RCD tripping diagnostic
Distinguish danger signs, likely leakage, overload or a possible external outage without opening the panel.
Check the RCD Free tools centre
Electrical tools for better-informed decisions
Free, fast checkers and calculators with no registration. They help organise the problem before requesting a visit, but do not replace measurements or an on-site inspection.
Choose a tool for your need
Electrical power calculator
Estimate the power a home may need according to the appliances used at the same time.
Estimate powerHome EV charging calculator
Compare charging time, required power and spare contracted capacity using your own data.
Calculate chargingLED savings calculator
Compare annual consumption and savings with the wattage, hours and energy price you enter.
Calculate LED savingsCIE certificate checker
Guidance for new supplies, power increases, renovations or a distributor document request.
Check my caseElectrical panel labels
Create cut-out strips using actual millimetre measurements or a door directory, with a 10 cm scale check.
Create labelsJosé, virtual technician
Describe the case step by step and prepare useful information before contacting the company.
Talk to José REBT
Tools for professionals
Run preliminary calculations with visible formulas, official references and clear limits before checking the real installation.
Professional electrical calculator
Relate power and current, calculate voltage drop and cable size for that criterion, and look up ITC-BT-21 conduit diameters.
Open professional calculatorUseful guidance without turning the user into an electrician
The tools never ask you to dismantle fittings, open panels, bypass protection or handle wiring. If you notice smoke, a burning smell, sparks, electric shock, water or heat, stop handling the installation and request urgent help.
Does the result suggest that the installation needs checking?
The company diagnoses and repairs faults with authorised electricians, its own technicians and no subcontractors. You receive a clear price before work starts and a free written quote with no obligation.