GB
Design 50 Flush Consumer Unit
Instructions/Data Sheet
This Consumer Unit and Hager devices conform with the following standards:
Consumer Unit: BS EN 61439-3 including Annex ZB.
Switch-disconnectors: BS EN 60947-3.
Residual Current Circuit Breaker (RCCB): BS EN 61008-1
Residual current operated circuit breaker with integral overload (RCBO): BS EN 61009-1
Miniature Circuit Breaker (MCB): BS EN 60898-1
Passed hot-wire fire test for “non-combustible enclosure” in context of Regulation 421.1.201
indent (i) in BS 7671.
ZD0831ZD0831
Installation Instructions:
All product(s) must be installed by a suitably competent electrician
Giving consideration to their intended use and in accordance with the current edition of BS 7671 (IET Wiring Regulations).
The Electricity at Work regulations and the Health and Safety at Work Act shall be complied with.
Only equipment and arrangements specied in Hager’s technical documentation / catalogue shall be used.
Install in the horizontal plane only.
Important notice:
To prevent potential overheating from loose connections the installer shall check connections are tight to the torque levels stated in these instructions
prior to energizing this board. This check should include factory made connections which may have loosened in transit.
Guidance Notes:
The total load must not exceed the rating of the incoming device or the assigned assembly rating (InA) whichever is the lower. Each neutral and earth
connection must correspond numerically to its outgoing way. Additional blanks (ref. JK01B) are available to cover spare ways.
A pack is provided to label this consumer unit, please consult us for spares or replacements.
Operating Instruction leaet is provided overleaf. This leaet should be left for the end user.
Single conductors below 1.5mm² need to be doubled back in the terminal bar.
Consumer Units incorporating RCDs in TT systems should incorporate an S type (time Delayed) RCCB, e.g. 100 mA s-type RCCB . Alternatively a main
switch with RCBO protection on all outgoing circuits should be used.
Precautions need to be taken to prevent faults to earth on the supply side of the RCD (as per BS7671 regulation 531.4.1)
For guidance when making connections in a consumer unit electrical safety rst /BEAMA document
“Guidance for installers when making connections in consumer units” is available from
hager.co.uk/63026.htm
Cable Access:
Cable access into the metal consumer unit must maintain the integrity of the non-combustable
consumer unit so far as reasonably practicable. This can generally be achieved by the installer
ensuring that cable access holes they make in the enclosure do not to leave gaps greater than:
· 2.5 mm for all other surfaces of the enclosure that are accessible after installation.
For rear cable access, the minimum number of knockout(s) shall be removed.
Tests on hager consumer units have indicated that there is no specic need for external re rated
cable glands or intumescent sealing in addition to the guidance below, with respect to achieving a non-combustible enclosure. However this does not
preclude the designer/installer from using re rated cable glands or external intumescent sealing should they consider necessary. Internal intumescent
pads shall not be used.
Cables >1.5mm
Torque Settings
Consumer unit terminals
Earth and neutral terminal bars 2 6.5 2 2 1.5 1.5 10
Isolation
SB switch disconnectors 2 6.5 3.6 3.6 3.6 3.6 15
Circuit protection
MTN MCB 2 6.5 2.8 2.8 2.8 2.8 13
NBN/NCN/NDN MCB 2 6.5 2.8 2.8 2.8 2.8 13
RCBO 2 5.5 2.1 2.1 2.1 2.1 13
RCCB 2 5.5 2.8 2.8 2.8 2.8 13
Pz No. (mm)
Tightening torque (N.m)
Single Cable Multi Cables Single Cable Multi Cable
2
2.5mm
Cables ≤1.5mm
Tightening torque (N.m)
2
2.5mm
Cable Stripping
(mm)
1
ZD0831 - Issue 2 9-16
1
2
Remove internal chassis.
(No requirement to disconnect factory cable connections)
3
Box must be level at this stage
Pozi N°8 or N°10
Box dimensions on page 4
Back box xing points
Fixing height 1320mm ± 50mm from back box bottom
face to the nished oor (Part M)
5
Remove required KO’s before xing to stud wall &
use provided grommet strip or grommet accessory
VMGROM for cable protection
4
st
x
1
complete
Top & bottom edge to be ush with front of stud work, with
left and right edges protruding slightly from stud work
6
ZD0831 ZD0831
2
Trim excess plaster from around
the box, loosely t x4 M5 wing
nut to back box
7
Push internal chassis until it is ush with
the wall surface. Tighten x4 M5 wing nut to
secure internal chassis
Offer up internal chassis, loacting chassis on
the metal studs
8
2nd x
complete
After wiring installation, offer up cover &
door assembly, secure with the captive
screws.
ZD0831 - Issue 2 9-16
Loading...