Why Choose the ABB EPH-S17208 Protecta Home 8-Way 100A Dual RCD Consumer Unit?
The ABB EPH-S17208 (ABB order code 1TVC151800S3070) is an 8-way, 100 A split-load consumer unit from the ABB Protecta Home range. Designed for low-voltage electrical distribution, this consumer unit combines a 100 A main switch isolator with two residual current devices (RCDs), rated at 80 A and 63 A respectively. This configuration provides a practical solution for suitable residential electrical installations requiring two RCD-protected circuit groups.
Identified by ABB as EPH-S17208 8W 100A ISO 1x80A+63A RC, the unit provides eight outgoing ways within a coordinated split-load arrangement. The two RCDs allow outgoing circuits to be divided between separately protected sections, with the exact allocation determined by the approved consumer unit configuration and installation requirements.
The EPH-S17208 features nominal enclosure dimensions of 250 × 330 × 105 mm (H × W × D), as listed in ABB's Protecta Home consumer unit selection guide. The compact format makes it suitable for installations where eight outgoing ways are sufficient and a larger distribution board would be unnecessary.
With a 100 A incoming isolator, an 80 A RCCB and a 63 A RCCB, the ABB EPH-S17208 offers a defined dual-RCD configuration for professional electrical installers. The main switch provides incoming isolation, while the RCCBs provide residual current protection to their associated outgoing circuit groups. Appropriate overcurrent protection must be provided separately for the final circuits.
Key Advantages
- Eight outgoing ways provide capacity for a compact multi-circuit distribution arrangement.
- 100 A main switch isolator provides a dedicated incoming isolation function.
- 80 A RCCB provides residual current protection for one circuit group.
- 63 A RCCB provides residual current protection for a second circuit group.
- Dual-RCD split-load configuration supports planned separation of outgoing circuits.
- Different RCCB current ratings allow the installer to work with the manufacturer's specified 80 A and 63 A arrangement.
- Compact 330 mm nominal width makes the enclosure suitable for smaller distribution installations.
- 250 mm nominal height supports a space-efficient enclosure format.
- 105 mm nominal depth assists wall-mounting and cable-routing planning.
- ABB Protecta Home design provides a coordinated electrical distribution solution.
- Separate incoming isolation and residual current protection provide clearly defined electrical functions.
- Suitable for compatible outgoing MCB arrangements selected to match the installation design.
- Part of ABB's wider Protecta Home range with alternative capacities and RCD configurations.
- Practical for residential refurbishment and new electrical installations.
- Manufacturer order code 1TVC151800S3070 supports accurate product identification and specification.
Key Features
- ABB EPH-S17208 Protecta Home consumer unit.
- Eight outgoing ways.
- 100 A incoming main switch isolator.
- One 80 A RCCB.
- One 63 A RCCB.
- Dual-RCD split-load arrangement.
- Two separately RCD-protected circuit sections.
- 250 mm nominal enclosure height.
- 330 mm nominal enclosure width.
- 105 mm nominal enclosure depth.
- Compact single-row consumer unit format.
- Incoming supply isolation through the main switch.
- Residual current protection through the two RCCBs.
- Compatible outgoing protective device accommodation.
- ABB Protecta Home product family.
- Suitable for professional electrical installation.
- Manufacturer model EPH-S17208.
- ABB order code 1TVC151800S3070.
- Manufacturer designation 8W 100A ISO 1x80A+63A RC.
100A Main Switch with 80A and 63A RCCB Protection
The ABB EPH-S17208 is designed around a specific combination of electrical devices: a 100 A incoming isolator, an 80 A RCCB and a 63 A RCCB. This differs from Protecta Home consumer units fitted with two identically rated RCCBs and provides an alternative arrangement for projects requiring the manufacturer's mixed-rating dual-RCD configuration.
The 100 A main switch provides the incoming isolation function for the consumer unit. It is used to disconnect the supply to the assembly when appropriate. The switch's rated current must not be confused with the permissible load of the individual outgoing circuits or the rated current of either RCCB.
The 80 A RCCB provides residual current protection for one section of the consumer unit. Its 80 A rating represents the device's rated current-carrying capacity, subject to its installation conditions and coordination. It does not describe the amount of earth leakage required to operate the device.
The 63 A RCCB provides corresponding residual current protection for the other section. The two RCCBs have different rated currents, so the installer must ensure that the proposed circuit allocation, upstream protection and expected loading are appropriate for each device.
ABB's Protecta Home selection guide notes that RCCB split consumer units have a variable split arrangement. The precise allocation of the eight outgoing ways between the two RCCBs should therefore be confirmed against the supplied assembly and manufacturer's installation instructions rather than assuming a fixed four-way/four-way division.
Although the consumer unit provides two RCD-protected sections, an earth leakage fault on a circuit may disconnect other circuits supplied through the same RCCB. Where a design requires more individualised fault protection or improved continuity of supply, the electrician should consider whether a compatible RCBO-based arrangement is more appropriate.
The RCCBs do not replace outgoing overcurrent protective devices. Suitable MCBs or other approved protective devices must be provided for overload and short-circuit protection. The selected equipment must be compatible with the ABB busbar system, enclosure arrangement and completed assembly specification.
The nominal enclosure dimensions of 250 × 330 × 105 mm should be considered during installation planning. Sufficient space must be allowed for mounting, conductor routing, cable entry, access to protective devices and the safe operation of the main switch and RCCBs.
Installation, inspection and commissioning must be undertaken by a competent electrical professional in accordance with ABB's instructions and applicable requirements of BS 7671. The installer must confirm RCCB sensitivity and type, circuit grouping, neutral conductor separation, device compatibility, earthing arrangements and final electrical test results.
Typical Applications
- Residential electrical distribution installations requiring eight outgoing ways.
- Domestic split-load consumer unit replacement projects.
- Electrical refurbishment involving two RCCB-protected circuit groups.
- New-build residential electrical installations.
- Compact multi-circuit domestic distribution.
- Installations requiring a 100 A incoming main switch.
- Projects specifying an 80 A and 63 A RCCB combination.
- Residential electrical installation upgrades.
- Professional electrical contracting projects.
- Suitable indoor electrical service areas.
- Low-voltage final-circuit distribution assemblies.
- Projects requiring planned separation of outgoing circuits between two RCCBs.
- Replacement of appropriately specified dual-RCD consumer units.
- Installations using compatible ABB outgoing protective devices.
- Projects specifying the ABB Protecta Home consumer unit range.
