This guide explains how power-off time, access and practical prep are agreed before the installation day. It helps flag essentials like home working, alarms, fridges, freezers and internet equipment before the board is changed.

What to plan before the day

  • Agree the likely power-off window before the installation date is set.
  • Make sure there is clear access around the consumer unit and the main switch area.
  • Mention anything that depends on power, such as internet equipment, alarms, fridges, freezers or home working.

What can change the timing

  • Hidden damage, poor previous work or access constraints can change the plan.
  • Testing or labelling issues can add time, especially on older or altered installations.
  • If timing changes, the reason should be explained before the work moves on.
Official sources and further guidance

Need to plan downtime before a board change?

Send board photos, your postcode and a note on anything that depends on power during the day, such as internet equipment, alarms, fridges or home working.