Why Choose the ABB EPH-S17212 Protecta Home 12-Way Split-Load Consumer Unit?
The ABB EPH-S17212 Protecta Home Consumer Unit, manufacturer order code 1TVC151800S3071, is a 12-way, 100 A main switch split-load consumer unit designed for residential low-voltage electrical distribution. Part of ABB's Protecta Home steel enclosure range, it combines a 100 A incoming isolator with two residual current circuit breakers (RCCBs), providing a coordinated foundation for domestic circuit protection.
Identified by ABB as EPH-S17212 12W 100A ISO 1x80A+63A RC, this consumer unit incorporates a 100 A main switch-disconnector, one 80 A RCCB and one 63 A RCCB. The two RCCBs provide separate residual current protection groups, allowing outgoing circuits to be distributed between independently protected sections according to the installation design.
The EPH-S17212 belongs to ABB's Protecta Home split-load (SL) consumer unit range. ABB identifies this configuration as a 100 A main switch assembly with 80 A and 63 A RCCBs, offering a variable split arrangement for its 12 outgoing circuit ways.
With nominal enclosure dimensions of 250 mm high × 380 mm wide × 105 mm deep, the ABB EPH-S17212 provides a compact distribution solution for installations requiring two RCCB-protected circuit groups. Its steel enclosure construction and coordinated ABB electrical components make it suitable for professional consumer unit assembly, refurbishment and replacement applications.
For electrical contractors and installers, the ABB 1TVC151800S3071 provides a convenient alternative to a main switch-only consumer unit where a dual-RCCB split-load arrangement is appropriate for the installation.
Key Advantages
- 12 outgoing circuit ways: Provides capacity for multiple domestic electrical circuits.
- 100 A main switch: Provides central isolation of the consumer unit supply.
- Dual RCCB arrangement: Incorporates separate 80 A and 63 A residual current circuit breakers.
- Split-load configuration: Allows outgoing circuits to be arranged across two RCCB-protected groups.
- Variable circuit split: Supports an installation-specific allocation of outgoing circuit ways.
- Genuine ABB product: Part of the Protecta Home residential electrical distribution range.
- Steel enclosure: Provides a robust housing for the electrical distribution assembly.
- Compact dimensions: Nominal 250 × 380 × 105 mm construction supports practical installation planning.
- Coordinated incoming protection: Main isolator and RCCBs are included in the specified configuration.
- Organised circuit grouping: Supports the separation of selected outgoing circuits between residual current protection sections.
- Professional installation: Suitable for qualified electricians assembling domestic distribution systems.
- Residential applications: Designed for appropriately configured household electrical installations.
- Flexible outgoing protection: Compatible circuit breakers can be selected to suit individual circuit requirements.
- Clear product identification: ABB order code 1TVC151800S3071 supports accurate procurement.
- Range consistency: Coordinates with other ABB Protecta Home consumer unit products and approved accessories.
Key Features
- Manufacturer: ABB.
- Product range: Protecta Home.
- Model: EPH-S17212.
- ABB order code: 1TVC151800S3071.
- Manufacturer description: EPH-S17212 12W 100A ISO 1x80A+63A RC.
- Product type: Split-load consumer unit.
- Consumer unit series: Protecta Home SL.
- Number of outgoing ways: 12.
- Main switch rating: 100 A.
- Incoming switching device: Main switch-disconnector.
- First RCCB rating: 80 A.
- Second RCCB rating: 63 A.
- Number of RCCBs: 2.
- Residual current protection arrangement: Dual RCCB split load.
- Circuit allocation: Variable split arrangement.
- Enclosure construction: Steel.
- Nominal height: 250 mm.
- Nominal width: 380 mm.
- Nominal depth: 105 mm.
- Primary application: Residential electrical distribution.
Reliable 100 A Split-Load Distribution with Dual RCCB Protection
The ABB EPH-S17212 provides a practical electrical distribution solution where a 12-way split-load consumer unit is required. Its 100 A main switch provides central isolation, while the separate 80 A and 63 A RCCBs allow groups of outgoing circuits to benefit from residual current protection.
The dual RCCB configuration allows an electrical designer to allocate selected final circuits between two protected sections. This can help distribute circuits across separate residual current protection devices, although a fault affecting one RCCB group may disconnect all circuits supplied through that RCCB.
The 80 A and 63 A ratings identify the rated currents of the two RCCBs. They do not specify the residual operating current or the RCCB type. Those characteristics must be confirmed from the actual devices and manufacturer documentation before installation.
Unlike an RCBO, an RCCB does not provide individual circuit overcurrent protection. Each outgoing circuit must therefore have suitable overcurrent protection, typically through a compatible miniature circuit breaker selected for the circuit's design current, cable characteristics and fault protection requirements.
ABB describes the Protecta Home RCCB split-load consumer units as having a variable split arrangement. This allows the number of outgoing ways assigned to each RCCB section to be planned according to the installation requirements, subject to the manufacturer's approved busbar and assembly arrangements.
The 100 A incoming switch-disconnector provides a central means of isolating the consumer unit. Its rated current must not be confused with the separate RCCB current ratings or the permissible loading of individual outgoing circuits.
The EPH-S17212 uses a steel enclosure with nominal dimensions of 250 × 380 × 105 mm. The enclosure width accommodates the incoming switching arrangement, two RCCBs and the specified outgoing circuit capacity, making it important to allow adequate wall space and suitable cable entry arrangements.
Correct circuit allocation is essential in a split-load consumer unit. Each circuit's live and neutral conductors must be associated with the correct RCCB group, and neutral connections must not be interchanged between independently protected sections. Incorrect neutral allocation can cause unwanted tripping or compromise the intended protection arrangement.
For residential installations in the United Kingdom, the completed assembly must comply with the relevant requirements of BS 7671, including appropriate residual current protection, overcurrent protection, isolation, circuit identification and verification.
The ABB EPH-S17212 is particularly suitable where a conventional dual-RCCB split-load arrangement is appropriate. Installers should assess whether the circuit requirements call for additional measures, such as individual RCBO protection, surge protection or arc fault detection, before finalising the distribution board design.
Typical Applications
- Residential split-load consumer unit installations.
- Domestic 12-way electrical distribution boards.
- Household electrical installation upgrades.
- New-build residential electrical systems.
- Apartment and flat electrical distribution.
- Domestic consumer unit replacement projects.
- Dual RCCB-protected circuit arrangements.
- Lighting and socket outlet circuit distribution.
- Residential electrical refurbishment projects.
- Distribution boards requiring 100 A main isolation.
- Installations requiring separate RCCB-protected circuit groups.
- Electrical service cupboards and utility areas.
- Professional consumer unit assembly.
- Electrical contracting and maintenance applications.
