Main switchboard

Main switchboard in Australian records

Main switchboard identifies the principal switchboard context in an Australian electrical record. Use the term around consumer mains, maximum demand, load schedules and supply notes where the board role affects how the surrounding data is read.

The term should stay tied to the actual project board name. A site may have several switchboards, but only one board may be the main switchboard for the record being reviewed. That difference matters when load groups, supply paths and voltage-drop notes are copied between worksheets.

Where the main-board boundary matters

Main switchboard wording appears in maximum-demand worksheets, switchboard load schedules, consumer mains context and supply path explanations. It gives the calculation or table a board anchor rather than leaving the board role implied.

Main switchboard vs downstream boards

Main switchboard should not be used as a generic label for every distribution board. It is more specific than switchboard and usually carries the principal supply context for the record.

This glossary entry does not design the board, size consumer mains or approve protective devices. Those checks need project documents, current requirements and the relevant calculator or table.

Using MSB context in tools

Use the load schedule fields table to structure board records. Use maximum demand only when the entered load groups and assumptions are ready. Keep the main switchboard label beside the supply or load value it controls.