8.7.4-1
Connections to external plant or equipment
Component Information
- Code:
- 8.7.4-1
- Sequence:
- 1
- Unit:
- nr
- Sub-Element:
- 8.7.4 - 4 Electricity distribution to external plant and equipment
Connections to external plant or equipment
details to be stated
Component Statistics
Measurement Rules
Included Items
Excluded Items
Measurement Rules (6)
Where components are to be enumerated, the number of components is to be stated.
The length of linear components measured is their extreme length, over all obstructions.
Other cost-significant components are to be described and identified separately. Such components are to be measured by area (m2) or linear measurement (m), or enumerated (nr) separately in accordance with the rules of measurement for this sub-element.
Work outside the curtilage of the site is to be described and identified separately
Where the contractor is only responsible for designing specific elements and/or components of the building project (i.e. not the entire building project), contractor-designed work is to be described and identified separately.
The percentage additions for testing and commissioning are to be applied to the total cost of the items comprising the sub-element. A single combined percentage addition can be applied to cover the costs of both testing and commissioning.
Included Items (15)
General-purpose LV power installations for external plant and equipment, including cables, excavating and backfilling trenches, etc.
LV switchgear and distribution boards, where not included as part of the submains distribution.
Uninterruptible power supply (UPS) installations, etc., specific to external plant and equipment.
Cables and wiring, including support components from subdistribution boards to fuse connection units, etc.
Conduits and cable trunking, including all fittings and support components.
Earthing and bonding components.
Constructing draw pits, including access covers.
Marker tape, cover tiles and other special protection for electrical cables.
Fuse connection units and other outlet accessories.
Final connections to equipment (e.g. to pumping stations and ejector stations).
Separate power installations for specialist mechanical and electrical equipment (e.g. for sewage treatment plant).
Final connections to specialist mechanical and electrical equipment where not carried out by the equipment installer.
Sundry items.
Testing and commissioning
Where works are to be carried out by a subcontractor, the subcontractor’s preliminaries, design fees, risk allowance, overheads and profit, with allowance for these to be made within unit rate applied to element or component
Excluded Items (7)
General-purpose power installations within building (included in sub-element 5.8.2).
General-purpose power installations for external water features, etc. (included in sub-element 8.5.2).
General-purpose power installations for external security systems (included in sub-element 8.7.8).
General-purpose power installations for external illumination systems (included in sub-element 8.7.9).
Final connections to specialist mechanical and electrical equipment where carried out by the equipment installer.
Building management systems and other control systems (included in sub-element 5.12.3).
Builder’s work in connection with external services (included in sub-element 8.7.11).
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