Switches and circuit breakers

Marine Switches and Push Buttons: Which One to Choose?

Choosing the right switch for your boat depends on the application. A watertight switch is essential for areas exposed to water, such as the cockpit. Toggle switches are robust and reliable for basic functions (lights, pumps). For more delicate circuits (instrumentation, electronics), it's best to opt for thermal circuit breakers that protect against overloads and short circuits.

Pay attention to the number of terminals: a double-pole switch interrupts both poles (positive and negative), offering greater safety. Always check the maximum voltage supported (12V or 24V) and the amperage of the load you will be controlling. An undersized switch can overheat and fail.

Circuit Breakers: Essential Protection for Your Electrical System

A circuit breaker is a lifesaver for your boat's electrical system. It protects against overloads (excessive current draw) and short circuits (accidental contact between positive and negative). Unlike a fuse, a circuit breaker is resettable: simply return the lever to the ON position after it trips.

Choose the circuit breaker based on the rated current of the circuit you want to protect. For example, for a 5A lighting circuit, choose a 6A circuit breaker. For the water pressure pump, check the motor's inrush current and choose a circuit breaker with an appropriate tripping curve.

The Advice from Officina Basile

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FAQ - Frequently Asked Questions

How do I choose the right switch for my bilge pump?

Check the voltage (12V or 24V) and the maximum amperage drawn by the pump. Choose a watertight switch with a higher amperage rating (e.g., 5A pump, 10A switch). Also consider a three-position switch (ON-OFF-ON) for manual or automatic operation (via float switch).

What is the difference between an ON-OFF switch and a momentary switch?

An ON-OFF switch maintains its position (ON or OFF) until manually operated. A momentary switch automatically returns to the OFF position when released. It is useful for functions that require a short pulse (e.g., horn, engine start).

What does IP67 mean on watertight switches?

IP67 indicates the degree of protection against the ingress of dust (6) and water (7). An IP67 switch is fully protected from dust and withstands temporary immersion in water (up to 1 meter deep for 30 minutes). Ideal for areas exposed to splashes and humidity.