Explore the features of the Consumer Units range:Lockable cover option available Easy access of cables via knockouts, in sides top and bottom, plus additional rear entry knockouts Spirit level, to enable quick installation Backed-out and retained terminal screws, prevents loss of screws, and saves on installation time
The BS 7671 : 2008 17th Edition IET Wiring Regulations Amendment 3 :2015, Regulation 421.1.201 prescribe that within Domestic (household) premises, consumer units and associated switchgear assemblies (enclosures), are manufactured from non combustible material or enclosed in a non combustible cabinet/enclosure and comply with product standard BS EN 61439-3.
The purpose of the new regulations is to reduce the risk and limit the spread of fire from consumer units due to faulty components or poorly installed components.
The new range of BG ‘all metal’ consumer units and enclosures meet this requirement.
Domestic (household) premises include houses, bungalows, flats, apartments, student lets, sheltered accommodation, static homes, home offices, and attached garages etc. Other types of property that are classed as commercial, and you may wish to consider using all metal consumer units for are :- Nursing Homes, guest Houses, bed and breakfast houses and hostels, etc.
BG ‘all metal’ consumer units, consist of a metal base, cover and visor and are manufactured from steel – a non-combustible material.
Regulation 421.1.201 requires all designs for new installations from July 1st 2015 to be to the new standard, between July 1st and end of December 2105 installation of ‘all metal’ consumer units is optional unless designed after July 1st, from Jan 1st 2016 ‘all metal’ consumer units must be installed in domestic premises unless designed before July 1st 2015, in which case choice of metal or plastic is optional.
Requirements for Additional Protection (30mA RCD)
The 17th Edition Wiring Regulations also has the requirement for additional protection from 30mA RCDs, summarised below.
17th Edition BG Consumer Unit Options
Possible consumer unit options to support 17th Edition Wiring Regulations Compliance
Note:- The following diagrams use a 12 module consumer unit to demonstrate the available options
High Integrity Dual RCD
Standard Dual RCD consumer unit offers option of High Integrity Dual RCD as standard
Note: High Integrity Triple RCD is achieved using only the 22 module Consumer Unit
New all metal consumer units comply with 17th Edition Wiring Regulations BS 7671 Amendment 3'
|Consumer Unit||BS EN 61439-3|
|Main Switch||EN/IEC 60947-3|
|Contactor||EN/IEC 60947, 61095|
Devices - Pole pitch 18mm
|Device||Capacity mm2||Max Torque Nm|
*Note 8 & 12 module ‘Tall’ variant, height is 261mm
Cut Outs and Knockouts
|Range||Top & Bottom Face||Sides||Base|
|Metal 8 Module||6 x ø20mm, 1 x ø32mm||1 x ø32mm||1 x ø50 x 100mm|
|Metal 12 Module||8 x ø20mm, 1 x ø32mm||1 x ø32mm||1 x ø50 x 100mm|
|Metal 16 Module||9 x ø20mm, 2 x ø32mm||1 x ø32mm||2 x ø50mm, 1 x ø50 x 100mm|
|Metal 19 Module||11 x ø20mm, 2 x ø32mm||1 x ø32mm||2 x ø50mm, 1 x ø50 x 100mm|
|Metal 22 Module||13 x ø20mm, 2 x ø32mm||1 x ø32mm||3 x ø50 x 100mm|
|Insulated 8 Module||4 off - 40, 25 x 16mm||40, 25 x 16mm||3 off - 50, 30 x 40mm|
|Insulated 12 Module||6 off - 40, 25 x 16mm||40, 25 x 16mm||4 off - 50, 30 x 50mm|
|Insulated 12 Module Tall||6 off - 40, 25 x 16mm||40, 25 x 16mm, 1 x Ø25 or Ø20mm||4 off - 50, 30 x 50mm|
|Insulated 16 Module||8 off - 40, 25 x 16mm||40, 25 x 16mm||2 off 50,30 x 50, 4 off 50,30 x 40mm|
|Insulated 19 Module||9 off - 40, 25 x 16mm||40, 25 x 16mm||6 off - 50, 30 x 50mm|
|Insulated 22 Module||10 off - 40, 25 x 16mm||40, 25 x 16mm||2 off 50,30 x 50, 6 off 50,30 x 40mm|
• Positive contact status indication on Switch, MCB, RCD & RCBO provided by green indicator to show contacts are open
Consumer units for use in domestic household premises
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