FuseBox F2 Series 22 Way Consumer Unit User Guide
- June 9, 2024
- FuseBox
Table of Contents
FuseBox Consumer Unit (F2 Series)
User guide
Technical information
1 a. FuseBox metal consumer unit must be installed by a qualified
electrician in accordance with the current IET Wiring Regulations BS7671.
1 b. Total load must not exceed the rating of the incoming isolator or
any additional limitation.
1 c. The total sum of the individual MCBs/ RCBOs may exceed this value
where there is appropriate diversity in the installation.
1 d. The Consumer Unit and associated components have been manufactured
to the following specifications:
Standards (TABLE 1)
| Device | Standard |
|---|---|
| Consumer Unit | BS EN 61439-3 |
| Main Switch | EN 60947-3 |
| RCD | EN 61008-1 |
| MCB | EN 60898-1 |
| RCBO | EN 61009-1 |
| SPD | EN 61643-11 |
| IP RATING | IP2XC |
1 e. Ambient Temperature: MCBs are calibrated at 30°C according to the
calibration temperature requirements of BSEN60898. At other temperatures the
following rating factors should be used: At 60°C 0.85 At 20°C 1.0 At 0°C 1.15
1 f. Adjacent thermal-magnetic MCBs should not be continuously loaded at
their nominal rated currents when mounted in enclosures. We recommend a 60%
de-rating factor is applied to the MCBs nominal rated current where it is
intended to load the MCBs continuously
Enclosure Mounting
2 a. Remove front cover (2x captive screws).
2 b. Din rail assembly can be removed if preferred to make mounting on to
wall and first fix easier.
2 c. Remove minimum appropriate knockouts with a punch, in order to
maintain the IP rating and fire containment of the enclosure. We recommend
glands are used to secure the incoming cables and grommet strip is used on the
rear knockouts to prevent possible damage to the cable insulation.
2 d. Fix base to wall using screws and rawl plugs as appropriate and
remove any debris from inside the consumer unit.
2 e. Adjust to the square and route incoming cables to desired positions.
Connection of Tails
3 a. Cut and dress the main incoming cables and earth conductor and route L and N to the incomer (main switch or RCD). A tail clamp (PN: ACCF) can be fitted to the majority of FuseBox consumer units.
Installation of devices
4 a. MCBs and or RCBOs should be clipped on the Din Rail,
4 b. Cut, dress and connect circuit conductors to appropriate MCBs or
RCBOs neutral and earth terminals.
4 c. The incoming supply for time switches, installation contactors, bell
transformers etc must be fed from an MCB (not directly from the busbar).
Torque Settings (TABLE 2)
| Device | Max Cable Capacity | Recommended Torque |
|---|---|---|
| Main Switch | 35mm² | 2.5Nm |
| RCD | 35mm² | 2.5Nm |
| MCB | 16mm² | 2.5Nm |
| RCBO | 16mm² | 2.5/1.2Nm |
| SPDCUT2 | 16mm² | 2.5/1.2Nm |
| Earth/Neutral Terminals | 16mm² | 2.0Nm |
4 d. ALL CONNECTIONS (including factory made connections) MUST BE TORQUED
(TABLE 2 above).
4 e. Make sure that each earth and neutral outgoing circuit is correctly
made to the corresponding numbered terminals.
4 f. Module blanks must be fitted to cover any spare modular ways on the
cover.
Circuit Identification
5 a. All circuits must be clearly marked on the front cover. Pre-printed labels are supplied in the accessory pack.
Operation of the TEST button on RCD/RCBO (if fitted)
6 a. When newly fitted systems do not trip on the TEST button or using the RCCB tester the problem is normally caused by an earth to neutral fault on the circuit (PME supply).
Testing
7 a. After completion of the installation, it must be tested in
accordance with the latest edition of the IET Wiring Regulations for
Electrical Installations (BS 7671).
Main switch & SPD layout (with 32A MCB fitted)
DUAL RCD & SPD layout (with 32A MCB fitted)
CAUTION
Before fitting the front cover, check all connections including factory
made connections are TORQUED. Loose connections can cause fires!!!!
What To do if an MCB OR RCBO trips to OFF position
MCB/RCBO TRIPPED (OFF POSITION)
- TRY TO RESET MCB/RCBO (SWITCH TO ON POSITION)
- IF MCB/RCBO RESETS TO ON POSITION USE AS NORMAL
- IF MCB/RCBO DOES NOT RESET TO ON POSITION AND IS A SOCKET CIRCUIT, UNPLUG ALL APPLIANCES.
- NOW TRY TO RESET MCB/RCBO TO ON POSITION WITH ALL APPLIANCES UNPLUGGED.
- IF MCB/RCBO DOES NOT RESET TO ON POSITION CALL AN ELECTRICIAN.
- IF MCB/RCBO RESETS TO ON POSITION WITHOUT APPLIANCES PLUGGED IN,THERE IS A POSSIBLE FAULT WITH AN APPLIANCE. PLUG IN ONE APPLIANCE AT A TIME UNTIL THE MCB/RCBO TRIPS TO THE OFF POSITION.
- A FAULTY APPLIANCE WILL TRIP THE MCB/RCBO TO THE OFF POSITION
- THIS FAULTY APPLIANCE MUST NOT BE PLUGGED IN UNTIL IT IS TESTED AND REPAIRED BY A QUALIFIED PERSON.
What To do if an RCD trips to OFF position
RCD TRIPPED (OFF POSITION)
- IF RCD RESETS TO ON POSITION USE AS NORMAL
- IF RCD DOES NOT RESET TO ON POSITION SWITCH OFF ALL MCBS TO THE LHS OF THE RCD
- IF RCD NOW RESETS TO ON POSITION WITH ALL MCBS IN OFF POSITION, THEN SWITCH ON ONE MCB AT A TIME
- IF THE RCD TRIPS (OFF) WHEN YOU ARE SWITCHING ON AN MCB THIS IS THE CIRCUIT WITH THE FAULT.
- IF MCB IS A SOCKET CIRCUIT, UNPLUG ALL APPLIANCES CONNECTED TO THAT CIRCUIT.
- PLUG IN ONE APPLIANCE AT A TIME UNTIL THE RCD TRIPS TO THE OFF POSITION
- THIS FAULTY APPLIANCE MUST NOT BE PLUGGED IN UNTIL IT IS TESTED AND REPAIRED BY A QUALIFIED PERSON.
- IF THE MCB IS NOT A SOCKET CIRCUIT OR AFTER THESE CHECKS IF THE RCD DOES NOT RESET TO ON POSITION PLEASE CALL AN ELECTRICIAN
www.cpelectric.co.uk
www.fusebox.co.uk
After installation and testing of this product it is essential that
the INSTRUCTION LEAFLET is available for reference.
Read User Manual Online (PDF format)
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