2026 تحديث اللائحة الإسبانية لعام 2026: النوع A RCD يصبح المعيار الجديد لسلامة التوزيع

Spain does not have a simple rule stating that every circuit protected by an RCD must use Type A. The correct device depends on the residual-current waveform that can be produced by the connected equipment, the installation’s earthing and protection design, the manufacturer’s instructions, and the Spanish low-voltage rules that apply to the project.

إجابة سريعة: Spain’s REBT requires suitable protection against electric shock and recognises the use of residual-current devices. The Ministry’s ITC-BT-24 application guide explains Type AC, A, F and B characteristics. Type A is a common choice for modern single-phase electronic loads because it detects sinusoidal AC and specified pulsating DC residual currents, but Type F or Type B may be required for other waveforms. Type AC remains a defined category; its suitability must be assessed rather than assumed.

Spain RCD Regulations: The Documents That Matter

The consolidated REBT text published by Spain’s BOE is the primary legal reference. The Ministry’s BT-24 guide helps designers interpret device characteristics, but the guide itself states that it is not binding. Project specifications and autonomous-community procedures may add practical documentation requirements.

Does Spain Require Type A RCDs?

There is no support in the general REBT text for the blanket statement that “all circuits requiring RCD protection must use Type A.” The correct conclusion is narrower: an RCD must be suitable for the expected residual-current waveform and the relevant installation requirements. As electronic loads become more common, Type A is often selected because its waveform capability extends beyond Type AC.

Type AC, A, F and B Under the Spanish BT-24 Guide

Type A is sometimes described as detecting “up to 6 mA DC.” That wording can be misleading. The official guide describes Type A operation for specified waveforms with a superimposed smooth DC component up to 0.006 A. This is not the same as saying that a Type A RCD is a general-purpose smooth DC protective device.

How to Choose the Correct RCD Type in Spain

1. Identify the Connected Equipment

List appliances, power supplies, dimmers, heat pumps, variable-speed motors, EV chargers, PV inverters and battery systems. Use the equipment manufacturer’s specified RCD type when provided.

2. Determine the Possible Residual-Current Waveform

The circuit topology matters more than the marketing category of the appliance. A rectifier, inverter or frequency converter can produce waveforms that require Type A, F or B characteristics.

3. Select the Protection Function and IΔn

Choose the rated residual operating current for the required protection function and disconnection time. A 30 mA device is widely used for additional protection where required, while other sensitivities can be used for suitable upstream, fault or fire-protection functions. Follow the applicable ITC and project design.

4. Choose RCCB or RCBO

أن RCCB provides residual-current protection and normally needs coordinated overload and short-circuit protection. An RCBO combines residual-current and overcurrent protection for one circuit.

5. Verify Selectivity and Circuit Subdivision

If RCDs are installed in series, the REBT requires selectivity between them. Check sensitivity grading, time delay, manufacturer coordination data and the required disconnection times. Circuit subdivision or individual RCBOs can reduce unnecessary loss of supply.

RCD Selection by Application

Type A-SI, High-Immunity and Selective RCDs Are Not the Same

Terms such as SI, super-immunised or high-immunity are often manufacturer-specific designations. They generally describe improved resistance to unwanted tripping from transients or high-frequency disturbances, but the exact performance must be read from the manufacturer’s documentation. They do not automatically add Type B smooth-DC detection.

A Type S RCD is a selective or time-delayed device used in suitable upstream arrangements. “SI” and “S” should not be treated as interchangeable. The device still needs the correct residual-current type—AC, A, F or B—and must comply with required disconnection times.

Common Compliance Mistakes in Spanish Projects

• Writing “Type A required everywhere” without identifying the REBT or ITC clause.
• Using Type A for an EV charger or inverter without checking DC residual-current requirements.
• Treating CE marking as proof that a specific installation design complies.
• Confusing an RCCB’s conditional short-circuit rating with an RCBO’s breaking capacity.
• Using 100 mA where 30 mA additional protection is required.
• Installing several instantaneous 30 mA devices in series and assuming selectivity.
• Choosing high-immunity equipment before investigating neutral faults, moisture or excessive standing leakage.
• Relying on a translated product label without checking the EU Declaration of Conformity and exact model reference.

Documents to Request from an RCD Supplier

• EU Declaration of Conformity for the exact model
• Applicable UNE-EN/EN/IEC product standard
• Model-specific test certificate or report
• RCD type, In, IΔn, poles, voltage and frequency
• Conditional short-circuit and backup-protection information
• Operating-time curves and selectivity data
• Terminal capacity, torque and environmental limits
• Spanish or project-required installation information
• Traceability, warranty and change-control procedure for repeat orders

AENOR certification can be requested by a client or tender, but it should not be described as universally mandatory for every RCD sold in Spain. The exact conformity route and documentation should be checked for the product and project.

الأسئلة الشائعة

Are Type AC RCDs banned in Spain?

The general REBT does not establish a simple universal ban. Official BT-24 guidance describes Type AC as a recognised type, but it may be unsuitable for circuits that can produce pulsating DC or other residual-current waveforms.

Is Type A mandatory in every Spanish home?

Do not assume a blanket mandate. Type A is often selected for modern electronic loads, but the correct device follows the circuit, equipment instructions and applicable REBT/UNE requirements.

What is the difference between Type AC and Type A?

Type AC responds to sinusoidal AC residual currents. Type A also responds to specified pulsating DC residual currents and conditions defined by its standard.

Can Type A be used for EV charging in Spain?

It may be used in an approved arrangement when the EVSE includes suitable 6 mA DC residual-current detection and the equipment instructions and ITC-BT-52 requirements are satisfied. Otherwise Type B may be required.

Does Type A always work with a solar inverter?

No universal answer applies. Follow the inverter manufacturer’s instructions because topology and internal residual-current monitoring differ.

What does 63 A / 30 mA mean?

63 A is the rated current In. 30 mA is the rated residual operating current IΔn. They describe separate characteristics.

Is a high-immunity Type A the same as Type B?

No. Improved immunity to unwanted tripping does not by itself provide the smooth-DC detection characteristics of Type B.

Who should verify compliance for a Spanish installation?

A competent designer or authorised installer should apply the current REBT, relevant ITCs, UNE standards, equipment instructions and any regional or project requirements.

KUANGYA RCD Options for Spain and EU Projects

KUANGYA supplies Type A and other residual-current device options for residential, commercial and OEM projects. Product selection should start with the required waveform type, poles, In, IΔn, overcurrent arrangement and documentation—not with a general claim that one RCD type fits every circuit.

For model-specific selection, certification documents and quotations, review the RCCB product range أو اتصل بـ KUANGYA. Always confirm the final installation design with a qualified professional familiar with the current Spanish rules.