All switching devices that have been used to disconnect the electrical installation for the work activity shall be secured against re-connection, preferably by locking the operating mechanism.
In the absence of locking facilities, equivalent prohibitive actions, in accordance with established practice, shall be taken in order to secure against re-connection.
If an auxiliary power source is required for operation of the switching device, this power source shall be made inoperative.
Notices, e.g. warning sign(s), shall be attached to forbid interference.
Where remote control devices are used to secure against re-connection local operation of the devices shall be prevented. All signalling and interlocking systems used for this purpose shall be reliable.
To secure against re-connection, the following actions shall be taken:
- A sign, “Do not operate. Work in progress “, shall always be applied
- Switching devices shall be locked when possible
- Control lever, fuse, connection piece, etc, shall be removed. These shall be kept inaccessible to unauthorised persons during the work activity.