When live work is considered
In Spain, Royal Decree 614/2001 establishes de-energised working as the rule for tasks involving electrical risk, subject to the exceptions in Article 4. Supply-continuity requirements must be assessed within that framework. Habitually working without shutdown does not replace an assessment of the actual task.
Before accepting live work, consider whether a shutdown can be scheduled, a service supplied through another safe arrangement or the required information obtained by dead testing. The decision must concern the particular installation and task, rather than granting general permission to work inside any switchboard.
Different operations have different requirements
Spanish regulations distinguish live work from switching, measurements, tests and verification, which have their own provisions. This distinction matters when assigning competence and procedures. Measurement can also expose someone to adjacent live parts; describing the activity as fault-finding does not remove that hazard.
Live work under the general regime requires qualified workers. The related Authorized and qualified workers for electrical work (Spain) entry explains the distinction. Qualifications or a training course do not replace the task-specific procedure or make every intervention acceptable. Particular regulatory provisions, including certain protected fuse replacements, require individual assessment rather than broad assumptions.
What must be settled beforehand
Planning must identify live parts, possible contact, short circuits and arc hazards alongside environmental conditions. Tools and protective equipment must be designed for the task and service voltage, checked for condition and used and inspected according to their instructions. Available equipment alone does not determine whether the work is justified.
Space, stable footing, lighting, third-party access and communication must also be addressed. The procedure is studied beforehand and rehearsed de-energised when its novelty or complexity requires this. Emergency arrangements and the ability to summon assistance must not be improvised during the intervention.
When to stop and reassess
A configuration change, drawings that do not match the board, damaged protection or adverse environmental conditions may invalidate the planned arrangement. Clear suspension and escalation criteria are needed. Personal protective equipment addresses particular risks but does not justify continuing when the assessment or conditions on which safe execution depended are no longer valid.
