Asset Engineering Specifications
Working knowledge of low-voltage switchboard standards, intelligent MCC functional architectures, telemetry signal hierarchies, and field instrumentation tagging conventions.

Chartered EICA / MEICA Design · UK Water Sector
FZAI Ltd is an independent engineering consultancy powered by a dedicated team of Chartered Engineers (CEng MIET) and principal MEICA design specialists. We provide end-to-end Electrical, Instrumentation, Control & Automation engineering packages and technical governance exclusively for the UK municipal water and wastewater sector.
Trusted by Leading Engineering Consultancies & Delivery Partners
Standards & Compliance
Our Chartered Engineering team possesses in-depth, working familiarity with the technical governance, asset design guides, and engineering specifications governing municipal water infrastructure. We ensure every deliverable is fully compliant prior to submission.
Working knowledge of low-voltage switchboard standards, intelligent MCC functional architectures, telemetry signal hierarchies, and field instrumentation tagging conventions.
Standardized M&E templates, cable containment schedules, draw pit sizing, and duct management guidelines.
Potable water chemical dosing specifications, automated fail-safe safety interlocking, and framework electrical distribution standards.
Deliverables are verified against the governing national and industry specifications prior to submission.
Water Industry Mechanical and Electrical Specifications: full compliance across MCCs, low-voltage switchboards, kiosks, and analytical instrumentation.
IET Wiring Regulations, 18th Edition: electrical safety, earthing, cable sizing, protection coordination.
Low-voltage switchgear and controlgear assembly design and verification.
Services
Design and technical governance services delivered under Chartered Engineer oversight for the UK municipal water and wastewater sector.
Low-voltage distribution design modelled in the Trimble suite: cable sizing, fault level and voltage drop verification, and protective device discrimination, issued as a coordinated calculation and drawing package.
Discuss this scopeChartered Engineer (CEng MIET) oversight applied directly to the design package — technical governance, assurance and review carried out by the same senior engineers producing the deliverables.
Discuss this scopeToolset
We combine deep water process insight with rigorous computer-aided engineering tools. Our team has recognized expert-level mastery in:
ProDesign 25 / Amtech, SingleCable Pro, Trimble Electrical Designer 2D
Low-voltage network modeling, cable sizing, fault level calculations (kA), voltage drop verification, and protective device discrimination studies.
Expert-Level MasteryDesign authoring & drawing production
Single Line Diagrams (SLDs), Block Cable Diagrams (BCDs), MCC General Arrangements (GAs), panel layouts, and schematic termination drawings.
Expert-Level MasteryWord, Excel, PowerPoint
Engineering data manipulation, automated master load schedules, valve and instrument schedules, calculation sheets, and executive technical reporting.
Expert-Level MasteryControl architecture documentation
Process architecture mapping, control philosophy flowcharts, network topology diagrams, and telemetry interface schematics.
Expert-Level MasteryGallery
Featured on-site engineering deployments across active municipal water and wastewater treatment facilities.
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Placeholder image · pending client assetCase Studies
Our team has delivered technical leadership and design packages across multimillion-pound schemes in the UK water sector.
Framework
Municipal wastewater capital delivery — advanced treatment upgrade
Key outcome
A coordinated, compliant EICA design package accepted for construction, with the new treatment stream electrically integrated into the existing works and interface risk resolved at design stage rather than on site.
Challenge
Introduction of a Nereda® aerobic granular sludge treatment stream onto an operational sewage treatment works required a new electrical distribution and control architecture to be integrated alongside live assets, without interruption to consented discharge, and with vendor control equipment interfacing into the site-wide telemetry hierarchy.
Solution
Delivered the full EICA design package: low-voltage distribution modelling and cable sizing in the Trimble suite, fault level and discrimination studies, Single Line Diagrams, Block Cable Diagrams and MCC General Arrangements, together with instrument and valve schedules and a control philosophy defining the process interlocking between the Nereda® stream and existing plant. Vendor control panel submissions were technically reviewed against WIMES, BS 7671 and BS EN 61439 prior to acceptance.
Framework
Tier 1 contractor capital scheme — wastewater treatment upgrade
Key outcome
Design deliverables issued to programme with compliance to WIMES and BS 7671 demonstrated in the calculation set, enabling procurement of switchgear and MCCs without redesign.
Challenge
A major capital upgrade to an operational wastewater treatment works required extensive replacement and extension of the electrical distribution, motor control and instrumentation infrastructure while maintaining treatment throughput, with tight tender and construction milestones placing the design package on the programme critical path.
Solution
Provided senior-led detailed EICA design: incoming supply and LV distribution assessment, Trimble ProDesign network modelling with voltage drop and fault level verification, MCC functional specification and General Arrangements, cable containment and draw pit schedules, field instrumentation tagging and termination schematics, plus technical query resolution through construction.
Framework
Clean water framework programme — multi-site dosing and disinfection upgrades
Key outcome
A consistent, framework-compliant design set delivered across the programme, reducing per-site design effort and simplifying vendor procurement, review and site acceptance.
Challenge
Seventeen potable water sites required chemical dosing and disinfection plant upgrades under a common framework, demanding consistency of design, standardised documentation and repeatable safety interlocking across a geographically distributed asset base, each site with differing existing electrical infrastructure.
Solution
Developed a standardised EICA design template applied across all seventeen sites: common SLD and BCD conventions, standardised dosing kiosk and local control panel specifications, automated fail-safe safety interlocking to the client's potable water chemical dosing specifications, and master load, instrument and valve schedules maintained as controlled documents per site.
Framework
£6M sewage treatment works refurbishment
Key outcome
Refurbishment design delivered for a £6M scheme with obsolete assets replaced by compliant, verified equipment and a documented, staged changeover strategy for the operational works.
Challenge
Refurbishment of an ageing sewage treatment works required replacement of obsolete switchgear, motor control equipment and field instrumentation, with limited and partly inaccurate existing record information, and staged construction around continued operation of the works.
Solution
Carried out site load assessment and validation of existing infrastructure, followed by full detailed design: LV distribution modelling and protective device coordination, Form 4 switchboard and MCC specification to BS EN 61439, containment and cabling design, instrumentation schedules, and staged changeover documentation supporting phased commissioning.
Framework
Clean water treatment works infrastructure upgrade
Key outcome
Upgraded process plant integrated into the existing electrical infrastructure with verified capacity, documented protection coordination and fail-safe control demonstrated in the design submission.
Challenge
Upgrade of clean water treatment infrastructure required additional process plant to be powered and controlled from constrained existing electrical infrastructure, with potable water compliance and fail-safe operation as non-negotiable design conditions.
Solution
Delivered feasibility-level capacity assessment followed by detailed EICA design: revised LV distribution and cable calculations in the Trimble suite, MCC and local control panel specification, instrumentation and actuated valve schedules, and a control philosophy defining fail-safe interlocking and telemetry signal hierarchy for the upgraded plant.
Scope Selector
Select the stage that matches your scheme and we will route your enquiry directly to a Chartered Principal Engineer.
Contact
Connect directly with our Chartered Principal Engineers to discuss your scheme requirements, tender timelines, or technical specifications.
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