the placement of a central electrical panel, from which all systems are powered.
The panel must contain separate lines for:
lighting
outlets
kitchen equipment
sauna
hot tub / jacuzzi
fireplace
ventilation (HRV / ERV)
audio system
outdoor lighting.
3. Voltage Strategy
The system should be divided into:
Low-voltage network
24V
for:
LED lighting
decorative lighting
facade lighting
control.
Standard network
120V (American standard)
for:
outlets
kitchen appliances
coffee machine
sauna
pumps
household appliances.
4. Prefabrication Logic
The electrical system should be designed for installation on the construction site.
Requirements:
pre-assembled cable harnesses
labeling of all wires
quick-disconnect connectors
minimum work on-site
Goal: complete electrical connection of the house on-site in a matter of hours.
5. Quick-disconnect Connectors
It is necessary to provide for the use of standard connectors.
Examples:
WAGO
Molex
waterproof connectors
quick disconnect terminals
The system should be as simple as possible for installation.
6. Lighting System
Provide for connections for:
Indoor Lighting
Outdoor Lighting
It is preferable to use low-voltage LED systems also at 24V.
7. Control
Provide for control for:
lighting zones
terrace
sauna
hot tub
fireplace
Control should be:
8. Audio System
Provide for cables for:
speakers
amplifier
subwoofer.
The amplifier should be placed in a hidden technical cabinet or furniture module.
9. Power Supply for Technical Equipment
Provide for power supply for:
air exchanger (HRV / ERV)
electric sauna stove (Finnish 3-4kW) or infrared will be decided.
hot tub
pellet stove with automation
10. Documentation
The engineer must prepare:
electrical plan
cable harness diagram
specification of connectors
electrical panel diagram
installation instructions for prefabrication preferably in English.
11. Main Goal of the System
The electricity must be:
modular
convenient and quick to install
safe
suitable for mass production
This project will be used for mass production of prefabricated houses.
12. The project should be executed in a Revit model where all devices will already be placed in their locations.
