Why Choose the ABB EPH-S17218 Protecta Home 18-Way Consumer Unit?
The ABB EPH-S17218 is an 18-way split-load consumer unit from the ABB Protecta Home range, designed for residential and light commercial electrical distribution installations. Featuring a 100 A main switch isolator, one 80 A RCCB and one 63 A RCCB, this consumer unit provides central supply isolation and two separately protected residual current circuit groups.
The EPH-S17218 combines 18 outgoing circuit ways with a variable split-load arrangement, allowing electricians to allocate compatible miniature circuit breakers across the two RCCB-protected sections. The differing RCCB current ratings provide flexibility when designing the distribution arrangement, while the 100 A main switch offers a convenient means of isolating the consumer unit supply.
Housed in a robust steel enclosure measuring 250 × 490 × 105 mm, the ABB EPH-S17218 provides substantial circuit capacity in a practical single-row format. Its Protecta Home design supports professional electrical installation, circuit organisation and maintenance, making it suitable for installations requiring an 18-way distribution board with dual RCCB protection.
Key Advantages
- 18-way split-load consumer unit provides capacity for multiple outgoing electrical circuits.
- 100 A main switch isolator enables central isolation of the consumer unit supply.
- One 80 A RCCB and one 63 A RCCB provide two residual current protection groups.
- Variable split-load arrangement supports flexible outgoing circuit allocation.
- Part of the established ABB Protecta Home electrical distribution range.
- Steel enclosure construction provides a durable housing for modular protection equipment.
- 18 outgoing ways accommodate a broad range of domestic and light commercial circuits.
- Separate RCCB groups support organised distribution of electrical loads.
- 250 × 490 × 105 mm nominal dimensions assist installation planning.
- Suitable for use with appropriately selected compatible ABB circuit protection devices.
- Practical solution for new installations, consumer unit replacement and electrical refurbishment.
- Genuine ABB product identified by manufacturer order code 1TVC151800S3073.
Key Features
- ABB Protecta Home consumer unit series.
- EPH-S17218 18-way split-load consumer unit.
- 18 outgoing circuit ways.
- 100 A main switch disconnector / isolator.
- 1 × 80 A residual current circuit breaker.
- 1 × 63 A residual current circuit breaker.
- Two RCCB-protected outgoing circuit groups.
- Variable split arrangement for circuit distribution.
- Durable steel enclosure construction.
- Single-row electrical distribution format.
- Central isolation through the main switch.
- Residual current protection through two separately rated RCCBs.
- Supports compatible modular outgoing circuit protection devices.
- Designed for professional electrical installation and maintenance.
- Nominal height: 250 mm.
- Nominal width: 490 mm.
- Nominal depth: 105 mm.
- ABB manufacturer order code 1TVC151800S3073.
Flexible 18-Way Distribution with 80 A and 63 A RCCB Protection
The ABB EPH-S17218 is designed for electrical installations requiring a substantial number of outgoing circuits within a single consumer unit. Its 18-way configuration provides flexibility for distributing lighting, socket outlets, fixed appliances, heating equipment and other electrical loads using appropriately selected circuit protection devices.
The consumer unit incorporates a 100 A main switch isolator, providing a central means of disconnecting the incoming supply. The outgoing circuits can be distributed between one 80 A RCCB and one 63 A RCCB, creating two separate residual current protection groups.
Unlike consumer units equipped with two identically rated RCCBs, the EPH-S17218 features different RCCB current ratings. This arrangement allows the electrical designer to consider the anticipated loading of each group when allocating circuits. The 80 A and 63 A ratings represent the current-carrying capacities of the respective RCCBs and must not be confused with their residual current operating sensitivities.
ABB specifies a variable split arrangement for the Protecta Home RCCB split-load consumer unit range. This enables outgoing ways to be allocated between the RCCB groups according to the approved busbar arrangement and installation requirements, rather than assuming a permanently fixed division of nine ways per group.
Each RCCB monitors residual current imbalance in its associated circuit group and disconnects that group when the device's specified operating conditions are met. However, an RCCB does not independently provide overload or short-circuit protection. Compatible miniature circuit breakers or other suitable overcurrent protective devices are therefore required for outgoing circuits.
Separating circuits across two RCCBs can reduce the number of circuits affected by a single residual current trip compared with an installation using one shared RCCB. Nevertheless, a fault on one circuit may still disconnect other circuits connected to the same RCCB. Circuit allocation should therefore consider continuity of supply, connected equipment and applicable electrical installation regulations.
The steel enclosure provides a robust housing for the electrical distribution assembly, while its nominal dimensions of 250 × 490 × 105 mm support installation planning. Final device selection, conductor sizing, RCCB sensitivity, circuit allocation and installation methods must comply with ABB instructions and the applicable wiring regulations.
Typical Applications
- Residential electrical consumer unit installations.
- Domestic distribution boards requiring up to 18 outgoing circuit ways.
- Split-load electrical distribution with two RCCB-protected groups.
- Electrical installations requiring a 100 A main switch isolator.
- Distribution boards requiring one 80 A and one 63 A RCCB.
- Lighting, socket outlet and fixed appliance circuit distribution.
- Larger residential properties with multiple electrical circuits.
- Light commercial electrical distribution systems.
- Consumer unit replacement and electrical refurbishment projects.
- Professional electrical contracting and building services installations.
