St Mary Redcliffe Project 450 RIBA 2 Stage End Report

10 Electrical Services Strategy
ELECTRICAL DISTRIBUTION
10.1.3.1 Small power systems
Small power systems will consist of socket outlets, isolators and switched connection units. A consistent finish for outlets
will be used throughout the facility. It is proposed that brushed chrome outlets with white inserts are be used.
The main panel board within the electrical plantroom will distribute the power throughout the building.
Small power outlets in process and plant areas will be of robust quality and surface mounted metal clad.
Internal Artificial lighting
10.1.4.1 General
Energy monitoring and sub-metering
Energy sub-metering will be provided to facilitate effective monitoring of energy consumption as part of an overall site
energy management strategy.
All sub-meters will be linked to the BMS system using mod bus to facilitate data collection and
monitoring on site. This system will assist the facilities management staff to advise on areas where
power consumption appears excessive, assist in fault monitoring, manage power quality, and
control the power network efficiently.
Sub-meters will generally be mounted within individual distribution boards and will be of the
Smart Meter type with pulsed output.
It is proposed that multi-functional digital type sub-meters are provided on the main switch-panels to monitor kWh, kVA,
Volts, Amps, PF and max demand. In addition to meet the requirements set out within Building Regulations Part L2A each
general distribution board will be split type providing the capability to measure small power and lighting loads
independently.
The lighting system throughout the facility will be designed for maximum comfort and energy efficiency. Best Practice in
lighting design will be achieved by reference to the Chartered Institution of Building Services Engineers’ (CIBSE)
publication “Code for Lighting” (2012); and associated CIBSE Lighting Guides.
All luminaires will be supplied from reputable approved manufacturers with the capability to provide support within the
surrounding area.
LED light sources are affordable and offer very viable paybacks compared to obsolete technologies such as fluorescent or
incandescent lighting. The quality of light is also superior therefore LED lighting is proposed to be utilised for this project
for internal and external areas.
Robust impact resistant luminaires will be specified for areas prone to damage such as plant and external areas.
The lighting types will be kept to minimum to ease maintenance and limit the quantity of spare parts. Lighting controls
will generally be automatic with a combination of DALI Presence Detection and Daylight dimming.
To prevent the ceiling appearing dark, the ceiling average illuminance from both the direct/indirect and reflected
component should be at a minimum of 20% of the average horizontal Illuminance. In large spaces with ceiling heights of
2.4m or less this may be difficult to achieve and in such circumstances the proportion of light on the ceiling should be as
high as is practicable.
1563.R1 – Stage 2 report Page 19 of 29