CIRCUIT
PROTECTION
Flexible solutions to support
17th Edition Wiring Regulations compliance
Circuit Protection
•
•
•
•
Modern stylish design with a profile that matches Nexus wiring accessories
Quality designed in
Flexibility for maximum circuit combinations, and easy upgrades
Fast and simple installation
• Smooth finish enables easy cleaning
• Rigid robust construction
• UV stable will not discolour with sunlight or age
• Hooded trunking entry
enables neat finish
• Easy cable entry all sides
and rear, via standard
trunking cut-outs
• Easy fit cover provides
quick fit to base and caters
for uneven wall surfaces
• Quick removal of cover
using ¼ turn combi screws
• With a solid downward opening
visor to cover devices
• Consumer unit and devices tested to all relevant standards
02
Circuit Protection
• Large accessible wiring space provided by lower
base walls, raised DIN rail, wide device to terminal
distance and offset main switch
• Captive backed out terminal screws provides
fast connection and no loss of screws
• Optional 5 point fixing of base
caters for uneven wall surfaces
• Ensured cable retention, due to large higher torque
terminal screws and cables fitted with crimps
Option to provide high
integrity solutions with
standard Dual RCD 16 and
22 module consumer units
• Fast release of DIN
rail using key holes
• Fast fit to wall, using keyholes
and integral spirit level
• One height floating busbar, can be cut to
any length for any consumer unit configuration
• Terminal and busbar design enables installer
to select a wide combination of protected or
unprotected circuits
03
Circuit Protection
For 17th Edition Compliant Installations
Since 1st July 2008 the 17th Edition Wiring Regulations has
required the installation of ‘Additional Protection’, by means
of 30mA RCDs on many circuits which previously may not
have needed protection by RCDs.
It is important that a single fault does not inconvenience or
cause increased danger for others, e.g. lights going out if
fault on a socket. Therefore, the use of more than one RCD
is required. Different types and sizes of property, will require
different design considerations, and different equipment can
enable some circuits to be grouped together on one RCD.
Whereas other circuits may require a dedicated supply,
e.g. smoke alarms and warden call.
British Standard and IEE Regulations are subject to change,
please always refer to the latest standards for all types of
electrical design and installation work.
BG offers a variety of circuit protection solutions, that will
help the designer and installer to comply and meet these
new regulations.
The following areas require additional protection by an RCD not exceeding 30mA:i)
-
Socket Outlets (section 411.3.3)
All sockets up to 20A.
All mobile equipment up to 32A, used outdoors.
Exceptions are socket outlets under supervision of someone skilled/instructing, and labelled
socket, e.g. ‘Freezer’.
ii) Cables buried in walls (section 522)
- All cables concealed in a wall/partition less than 50mm depth, and without earthed mechanical
protection, e.g. earthed metal conduit.
iii) Location containing a bath or a shower ( section 701.411.3.3)
- All circuits within these locations must have additional protection by an RCD.
iv) Installations to be divided (section 314)
- All circuits of an installation should not be connected to a single RCD. This avoids hazards and
minimises inconvenience to others by reducing unwanted tripping.
04
Circuit Protection
BG Consumer Unit Options
Possible consumer unit options to support
17th Edition Wiring Regulations compliance.
Note:- The following diagrams use a 16 module consumer unit
to demonstrate the available options.
Module 22
Module 16
BO
BO
C
R
C
BO
R
C
BO
C
BO
R
R
C
B
RCD1
M
E
C
M
E
SP
AR
B
SP
AR
B
C
M
B
C
C
B
M
RCD
RCD2
M
B
C
C
B
M
M
B
B
C
B
C
M
B
C
B
C
M
M
M
C
B
C
B
B
M
M
C
M
C
M
SP
AR
E
SP
AR
E
C
BO
R
C
BO
R
R
C
BO
BO
C
R
C
BO
R
BO
C
R
R
C
BO
C
R
C
E
R
E
SP
AR
E
SP
AR
SP
AR
SP
AR
E
BO
Module 12
1. Main Switch
MAIN
SWITCH
•
Main switch plus the use of RCBOs
for every circuit
2. Split Load
MAIN
SWITCH
•
Some circuits using MCBs protected by an RCD
•
Other independent circuits using RCBOs
3. Dual RCD
MAIN
SWITCH
•
Some circuits using MCBs protected by an RCD1
•
Some circuits using MCBs protected by an RCD2
BO
C
R
C
R
RCD1
SP
AR
E
B
C
M
B
C
M
E
RCD2
SP
AR
C
B
M
C
B
M
C
B
M
SP
AR
E
BO
4. High Integrity Dual RCD
MAIN
SWITCH
•
Some circuits using MCBs protected by an RCD1
•
Some circuits using MCBs protected by an RCD2
•
Other independent circuits using RCBOs
* Only suitable for 22 module
consumer unit
BO
R
C
R
C
RCD1
SP
AR
E
B
C
M
B
C
M
B
C
M
E
RCD2
SP
AR
C
B
M
C
B
M
E
RCD3
SP
AR
C
B
M
C
B
M
C
B
M
SP
AR
E
BO
Standard Dual RCD consumer unit offers
option of High Integrity Dual RCD
as standard.
MAIN
SWITCH
5. High Integrity Triple RCD*
•
Some circuits using MCBs protected by an RCD1
•
Some circuits using MCBs protected by an RCD2
•
Some circuits using MCBs protected by an RCD3
•
Other independent circuits using RCBOs
05
Circuit Protection
MAIN SWITCH CONSUMER UNITS
Catalogue Number
Insulated Metal
Description
Modules
CUSW10 CUSW10M
CUSW14 CUSW14M
CUSW20 CUSW20M
10 way with 100A switch
14 way with 100A switch
20 way with 100A switch
Switch
12
16
22
Max No. Ways
10
14
20
Max Total
-
10
14
20
Metalclad units have 1.2mm steel base with insulated plastic cover and visor with 20
and 32mm knockouts
Insulated units supplied with 40x16, 25x16, 16x16mm cutouts
Each consumer unit supplied with two cover blanks
CUSW14
SPLIT LOAD CONSUMER UNITS
Catalogue Number
Insulated Metal
CUSL808
Description
Modules
#
8 way with 100A switch
and 80A 30mA RCD
CUSL8012 CUSL8012M 12 way with 100A switch
and 80A 30mA RCD
#
CUSL8018 CUSL8018M 18 way with 100A switch
and 80A 30mA RCD
CUSL808M
#
Switch
Max No. Ways
Max Total
RCD
12
5
6
8
16
9
9
12
22
10
11
18
CUSL8012
# denotes supplied as kit
Each consumer unit supplied with two cover blanks
DUAL RCD CONSUMER UNITS
Catalogue Number
Insulated Metal
Description
CUD6610 CUD6610M
10 way with 100A switch
and 2 × 63A 30mA RCD
#
CUD8610 CUD8610M 10 way with 100A switch
and 80 and 63A 30mA RCD
#
CUDP16610 CUDP16610M 10 way with 100A switch,
2×63A 30mA RCD
and cw 10 × MCBs*
CUD6616 CUD6616M 16 way with 100A switch
and 2 × 63A 30mA RCD
#
CUD8616 CUD8616M 16 way with 100A switch
and 80 and 63A 30mA RCD
#
CUDP16616 CUDP16616M 16 way with 100A switch,
2×63A 30mA RCD
and cw 12 × MCBs**
Modules
Switch
Max No. Ways
RCD1
RCD2
Max Total
16
5
7
7
10
16
5
7
7
10
16
5
7
7
10
22
up to 9
up to 13
up to 11
16
22
up to 9
up to 13
up to 11
16
22
up to 9
up to 13
up to 11
16
CUD6610
* Includes 40A, 4x32A, 2x16A and 3x6A MCBs
** Includes 50A, 40A, 4x32A, 2x16A, 10A and 3x6A MCBs
# denotes supplied as kit
Each consumer unit supplied with two cover blanks
Dual RCD units supplied with optional High Integrity as standard
Terminal and busbar design provide maximum flexibility for combination of protected
or unprotected circuits
ENCLOSURES
Catalogue Number
Description
CUE4
CUE4M
CUE5W
CUGAR1
CUSHOW1
Insulated - IP30
Metal - IP30
Weatherproof - IP55
Garage Kit - IP55, 40A 30mA RCD, 6+32A MCB
Shower Kit - IP55, 63A 30mA RCD, 50A MCB
Modules
4
4
5
5
5
CUE5W
CUE4
Choice of insulated and metal enclosures
Enclosures either IP30 or IP55 (weatherproof)
Available in 4 or 5 modules
Enclosure kits supplied complete with devices, DIN rail, neutral cable, neutral & earth terminals, and busbar
All BG devices can be used with enclosures, except RCBOs
Manufactured and tested to EN 60439
For further technical information, or installation advice please visit our website
www.bgelectrical.co.uk
06
CUE4M
Circuit Protection
MAIN SWITCH (ISOLATOR)
Catalogue
Number
Description
Rating
Modules
Carton
Qty
CUSW100
Double Pole
100A
2
5
Rating
Modules
Carton
Qty
6A
10A
16A
20A
32A
40A
50A
1
1
1
1
1
1
1
10
10
10
10
10
10
10
Rating
Modules
Carton
Qty
6A
10A
16A
20A
32A
40A
1
1
1
1
1
1
5
5
5
5
5
5
Rating
Modules
Carton
Qty
40A 30mA
63A 30mA
80A 30mA
80A 100mA
80A 100mA
2
2
2
2
2
5
5
5
5
5
Modules
Carton
Qty
1
2
2
1
3
2
2
5
5
5
5
5
5
5
Positive contact status indication
CUSW100
MCBs
CUMB6
Catalogue Number
Type B
Type C
Description
CUMB6
CUMB10
CUMB16
CUMB20
CUMB32
CUMB40
CUMB50
