The contractor shall supply and install electrical isolation switches to enable the safe isolation of electrical supplies serving domestic dwellings and communal areas without the need to remove service fuses. As part of the works, the contractor shall provide a property pack for each installation. The property pack shall include, as a minimum: • Photographic evidence of the installation, including: • Condition prior to works • Installed isolation switch in situ • Labelling and accessibility • Electrical test results confirming correct installation, including completion of a polarity test • Confirmation that the isolation device has been installed in accordance with this specification and applicable regulations This specification applies to: • Domestic properties (individual dwellings, flats, maisonettes) • Communal properties and supplies, including but not limited to: • Landlord supplies • Communal lighting and power circuits • Plant rooms, risers, corridors, and stairwells • Meter cupboards and intake rooms The works are limited to: • Installation of electrical isolation devices only The works do not include: • Consumer unit or distribution board replacement • Alterations to service heads or other DNO-owned equipment • Reconfiguration of existing circuits beyond what is necessary to install the isolator safely