Boletín eléctrico · CIE

Boletín eléctrico in Tenerife, explained

The boletín eléctrico, officially the Certificado de Instalación Eléctrica (CIE), certifies that an installation meets the low-voltage regulation (REBT). Without a valid one, the distributor will not connect or change certain supplies.

Ask us about your case

When it is usually asked for

A new electricity supply (alta nueva)
Reconnection after the supply has been off for a long time
Increasing contracted power above what the existing certificate allows
Significant changes, for example single-phase to three-phase
Older installations: a certificate around 20 years old may need renewing when the contract changes

Cases vary between distributor, retailer and property, so we check yours before any work starts.

What the process looks like

Inspection. The installation is checked against the REBT: consumer unit, earthing, circuits, protections.
Corrections. Anything that does not comply is listed and quoted, then fixed.
Testing. Insulation, earth resistance, RCD trip times, measured and recorded.
Certificate. The certificate is issued and registered, then used by the distributor or retailer.

What usually needs fixing first

Item	Common problem in older properties
Earthing	No earth electrode, or earth resistance too high
Consumer unit	Single RCD, no labels, undersized main switch
Circuits	Fewer circuits than ITC-BT-25 requires; cable too thin for the breaker
Bathrooms	Sockets or lights inside the protected zones around the bath or shower
Outdoor	Fittings not rated for outdoor use; corrosion from salt air

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