Respected EV Charger Installers in Neutral Bay

No. Using a standard household extension lead to charge an electric vehicle is not safe and should never be done, even temporarily. An EV charger on a Mode 2 cable draws current continuously at or near its rated load for multiple hours. Extension leads are designed for intermittent use with appliances that cycle on and off. The sustained current of EV charging exceeds what the lead's plug, socket, and cable are designed to handle for extended periods.

The primary risk is heat. A domestic extension lead carrying 10A continuously for six to eight hours generates heat at every connection point: the plug, the socket, and any section where the cable is coiled or compressed. A coiled lead is particularly hazardous because heat that would otherwise dissipate into surrounding air is trapped in the coil. This can degrade the insulation, overheat the cable, and in serious cases cause a fire.

Extension leads also lack residual current protection specifically calibrated for EV charging. A proper EV charger circuit has a dedicated RCBO rated at 30mA providing both overcurrent and earth leakage protection. A standard power board relies on whatever protection exists upstream in the switchboard, which may not respond correctly to leakage currents from an EV charging system.

The only correct solution is a properly wired dedicated EV charger circuit with appropriate protection. If a permanent charger is not immediately practical, a vehicle's Mode 2 cable can be used in a properly protected 15A socket outlet, but never through an extension lead of any kind.

An RCBO on an EV charger circuit can trip for several different reasons, and understanding which type of trip occurred is the first step to knowing what to do next.

Overcurrent trips occur when the current drawn exceeds the rated capacity of the circuit. An EV charger on a correctly specified 32A circuit should not trip from overcurrent under normal operation. If it does, the cause is usually a fault within the charger unit, a problem with the vehicle's onboard charger, or a wiring issue.

Residual current trips occur when the RCBO detects current flowing to earth that shouldn't be there. This can happen because of a fault in the charger's electronics, a fault in the vehicle's charging system, moisture or water entering the Type 2 connector, a damaged cable where conductors are no longer fully insulated, or an RCBO that has aged past its reliable service life.

After the RCBO trips, try resetting once. If it trips immediately on reset without the car connected, the fault is in the circuit or RCBO itself. If it holds without the car but trips when the car is connected, the fault is in the vehicle or cable. If it holds on reset and does not trip again, it may have been a momentary condition. If it trips repeatedly, stop using the circuit and have it inspected before charging again.

When grid power is lost, an EV charger stops delivering current immediately. The vehicle's battery management system registers the interruption and the charging session ends. No damage occurs to either the vehicle or the charger from a normal grid interruption, because both the charger's electronics and the vehicle's charging system handle loss of supply cleanly.

When supply is restored, the charger's behaviour depends on the model and its configuration. Some chargers auto-resume the session without any input from the owner. Others require the cable to be disconnected from the vehicle and reconnected to initiate a new session. Smart chargers with scheduled charging configured may resume according to the schedule or wait for the next scheduled window, depending on the manufacturer's design.

For Neutral Bay properties in apartment buildings where the entire building supply can be affected by a network fault or a trip in the building's main switchboard, there may be a short delay between supply returning and individual apartment circuits being fully re-energised. The charger may appear non-responsive briefly before normal operation resumes.

If the charger does not resume after power is restored, a manual reset of the RCBO at the switchboard will restore the circuit to normal. If the RCBO does not reset or trips again immediately, that indicates a fault requiring investigation rather than repeated resets.

Multi-level properties where the garage sits below the main living area are common in Neutral Bay, particularly on the hillside streets above Military Road and around Kurraba Point. The switchboard in these properties is often on the upper or mid-level, and the cable run to the garage involves passing through a floor-ceiling assembly.

The primary consideration when running cable through a floor is maintaining the fire resistance of the structure. Where a cable penetrates a fire-rated floor assembly, the penetration must be fire-stopped after the cable is in place. This involves sealing the gap around the cable with an approved intumescent or fire-stop compound. In residential construction, the assembly between the garage and the living space above is typically required to be fire-rated, and an electrical penetration must not compromise that rating.

The cable itself routes from the switchboard down to the garage level in conduit, typically through the garage ceiling void, along the ceiling space, and down the wall to the charger position. Where concealed routing is limited by the floor construction, surface conduit inside the garage is the practical alternative and is visually acceptable in most garage environments.

The fire-stop requirement is the most important compliance point when penetrating between levels. We inspect the floor construction at the proposed penetration point during the site assessment and advise on the specific fire-stopping requirement for your property before any work begins.