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Linnepe TriGasAlarm 303405 wiring diagram
TriGasAlarm 303405 from the 2019 instructions: 95–160 mA at 9–16 V, mounted about 10 cm above the floor. This revision is not intended for continuous operation and must be calibrated after switching on. It is not documented as a carbon-monoxide detector.
- Compatible systems
- 12 V
- Continuous draw
- 0.2 A
Wiring diagram
How the TriGasAlarm 303405 is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
No numeric fuse or extension gauge published: protect the actual cable, use extension at least the supplied lead cross-section, total cable length no more than 3 m. Example source fuse is a planning choice. This 2019 revision is not for continuous operation and must recalibrate after switching on. Manufacturer installation manual
Edit this wiring exampleCable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
3.3 ft one way
12 V system
- Wire
- 16 AWG · 1.5 mm²
- Example fuse
- 1 A
- Design current
- 0.2 A
- Voltage drop
- 0.0%
Sized against ABYC E-11. The design current is the part's continuous draw. The length is one way; voltage drop includes an equal-length return.
Run-length and manufacturer assumptions
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
No numeric fuse or extension gauge published: protect the actual cable, use extension at least the supplied lead cross-section, total cable length no more than 3 m. Example source fuse is a planning choice. This 2019 revision is not for continuous operation and must recalibrate after switching on. Manufacturer installation manual
Supporting parts
- 6.6 ft total of 16 AWG (1.5 mm²) marine cable
- Terminations for 16 AWG cable, matched to the equipment's screw terminals, leads or studs
- 1 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation (rev. TriGasAlarm 303405 instructions, 2019 edition, manufacturer PDF mirrored by Alarmprofi), checked 2026-10-01. Manufacturer documentation →
Which alarm and gas coverage are documented?
This entry is Linnepe TriGasAlarm 303405 from the 2019 instructions. The manual describes detection of LPG and certain gases within its stated scope; it does not establish certification as a carbon-monoxide detector. Do not use this entry as evidence that a separate CO alarm is unnecessary. The technical data, PDF page 2, specify 9–16 V and 95–160 mA; the catalog uses 0.16 A as the upper published draw.
Where is it mounted and wired?
Connect red to positive and black to negative. The English installation section, PDF page 8, locates the alarm approximately 10 cm above the floor and calls for cable extensions of the same or greater cross-section as the supplied lead, with total length no more than 3 m. Keep the sensor exposed to cabin air rather than burying it behind furniture. A second sensor, where fitted, follows its own high-level mounting instructions.
What supply protection is established?
The reviewed instructions do not give a numeric branch-fuse value or an independent terminal ampacity. Protect the cable at its source according to the actual wire and installation; do not interpret the 160 mA consumption as a fuse prescription. The detail-page supply example remains a planning example, and the supplied lead must not be replaced with a smaller extension.
Is this a continuously operating detector?
This revision explicitly says that it is not designed for continuous operation. Follow its switch-on-before-sleep and switch-off-after-use instruction. On startup, wait until calibration completes and the indicator reaches its ready state before relying on the alarm. Power interruptions restart that process, so an unannounced switched feed changes when detection is available.
How is it tested and maintained?
Follow the manufacturer's functional-test method in the English operating section, PDF pages 10–11, keeping flame away from the sensor and cabin gas systems. Confirm the audible and visual alarm and its recovery. Repeated unexplained alerts call for ventilation and investigation under the manual's response procedure, not silencing the unit permanently. Keep the sensor clean and unobstructed, and verify readiness after each power cycle.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
TriGasAlarm 303405 from the 2019 instructions: 95–160 mA at 9–16 V, mounted about 10 cm above the floor. This revision is not intended for continuous operation and must be calibrated after switching on. It is not documented as a carbon-monoxide detector.
- Compatible systems
- 12 V
- Continuous draw
- 0.2 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
Red +
positive · input
Black −
negative · input
A dash means a current rating is not specified here.
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. Results use the example current and run length shown above. Set your actual equipment, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with TriGasAlarm 303405.
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