Single Pole, Breaking Capacity 6kA
Single Pole, Breaking Capacity 6kA
Single Pole, Breaking Capacity 6kA
Single Pole, Breaking Capacity 6kA
Single Pole, Breaking Capacity 6kA
Single Pole, Breaking Capacity 6kA
Single Pole, Breaking Capacity 6kA
CUMC6
CUMC10
CUMC16
CUMC20
CUMC32
CUMC40
CUMC50
Positive contact status indication
RCBOs
CURB32
Catalogue
Number
Description
CURB6
CURB10
CURB16
CURB20
CURB32
CURB40
Single Pole, Type B, Breaking Capacity 6kA
Single Pole, Type B, Breaking Capacity 6kA
Single Pole, Type B, Breaking Capacity 6kA
Single Pole, Type B, Breaking Capacity 6kA
Single Pole, Type B, Breaking Capacity 6kA
Single Pole, Type B, Breaking Capacity 6kA
Positive contact status indication
RCDs
CUR6330
Catalogue
Number
Description
CUR4030
CUR6330
CUR8030
CUR80100
CUR80100TD
Double Pole, Type AC
Double Pole, Type AC
Double Pole, Type AC
Double Pole, Type AC
Double Pole, Type AC, Time Delayed
Positive contact status indication
CONTROL DEVICES
CUC20
CUTS5
CUTS10
Catalogue
Number
Description
CUC20
CUC40
CUB1
CUTS1
CUTS5
CUTS10
CUTS11
Contactor 20A Double Pole
Contactor 40A Double Pole
Bell Transformer
Time Delay Switch, 1-7 mins
Timer Analogue 24 Hr
Timer Digital 1 Channel
Timer Digital 2 Channels
ACCESSORIES
Catalogue
Number
Description
Carton
Qty
CUA01
CUA02
CUA03
CUA05
CUA05
CUA10
CUA11
Consumer Unit Cover Blanks (pack of 10)
Busbar 21 Way
Busbar Shield 21 way
Cable Kit includes neutral and live cables, terminal bar,
fixing clip and spare labels
Device Lock
Spare label sheets (Pack of 5)
10
10
10
5
CUA05
10
10
All devices are capable of being locked in ON or OFF position using device lock (CUA10) and padlock
Cable kit enables consumer unit upgrade from main switch to Split load, or Split Load to Dual RCD,
or Dual RCD to Triple RCD (22 module unit only)
07
Circuit Protection
Standards
Product
Consumer Unit
Main Switch
MCB
RCBO
Standard
BS EN 60439-3
EN/IEC 60947-3
EN/IEC 60898
EN/IEC 61009-1
Product
RCD
Enclosure
Contactor
Bell Transformer
Standard
EN/IEC 61008
EN/IEC 60439
EN/IEC 60947, 61095
EN/IEC 61558-1
Dimensions
Insulated (A)
317mm
389mm
497mm
Metal (A)
317mm
389mm
497mm
All
Insulated
Terminals
Device
Switch
MCB
RCD
RCBO
2
Capacity mm
Max Torque Nm
35
2.5
2
2
16 (32-50A 25mm )
35
2.5 (80A 3.5Nm)
2
2
16 (32-40A 25mm )
A
Metal
234mm
Consumer Unit
12 Modules
16 Modules
22 Modules
234mm
Devices – Pole pitch 18mm
117mm
Cut Outs and Knock Outs
Range
Insulated 12 Module
Insulated 16 Module
Insulated 22 Module
Metal 12 Module
Metal 16 Module
Metal 22 Module
Top & Bottom Face
4 off - 40, 25, 16 x 16mm
6 off - 40, 25, 16 x 16mm
8 off - 40, 25, 16 x 16mm
7 x 20mm, 1 x 32mm
8 x 20mm, 2 x 32mm
10 x 20mm, 2 x 32mm
Consumer Unit
Max current rating 100A
Operating Voltage 230V
Short circuit withstand 16kA rms
Metal CU base manufactured from 1.2mm steel
RCD
Type AC
Tripping Time : 1 x In �100mS
<
_
5 x In 40mS
<
_
RCBO
Type AC
Poles: 1 (1P+N)
Each Side
40, 25, 16 x 16mm
40, 25, 16 x 16mm
40, 25, 16 x 16mm
1 x 32mm
1 x 32mm
1 x 32mm
Base
50mm x 50mm x 3
50mm x 50mm x 3
50mm x 50mm x 3
50mm x 50mm x 3
50mm x 50mm x 4
50mm x 50mm x 5
Contactors
Poles: 2 (1+N), NO (Normally Open)
Bell Transformer
- Output voltage 4,6,8,12,16, 24V
- Rated output 8VA
- Consumption 1.15W
MCB
Breaking capacity 6000A
Type B operating 3-5 x In
Type C operating 5-10 x In
• Positive contact status indication on Switch, MCB, RCD & RCBO provided by green indicator to show contacts are open
122mm