WireTheSun⚡ Cable sizes- 7
- Circuits
- 10 ways
- Fuse box
- 40 A
- 6 mm²
- 47 m
- Cable to buy
Van and boat living-area wiring
Add the lights, sockets and appliances you want, room by room. We group them into circuits, size every fuse and cable, and draw it.
Battery voltage
What do you want?
Ceiling lights
How many
6
Ceiling lights
How many
2
Reading lights
How many
2
USB charging point
How many
3
Water pump
How many
1
Fridge (12 V compressor)
How many
1
Diesel heater
How many
1
Add on 12/24 V:Add on 230 V (through the inverter):
Circuits7
Fuse box10-way fuse box
Fuse box feed40 A · 6 mm²
Daily use (about)0.9 kWh
How it connects
Circuits
- 1💡 Ceiling lights · Living area × 61.5 A · 4 m · Dimmer1.5 mm²Fuse 5 A
- 2💡 Ceiling lights · Bathroom × 20.5 A · 3 m · Switch1.5 mm²Fuse 5 A
- 3📖 Reading lights · Bed × 20.5 A · 4 m · Switch1.5 mm²Fuse 5 A
- 4📱 USB charging point · Living area × 37.5 A · 3 m2.5 mm²Fuse 10 A
- 5🚰 Water pump · Kitchen7 A · 2 m1.5 mm²Fuse 10 A
- 6🧊 Fridge (12 V compressor) · Kitchen10 A · 2 m2.5 mm²Fuse 15 A
- 7🔥 Diesel heater · Garage / storage10 A · 2 m2.5 mm²Fuse 15 A
What to buy
- 1 10-way blade fuse box with negative bus
- 3 5 A blade fuse
- 2 10 A blade fuse
- 2 15 A blade fuse
- 1 Feed from the battery busbar: 40 A fuse and 6 mm² cable, red and black
- 2 12 V light switch (rocker or push)
- 1 12 V LED dimmer (PWM)
- 30 m 1.5 mm² flexible cable (red and black, tinned is best)
- 17 m 2.5 mm² flexible cable (red and black, tinned is best)
- Use dimmers made for 12 V LED (PWM). Put each dimmer between the fuse and the lights of its zone.
- Fridges and heaters need a steady voltage: give each its own fuse and a cable from the fuse box, never shared.
- Red for positive, black for negative. Label every fuse with its circuit number.
Guidance only. 230 V work must be done or checked by a qualified electrician; follow your local rules for vehicles and boats.