Niglon Protego 1 Way Main Switch SPD Consumer Unit
PCU0402M/SPD – Compact 100A Consumer Unit with Type 2 Surge Protection
The Niglon Protego 1 Way Main Switch SPD Consumer Unit is a compact metal consumer unit combination developed by Electrical4Less for electricians requiring one outgoing circuit with Type 2 surge protection. Based on the original Niglon PCU0402M, this 4-module enclosure features a 100A double-pole main isolator, direct-busbar surge protection and a practical design for small electrical distribution installations.
The Electrical4Less package combines the standard Niglon Protego 2-way consumer unit with a compatible single-module Niglon Type 2 SPD and a meter tails gland. The Niglon Protego 1 Way Main Switch SPD Consumer Unit is supplied without an outgoing RCBO, allowing the installer to select the appropriate protective device for the intended circuit.
Electrical4Less Exclusive – Why 1 Way Instead of 2?
The Niglon Protego 1 Way Main Switch SPD Consumer Unit is an Electrical4Less-created combination rather than a separate factory-manufactured Niglon SPD consumer unit.
The original Niglon PCU0402M provides 2 free ways within its 4-module steel enclosure. As Niglon does not offer this particular Protego model as a standard factory-packaged SPD version, Electrical4Less combines the original consumer unit with a compatible Type 2 surge protection device.
The included single-module SPD occupies one of the two original free ways, leaving one usable outgoing way for a compatible circuit protection device.
The Type 2 SPD connects directly to the consumer unit busbar without requiring a separate MCB in this configuration. This allows the remaining way to be used for the outgoing circuit.
This explains why Niglon’s original PCU0402M datasheet specifies 2 free ways, while our Electrical4Less PCU0402M/SPD combination is advertised as a 1-way consumer unit.
Key Features and Installer Benefits
The Niglon Protego 1 Way Main Switch SPD Consumer Unit combines compact dimensions with practical Protego installation features and a convenient surge protection package.
- Electrical4Less combination of genuine Niglon Protego consumer unit and compatible Type 2 SPD.
- 4-module metal enclosure with 1 usable outgoing way after SPD installation.
- 100A double-pole main switch with twin-screw terminal arrangement.
- Single-module Type 2 SPD with direct busbar connection.
- No separate MCB required for the supplied SPD configuration.
- Meter tails gland included for incoming supply cable entry.
- Outgoing RCBO selected and purchased separately.
- Built-in spirit level to assist with accurate enclosure positioning.
- Raised DIN rail to provide additional space for cable routing.
- Multiple cable entry knockouts, including rear entry options.
- Powder-coated RAL 9010 white steel enclosure.
- IP20 ingress protection and IK05 impact resistance.
Niglon Protego Range – Designed for Electricians
The Niglon Protego range has been developed with professional electricians in mind, combining durable steel construction with installation features intended to make mounting, cable routing and conductor termination more straightforward.
The Niglon Protego 1 Way Main Switch SPD Consumer Unit uses the compact PCU0402M enclosure measuring 130mm wide, 240mm high and 110mm deep. Its small footprint makes it particularly useful where only one outgoing circuit is required and installation space is limited.
The Protego design incorporates a built-in spirit level to assist with accurate positioning before fixing the enclosure. A raised DIN rail provides additional space for routing conductors, while accessible earth and neutral terminal arrangements help installers organise connections within the limited enclosure space.
Multiple cable entry knockouts provide flexibility for surface-mounted installations and cables entering from behind the consumer unit. The curved steel cover, rounded enclosure edges and powder-coated finish provide a neat appearance suitable for visible indoor installations.
These features make the Protego range practical for both new installations and consumer unit replacements where cable entry positions, conductor lengths and available mounting space require careful consideration.
One Usable Way for Dedicated Electrical Circuits
The Niglon Protego 1 Way Main Switch SPD Consumer Unit provides one usable outgoing way after allowing for the included single-module Type 2 SPD.
This arrangement is particularly useful where an electrician needs a compact consumer unit to protect one dedicated electrical circuit without installing a larger distribution board.
Potential applications include:
- Dedicated EV charger supplies, subject to charger protection requirements.
- Suitable heat pump and heating equipment circuits.
- Single-circuit domestic distribution arrangements.
- Selected garage and outbuilding supplies.
- Dedicated supplies for suitable fixed electrical equipment.
- Small ancillary electrical installations requiring one outgoing circuit.
- Replacement of an existing single-circuit consumer unit.
The outgoing protective device must be selected according to the circuit design, load characteristics, prospective fault current and the relevant requirements of BS 7671.
For EV charging installations, additional requirements may apply, including residual current protection, DC fault protection and appropriate earthing arrangements. The suitability of the consumer unit and selected protective device must be established for the specific charger.
Type 2 Surge Protection with Direct Busbar Connection
The Niglon Protego 1 Way Main Switch SPD Consumer Unit includes a compatible Niglon Type 2 surge protection device designed to help protect connected electrical equipment against transient overvoltages.
Transient overvoltages can result from electrical switching operations and indirect lightning-related events. These short-duration voltage disturbances can affect electronic equipment and sensitive control components.
The included Type 2 SPD connects directly to the consumer unit busbar without requiring a separate protective MCB in the specified arrangement.
This is particularly beneficial in a compact 4-module enclosure because the SPD occupies only one of the original two outgoing ways, leaving one available for the required circuit protection device.
SPD installation, protective coordination, conductor connections and earthing arrangements must follow Niglon’s installation instructions and applicable BS 7671 requirements.
