Electrical Engineering

Electrical Systems

Well-planned electrical systems coordinated with automation, power, and site infrastructure for cleaner project delivery.

Service visual

Electrical Systems

Benefits

Design & Distribution
Load schedules, single-line diagrams, and DB layouts prepared before a single cable is pulled
Phase balancing across all distribution points, reduces energy waste and prevents equipment damage
Circuit segregation from source—lighting, power, HVAC, smart systems, and critical loads on independent circuits
Reliability & Protection
Automatic Transfer Switch (ATS) — seamless, zero-intervention PHCN-to-generator handover
MDB and sub-distribution boards sized correctly for today's load and tomorrow's growth
Surge protection and overcurrent devices at every distribution level
Earthing and bonding installed and tested to Nigerian and international standards
Lightning protection where site exposure and building height require it
Integration & Compliance
Fully coordinated with ELV, smart automation, solar, and generator systems—no conflicts between trades
Energy metering at MDB, sub-DB, and tenant levels—visibility over every circuit and its cost
Drawings, test results, and installation certificates delivered at handover—not chased afterwards

Use cases

Commercial office buildings — full electrical infrastructure from design to commissioning
Hotels and hospitality properties — guest room, back-of-house, kitchen, and common area systems
Industrial facilities, factories, and warehouses—heavy load circuits, motor starters, three-phase distribution
High-end residential estates and luxury homes—coordinated with smart and solar systems
Healthcare facilities—clinical and non-clinical power segregation, UPS-critical circuits, compliance documentation
Existing buildings upgrading overloaded, non-compliant, or ageing electrical infrastructure
Fit-out electrical works — tenant floors, office fit-outs, and hotel room reconfigurations

What Daayra delivers

Design
Electrical load schedule—all loads itemised, phased, and totalled for accurate sizing
Single-line diagram — full distribution hierarchy from utility intake to final circuits
Distribution board schedules — circuit descriptions, breaker ratings, and load allocations
Earthing and lightning protection design where required
Distribution & Wiring
Main Distribution Board (MDB) — supply, installation, busbar, metering, and main breaker
Sub-distribution boards — floor and zone boards with MCBs, RCDs, and surge protection devices
Final circuit wiring — lighting, sockets, HVAC isolators, and equipment connection points
Cable containment — conduit, trunking, cable tray, and ladder rack throughout
Three-phase and single-phase wiring to all specified load points
Busbar chambers and rising mains for multi-storey and mixed-use buildings
Power & Changeover
PHCN intake and metering arrangement
Automatic Transfer Switch (ATS) — mains-to-generator changeover with configurable delay and back-transfer logic
Manual changeover for smaller installations or backup override
Generator connection panels and supply cabling
UPS circuits for servers, security, fire alarm, and life safety loads
Earthing & Protection
Earth electrode installation with resistance measurement and test links
Equipotential bonding — pipework, structural steel, containment, and equipment frames
Surge protection devices at MDB, SDB, and sensitive equipment positions
RCD and RCBO protection on all final circuits as required
Lightning protection air terminals and conductor installation where designed
Lighting
Internal lighting — ceiling, recessed, surface, track, and wall positions
Emergency lighting—self-contained and central battery systems for means of escape
External lighting — car park, perimeter, landscape, and facade positions
Street and estate road lighting where required
Smart lighting wiring — dimmer circuits, sensor positions, and control panel connections
Testing & Handover
Insulation resistance, earth fault loop impedance, and RCD trip time testing
Continuity testing of all protective conductors
Polarity verification on all circuits
Completion certificate and test schedule
As-built drawings, DB schedules, test records, and warranty register at handover

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Benefits

Design & Distribution

Load schedules, single-line diagrams, and DB layouts prepared before a single cable is pulled

Phase balancing across all distribution points, reduces energy waste and prevents equipment damage

Circuit segregation from source—lighting, power, HVAC, smart systems, and critical loads on independent circuits

Reliability & Protection

Automatic Transfer Switch (ATS) — seamless, zero-intervention PHCN-to-generator handover

MDB and sub-distribution boards sized correctly for today's load and tomorrow's growth

Surge protection and overcurrent devices at every distribution level

Earthing and bonding installed and tested to Nigerian and international standards

Lightning protection where site exposure and building height require it

Integration & Compliance

Fully coordinated with ELV, smart automation, solar, and generator systems—no conflicts between trades

Energy metering at MDB, sub-DB, and tenant levels—visibility over every circuit and its cost

Drawings, test results, and installation certificates delivered at handover—not chased afterwards

Use cases

Commercial office buildings — full electrical infrastructure from design to commissioning

Hotels and hospitality properties — guest room, back-of-house, kitchen, and common area systems

Industrial facilities, factories, and warehouses—heavy load circuits, motor starters, three-phase distribution

High-end residential estates and luxury homes—coordinated with smart and solar systems

Healthcare facilities—clinical and non-clinical power segregation, UPS-critical circuits, compliance documentation

Existing buildings upgrading overloaded, non-compliant, or ageing electrical infrastructure

Fit-out electrical works — tenant floors, office fit-outs, and hotel room reconfigurations

What Daayra delivers

Design

Electrical load schedule—all loads itemised, phased, and totalled for accurate sizing

Single-line diagram — full distribution hierarchy from utility intake to final circuits

Distribution board schedules — circuit descriptions, breaker ratings, and load allocations

Earthing and lightning protection design where required

Distribution & Wiring

Main Distribution Board (MDB) — supply, installation, busbar, metering, and main breaker

Sub-distribution boards — floor and zone boards with MCBs, RCDs, and surge protection devices

Final circuit wiring — lighting, sockets, HVAC isolators, and equipment connection points

Cable containment — conduit, trunking, cable tray, and ladder rack throughout

Three-phase and single-phase wiring to all specified load points

Busbar chambers and rising mains for multi-storey and mixed-use buildings

Power & Changeover

PHCN intake and metering arrangement

Automatic Transfer Switch (ATS) — mains-to-generator changeover with configurable delay and back-transfer logic

Manual changeover for smaller installations or backup override

Generator connection panels and supply cabling

UPS circuits for servers, security, fire alarm, and life safety loads

Earthing & Protection

Earth electrode installation with resistance measurement and test links

Equipotential bonding — pipework, structural steel, containment, and equipment frames

Surge protection devices at MDB, SDB, and sensitive equipment positions

RCD and RCBO protection on all final circuits as required

Lightning protection air terminals and conductor installation where designed

Lighting

Internal lighting — ceiling, recessed, surface, track, and wall positions

Emergency lighting—self-contained and central battery systems for means of escape

External lighting — car park, perimeter, landscape, and facade positions

Street and estate road lighting where required

Smart lighting wiring — dimmer circuits, sensor positions, and control panel connections

Testing & Handover

Insulation resistance, earth fault loop impedance, and RCD trip time testing

Continuity testing of all protective conductors

Polarity verification on all circuits

Completion certificate and test schedule

As-built drawings, DB schedules, test records, and warranty register at handover