The Restricted Electrical Worker’s licence (REL) – previously known as ‘D’ licence – entitles the licence holder to perform low-voltage electrical disconnect and reconnect electrical installation.
With work relating to:
- Equipment that is connected to a fixed electrical installation.
- Associated with a primary trade, vocation or occupation that would otherwise require the services of a Registered Electrical Contractor or a licensed electrician.
Candidates may be eligible to apply for an REL if they are employed (and not currently an apprentice or trainee) in an occupation where there is a need to disconnect and reconnect equipment connected to the fixed electrical installation or a component of that equipment.
Plumbers, mechanical fitters, refrigeration and air-conditioning mechanics are examples of trades able to apply for this type of licence.
The different classes of REL are:
- REL Class 2 (Disconnect/Reconnect)
- REL Class 1 (Disconnect/Reconnect and Fault Finding)
Both REL licence classes allow the disconnection and reconnection of ‘like for like’ equipment, for the purposes of repair, replacement or maintenance. Only the REL Class 1 licence allows the fault finding.
The REL does not allow a person to carry out electrical wiring and installation work at low voltage or above, including the installation of new wiring or equipment. All fixed electrical installation work requires a licensed electrician.