100A Double Pole Main Switch with Twin-Screw Terminals
The original Niglon PCU0402M consumer unit incorporates a 100A double-pole main isolator, providing a means of isolating the consumer unit assembly.
The main switch features a twin-screw terminal arrangement and is positioned on the right-hand side of the enclosure.
The manufacturer specifies a main switch terminal capacity of 35mm², rated operational voltage of 230V AC and rated frequency of 50Hz.
The 100A rating refers to the main switch and rated assembly capacity. The actual circuit rating and upstream protection must be selected according to the installation design rather than the isolator rating alone.
Meter Tails Gland Included
The Niglon Protego 1 Way Main Switch SPD Consumer Unit is supplied by Electrical4Less with a meter tails gland for incoming supply cable entry.
When correctly selected and installed, the gland helps provide a secure and tidy entry arrangement for the supply conductors, supporting a professional installation finish.
Including the gland alongside the consumer unit and Type 2 SPD means electricians can obtain these components together instead of ordering them separately.
The gland must be suitable for the cable dimensions and enclosure entry selected by the installer.
Compatible Niglon 6kA Bi-Directional RCBOs
The Niglon Protego 1 Way Main Switch SPD Consumer Unit is supplied without an outgoing RCBO, allowing electricians to choose the current rating and protective characteristics required for their installation.
An RCBO combines residual current protection with overcurrent protection within one device, providing protection against earth leakage faults, overloads and short circuits when correctly specified.
Electrical4Less supplies Niglon 6kA bi-directional RCBOs in a range of current ratings for compatible Niglon consumer unit installations.
Browse our Niglon 6kA Bi-Directional RCBOs for Consumer Units to choose the appropriate device for your circuit.
Check the selected RCBO’s breaking capacity, current rating, trip characteristic, residual current type and compatibility with the equipment being supplied.
The outgoing RCBO is not included and must be purchased separately.
Technical Specifications – PCU0402M/SPD
- Brand: Niglon
- Product range: Protego
- Electrical4Less combination SKU: PCU0402M/SPD
- Original manufacturer model: PCU0402M
- Consumer unit type: Main switch metal consumer unit with added Type 2 SPD
- Configuration: Single row with right-hand incomer
- Total modules: 4
- Original free ways: 2
- Usable outgoing ways with included SPD: 1
- Main switch: 100A double-pole isolator
- Main switch terminal arrangement: Twin screw
- Main switch terminal capacity: 35mm²
- Rated current of assembly: 100A
- Rated operational voltage: 230V AC
- Rated frequency: 50Hz
- Surge protection: Compatible single-module Type 2 SPD included
- SPD connection: Direct to busbar
- Separate SPD MCB: Not required for the supplied arrangement
- Enclosure material: Powder-coated steel
- Enclosure finish: RAL 9010 white
- Ingress protection: IP20
- Impact resistance: IK05
- Dimensions: 130mm (W) × 240mm (H) × 110mm (D)
- Consumer unit standard: BS EN 61439-3
- Main isolator standard: EN 60947-3
- Manufacturer certification: SEMKO, CE, UKCA
What’s Included in the PCU0402M/SPD Package?
- 1 × Niglon Protego PCU0402M 4-module, 2-way metal consumer unit.
- 1 × 100A double-pole main isolator fitted to the consumer unit.
- 1 × Compatible Niglon single-module Type 2 SPD.
- 1 × Meter tails gland.
- Original manufacturer-supplied busbar arrangement, earth and neutral terminal bars and standard fitting accessories.
The original consumer unit provides two free ways. The included SPD occupies one way, leaving one usable way for a separately purchased outgoing protective device.
Niglon Consumer Unit Accessories
Electrical4Less also supplies accessories for the Niglon Protego consumer unit range, including module blanks, lid magnets and selected mounting accessories for compatible enclosures.
Explore our Niglon Consumer Unit Accessories category to find additional components for completing your installation.
Always confirm compatibility with the PCU0402M enclosure before purchasing accessories.
Explore Other Niglon Protego Consumer Units
The Niglon Protego 1 Way Main Switch SPD Consumer Unit is the smallest Electrical4Less SPD combination in this Protego selection, making it suitable where only one outgoing circuit is needed.
For installations requiring additional circuits, Electrical4Less offers larger Protego SPD combinations, including 3-way, 7-way, 11-way and higher-capacity consumer units.
Browse our Niglon Protego Consumer Units selection to compare different enclosure sizes and circuit capacities.
For more protective devices, surge protection products and electrical installation materials, explore our Niglon Electrical Products Range.
Manufacturer Technical Datasheet
For the original consumer unit dimensions, electrical ratings and manufacturer information, view the Niglon PCU0402M Technical Datasheet.
The manufacturer’s datasheet refers to the original two-way PCU0402M consumer unit before the single-module SPD is added to the Electrical4Less package.
Why Choose Electrical4Less?
Electrical4Less is an independent UK electrical wholesaler supplying electricians, electrical contractors and installers with consumer units, circuit protection devices and electrical installation accessories.
We created the Niglon Protego 1 Way Main Switch SPD Consumer Unit combination to provide a compact solution containing genuine Niglon Protego equipment, Type 2 surge protection and a meter tails gland.
With a 100A double-pole main switch, one usable outgoing way and installer-friendly Protego enclosure features, the PCU0402M/SPD offers a practical option for suitable single-circuit distribution installations.
Order the Niglon Protego 1 Way Main Switch SPD Consumer Unit from Electrical4Less and select the appropriate Niglon RCBO separately to complete your installation.
