Prefabricated Wiring System Provides 75 Percent Time Saving For London Offices

Burgin Contracting is achieving a 75 percent time saving on an electrical installation for prestigious central London offices by using Hager’s prefabricated wiring system, Klik.system.

The installation at 6-7 New Bridge Street in Central London has used klik.system from the distribution boards right through to final luminaires and lighting control.  The prefabricated wiring system also provides power to fan coil units throughout the seven-storey building.

Says Andy Collinge, electrical operations manager for Burgin:  “The system has saved us significant time in the first fix because there are fewer hard wired connections to make.  This labour saving translates into a cost saving on the job making us more competitive in the tender.

“In addition there will be significant savings when it comes to inspection and testing since the system has been designed and manufactured in a factory controlled environment, so it has already been pretested.  This in turn means that there should be less fault finding before we hand over the completed job and then less snagging afterwards.”

Hager has provided all of the sub distribution, which includes 11 TP&N distribution boards; three of these boards are for the landlord’s supplies and 8 for tenants.  The dual distribution boards are all MID metered for both lighting and power to meet Part L2 and with MID approval can be used for billing tenants if the landlord chooses to do so.

The multi core home run cables from these boards plug into area distribution boards (ADBs) in the ceiling void, which in turn plug into lighting marshalling boxes (LMBs).  The luminaires then plug into the marshalling boxes as do the occupancy sensors that provide the lighting control.
The occupancy sensors switch the lighting on in response to motion and then switch them off after a time out period when there is no further motion.  They also contain a photocell so that the luminaires switch off if natural light levels are above a set level.

To ensure that the prefabricated wiring system complies with all of the relevant standards and regulations, Hager designed the system for Burgin using its bespoke software package.  This produced a fully calculated design, which includes drawings, electrical calculations, test information and delivery schedules.

Says Collinge:  “All of the products were delivered complete with drawings that detail exactly what leads should be used where.  All of the cables are labelled, so there was no problem in identifying what cables are used for which connections, so human error was minimised.”

Says Steve York, product manager for Klik.system at Hager:  “As a manufacturer who supplies distribution boards, a lighting installation and control system and wiring accessories, we can provide all of the elements needed for a prefabricated wiring system.  This minimises the problems that a contractor might have on site in liaising with several manufacturers, while still giving them all of the time saving benefits they would expect from a prefabricated wiring system.”

“In addition our bespoke Klik.system software does all of the necessary calculations, such as voltage drop, earth fault loop impedance and cable sizing, that are needed.  This validates the design and protects the contractor in design and build operations, in case there is an issue later on.”

Tags: Klik, lighting digest

busbar,lighting industry,e-lec.org