01
Equipment that needs a new circuit
New circuits can support a new room, fixed equipment or a detached space. The intended use matters: occasional lighting in a shed is different from a workshop with machinery. Include any future equipment you genuinely expect to add, so the electrician can assess the whole requirement rather than just the first socket.
02
Electrical demand and available capacity
Capacity depends on the existing supply and installation as well as the proposed load. A spare space in the consumer unit does not by itself prove that the new circuit can be added. The electrician should assess the arrangement and explain any associated work before equipment or cable routes are finalised.
03
Plan the new circuit's cable route
Distance, building construction and outdoor surfaces affect installation. Routes may involve floors, walls, external areas or groundworks. Discuss which surfaces may be disturbed and who is responsible for access and reinstatement. A site plan is often useful for a garage or garden room located away from the house.
04
What additional circuit installation includes
The quote should identify the circuit, distribution changes, protective measures, final connections and testing. Fixed appliances and EV chargers also have equipment-specific requirements, so their details need to be part of the design. Clarify whether excavation, structural work or finishing is included or arranged separately.
05
Request a new circuit installation
Describe the space, intended equipment, approximate distance and any planned building works. Include manufacturer specifications when available. This gives a better starting point than asking for an unspecified heavy-duty supply, which can mean different things to different people.
Electrical service questions
Questions about additional circuits
Can a garage supply support future equipment?
Future equipment can be considered, but its likely demand needs to be described. Extra capacity should follow a design decision rather than an assumption that one supply will suit everything.
Does a new circuit require a new consumer unit?
Not always. The existing installation and intended load need assessment. Ask the electrician to explain whether distribution changes or other associated work are required.
Who arranges trenching or building work?
Agree that explicitly. Some quotes cover electrical work only, while groundworks and reinstatement are arranged with another contractor. The cable route and responsibilities should be clear before work begins.
