Only after confirming its conductor size, cable type, installation method, condition, length, protective device, voltage drop, current-carrying capacity and test results are suitable for the new installation. Never assume an existing EV cable is suitable simply because the previous charger worked.

Confirm the charger location, supply arrangement, earthing, main protective device, available capacity, distribution board condition, cable route, existing RCD/SPD protection and communications requirements. Check the approved survey/design against actual site conditions before starting work.

Confirm the supply rating and assess existing maximum demand and significant loads such as heat pumps, electric heating, immersion heaters and other EV chargers. Where required, use approved dynamic load management to prevent the installation exceeding the available supply.

A fuse upgrade may be required where the existing supply cannot support the proposed additional load. This must be assessed against maximum demand and the proposed load-management arrangement. Any alteration to the DSO supply equipment must follow the appropriate ESB Networks process.

There is no universal cable size. It must be designed for the installation considering design current, installation method, ambient temperature, grouping, length, voltage drop and protective device. 6 mm² is common on many domestic 32 A installations, but it must be verified by calculation for the specific job.

Do not interfere with sealed DSO equipment. Determine whether the work can be completed safely without accessing the DSO side. If isolation of the incoming supply is required, follow the approved company/ESB Networks procedure.

A sealed main fuse must not be removed or interfered with unless you are specifically authorised to do so. If the installation cannot be completed safely without accessing sealed equipment, stop and escalate.

Check the manufacturer's instructions and the charger's built-in DC leakage protection. Do not assume all EV chargers have the same RCD requirements.

Use the protective device specified by the approved design and charger manufacturer while ensuring compliance with current wiring rules. Confirm rating, breaking capacity, RCD type and DC leakage requirements before installation.

Cable size must be calculated for the specific installation. A 22 kW charger normally draws approximately 32 A per phase, but cable selection depends on installation method, distance, grouping, temperature, voltage drop and protective device.

SPD requirements should be assessed in accordance with the current electrical installation rules and the installation design. Check whether suitable protection already exists before adding additional equipment.

Stop the installation and investigate. Do not energise an EV charger where the protective earthing arrangement cannot be verified. Escalate the issue where necessary.

For whole-property dynamic load management, the grid CT normally needs to measure the total import/export of the premises at the appropriate incoming supply position. Follow the manufacturer's diagram and ensure other loads or generation cannot bypass the measurement point.

Follow the manufacturer's CT orientation instructions. Incorrect orientation can cause import to appear as export and can prevent load management from operating correctly. In general the arrow should flow into the house as a rule of thumb.

The grid CT should normally measure the net flow between the property and the grid. A separate generation CT may be required where the system needs to measure PV production independently. Follow the charger manufacturer's configuration. In general the CT to measure what the panels are generating goes in the flow from the inverter to the MCB.

Use a hard-wired CT where a practical cable route exists and the manufacturer supports it. A compatible wireless CT transmitter may be used where direct wiring is impractical. Correct positioning and reliable communications remain essential.

Install the CT in the correct location, configure the site's supply/current limit and verify that the charger reduces its demand as the property's other loads increase. Never leave site without testing that load management responds correctly.