4-6 York Street, London.
Electrical design and installation case study.
Chalfont Electrical Services were appointed to fully design, install and commission all electrical services at 4-6 York Street based on utilising much of the existing power and containment. The address comprises of two grand and spacious buildings combined into one spread across 6 storeys including the basement, ground, first, mezzanine, third and fourth floors. The aim of the project was to create a contemporary office space for businesses to operate from in central London. The full electrical design was completed by one of our lead engineers who has over 30 years of industry experience and has cultivated the art of electrical design for a vast array of residential, commercial and medical projects across the UK and overseas. The design included lighting systems and controls, power to the break areas, electric underfloor heating and panel heaters, security systems and access control, fire alarm and disabled refuge alarms.
The aim of this project was to create a contemporary office space, and this is at the forefront of consideration with this lighting design. Our designs are created initially by marking drawings by hand and eventually transferred onto a PDF document using CAD software. The design includes a variety of pendants, wall lights and downlights carefully selected and designated them to suit each area of the commercial space.

The snapshot you can see is from the mezzanine level of the building. The top three fittings on this drawing represent the three large decorative ‘Hacel Explora Halo’ pendants. These were chosen to accentuate the bright and open feel the mezzanine level already created. The pendants are controlled by a mains PIR which offers both convenience and energy efficiency.

Here you can see the ‘Trilux LC60’ Linear LED fittings. As the self-contained office suites are a variety or lengths and arrangements dependant on the floor and area of the building, these fittings were a perfect choice for this project as they can be ordered to bespoke lengths. We chose black as the outer shell which contrasts well with the white and original concrete ceilings but works intrinsically with the black finishes on the doors/handles, glass partitions and kitchen areas. These fittings are controlled by mains PIR to maximise energy efficiency. Containment for lighting controls and fire alarm was galvanised steel conduit in keeping with the industrial feel of the original concrete ceilings.

For the breakout areas we selected lighting that emits warmer temperatures to create a more relaxed atmosphere – away from the busy office space. The lamp selection was bright enough and contrasted in its surroundings which alleviates the need for any additional lighting, providing a cost-effective solution for illuminating the area.

We selected this decorative pendant from Enamel Shades for each of the breakout areas. The pendant was also in matt black which matches the kitchen’s modern design.

As per direction of the electrical specification we created a small power layout and design for the breakout and bathroom areas of the building. The design includes power outlets, appliance supply outlets and fused connection units. Chalfont also designed and installed the electric under floor heating in the bathroom areas and the electric panel heaters across all office areas.

Snapshot of Ground Floor small power design:

Snapshot of mezzanine floor small power design:

All power outlets in the breakout areas were selected as black which match the worktops and carpentry kitchen cabinets for a stylish and contemporary finish. For the power outlets we used Hamilton – Hartland G2 Range in Black, as shown in the images above. All outlets that were installed in back of house areas are white – MK Logic.

Note on mains power: To counter the cost of UKPN and meter shipper costs, we installed software and monitoring equipment to record energy consumption on all floors that can be translated to kilowatts per hour at the landlords chosen tariff for simple and easy to use power consumption cost management for the landlord. This also provides an opportunity for energy monitoring and efficiency on all florrs.

Snapshot – Initial hand marked access control drawing:

For confidentially purposes we will include limited information on specific aspects of this area of the design. Chalfont completed a full security system design and install for the property, which included but not limited to the CCTV cameras and panel, Intruder alarm presence detectors, panels, keypads and more. The access control system design included Paxton Net2, this gives all office tenants access to their suite and main doors. In each office suite, a BPT video monitor is installed and linked to the new multi-button door panel, the monitor is wired to go through the CAT 6 network cabling on each floor so can be positioned wherever there is a CAT 6 port.  

As per direction of the electrical specification we created a small power layout and design for the breakout and bathroom areas of the building. The design includes power outlets, appliance supply outlets and fused connection units. Chalfont also designed and installed the electric under floor heating in the bathroom areas and the electric panel heaters across all office areas.

Snapshot of fire alarm design for mezzanine floor:

Snapshot of fire alarm design for Ground Floor:

Part of our design included a disabled refuge alarm system. The main panel was mounted adjacent to the fire alarm panel with outstations on all floors except ground. This system also included a link to WC alarms on the lower ground and first floors. The system was installed in accordance with BS 5839-9.

Snapshot – Initial hand marked basic design layout for disabled WC alarm:

Snapshot – Initial hand marked basic schematic for disabled refuge alarm: