Distribution boards (often called DBs) are a crucial part of any electrical installation. Their primary function is to distribute electrical power from a main switchboard or supply source to various circuits within a building or site. Each outgoing circuit is protected by a circuit breaker or a protective device to ensure safe and reliable operation.
Distribution boards are commonly used in residential, commercial, and industrial settings. They help organise and manage electrical loads by separating lighting, power, mechanical and machinery onto individual circuits. This not only improves system efficiency but also enhances safety by isolating faults when they occur.
There are many types of distribution boards, including surface-mounted and flush-mounted options, single-phase and three-phase versions, and models built for indoor or outdoor environments. Key components may include MCBs (miniature circuit breakers), RCBOs (combined protection), and surge protection devices.
Modern distribution boards are designed with ease of installation and maintenance in mind, offering clear labelling, accessible layouts, and allowance for future expansion. Compliance with Australian Standards (such as AS/NZS 61439 series of standards) is critical to ensure
