Partial Power Loss

When some rooms or circuits go dead while others keep working, you're dealing with a partial power loss — and the cause can range from a single tripped circuit to a fault deep in your consumer mains. Sydney Power Group (SPG) diagnoses these faults 24/7 across Greater Sydney.

As a Level 2 ASP, we can trace the problem all the way from an individual circuit back through the switchboard and consumer mains to the supply, so we find the real cause rather than treating the symptom.

Why Only Half the House Loses Power

Partial power loss usually means one or more circuits have dropped out while the rest of the installation keeps running. A common cause is a single tripped circuit breaker feeding certain rooms, often triggered by an overloaded circuit or a faulty appliance on that run.

It can also point to a loose connection on a busbar, a failed breaker, or one leg of a multi-phase supply dropping out. If a whole side of the switchboard is dead, the fault may sit at the main switch or in the consumer mains — see no power to house if everything is off.

Circuit, Main Switch or Consumer Mains

We start by identifying which circuits are affected, then work backwards. If it's isolated to one circuit, we carry out electrical fault finding on that run. If a larger section is out, we check the main switch, RCDs and busbar connections.

Where the loss traces to a damaged or ageing consumer mains, our Level 2 accreditation lets us repair the supply cabling and coordinate with Ausgrid, Endeavour Energy or Essential Energy if the fault reaches the network side.

Restore Full Power — Call SPG

Living with half your power missing is more than an inconvenience. Call SPG on 0466 125 125 now for a proper diagnosis, or book emergency help and we'll get every circuit back on safely.

See related scenarios on the emergency electrician hub.