Effika · Menorca
Engineering guides for Menorca and Spain
Clear explanations of installations, compliance, energy and business-opening procedures, written for owners and businesses in Spain and Menorca.
Electrical documentation
Electrical Installation Certificate in Spain: what it is and when you need oneA practical guide to Spain's Electrical Installation Certificate (CIE), who signs it and when a property owner may need one in Menorca.What documents does an electrical installation need in Spain?A clear map of Spain's electrical project or MTD, CIE, technical direction, OCA inspection and Balearic registration documents.
Design documents
Electrical project or Memoria Técnica de Diseño in Spain?How Spain distinguishes a full electrical project from a Memoria Técnica de Diseño (MTD), who signs each document and when they are required.When is a full electrical project required in Spain?REBT thresholds for industrial premises, public-access locations, car parks, generation, EV charging and other low-voltage installations.What is a Spanish Memoria Técnica de Diseño?What the Spanish electrical MTD contains, who may sign it and how it relates to the CIE and Balearic registration.
Electrical compliance
Existing installations
What to do when a Spanish property has no electrical documentsWhat to do when a Menorca property has no CIE, project or registration papers, and how the existing installation is assessed.How should an old electrical installation be renovated in Spain?Assessment, safety priorities, Spanish project or MTD documents and registration for an older property installation.
OCA inspections
What is an OCA electrical inspection in Spain?Which Spanish low-voltage installations need an initial or periodic OCA inspection and how this differs from the installer's verification.Which installations need periodic electrical inspection in Spain?Which Spanish low-voltage installations need an OCA every five years and when common services in apartment buildings are inspected every ten years.
Testing and verification
How is insulation resistance tested under the Spanish REBT?Test voltage, minimum insulation values and the procedure between conductors and to earth under ITC-BT-19.How is earth electrode resistance measured in Spain?How earth resistance is measured, the RA × Ia ≤ U rule and why Spain's REBT does not prescribe one universal ohm value.How is protective conductor continuity tested?How protective-conductor continuity is tested under Spain's REBT and how it differs from earth-electrode and fault-loop testing.
Electrical calculations
Voltage drop calculatorIndicative single- and three-phase formulae, Spanish REBT limits and the checks needed for a real cable design.Cable size calculatorEstimate cross-section from voltage drop and see why current capacity, short circuit and installation method may require a different size.Electrical current calculatorConvert kW to amperes using voltage and power factor, with the assumptions behind single- and three-phase formulae.Installed power and maximum admissible power explainedUnderstand installed, design, maximum admissible and contracted power in a Spanish electrical installation.
Protection and faults
What protection belongs in a Spanish electrical panel?Understand circuit breakers, RCDs and surge protection in a Spanish distribution board and common coordination faults.Why does the RCD keep tripping?Insulation leakage, moisture, mixed neutrals and cumulative leakage in Spanish installations, with a safe diagnostic path.
EV charging
Energy performance
When is an Energy Performance Certificate required in Spain?Spanish EPC requirements for sale, rental, new buildings and other RD 390/2021 cases, including Balearic registration.What is needed for a Spanish Energy Performance Certificate?What to prepare, what the assessor records and what is registered for an Energy Performance Certificate in Menorca.How much does an EPC cost in Menorca?Understand EPC costs in Menorca: survey, assessment, VAT and registration, what affects the quote and which property details to provide.How can a Spanish EPC rating be improved?Envelope, heating, cooling and renewable measures, assessed with a recognised procedure such as CE3X.