Main breaker switch for sale in Brisbane

What is the difference between a main switch and a circuit breaker?

A main switch (or isolator) is designed purely to switch power on and off manually—it does not provide overcurrent protection. A circuit breaker automatically trips during overload or fault conditions to protect circuits. Main switches are used for isolation during maintenance and servicing, allowing electricians to safely de-energise circuits.

What is a circuit breaker used for?

A circuit breaker automatically trips during overload or fault conditions to protect circuits. Main switches are used for isolation during maintenance and servicing, allowing electricians to safely de-energise circuits. Circuit breakers protect against electrical faults but aren't designed for frequent switching operations.

What is a main switch?

Main switches are electrical isolator devices that disconnect entire installations or circuits from power supply. Available in 80A-100A ratings with single-pole, double-pole, or three-pole configurations, they enable safe maintenance isolation, emergency disconnection, and comply with AS/NZS 3000:2018 Australian standards.

How much does a main switch cost?

Clause 2.3.3.7: The main switch shall be clearly and permanently identified. For installations where safety services are supplied, special provisions apply—consult the full standard and your licensed electrician. Main switches start at $8.95 + ex. GST depending on brand, amp rating, and pole configuration.