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0803 205 2517 info@maintenance.com.ng
IEC 60364 & NESPA COMPLIANT

Industrial & Domestic
Electrical Engineering

Complete electrical installations for manufacturing facilities, commercial complexes, and residential estates. Load calculations, distribution design, switchgear integration, and full commissioning.

TECHNICAL CAPABILITIES

Full-Scope Electrical Engineering & Installation

From 11kV primary distribution to final sub-circuit termination. We design, install, test, and commission complete electrical systems for industrial and domestic applications.

INDUSTRIAL

LV & MV Power

415V to 11kV installations

Primary & Secondary Distribution

Complete switchgear installation, transformer connections, and power factor correction systems.

Motor Control Centers

MCC panels, VFD installations, soft starters, and PLC-controlled motor circuits up to 500kW.

Industrial Backup Power

Generator synchronisation, ATS/MTS panels, and industrial UPS systems for critical processes.

DOMESTIC & COMMERCIAL

Building Electricals

230/415V final distribution

Residential & Commercial Wiring

Complete rewiring, new build installations, consumer unit upgrades, and circuit protection coordination.

Solar PV & Energy Storage

Grid-tie, hybrid, and off-grid solar installations. Battery bank sizing and inverter commissioning.

ELV & Security Systems

CCTV, access control, data cabling, and home automation integration.

INDUSTRIAL INSTALLATIONS

What We Deliver in Industrial Electrical

Technical specification, execution methodology, and commissioning protocols.

11kV to 415V

Primary & Secondary Distribution

SCOPE OF WORK
  • Switchgear Installation: RMU, VCB, ACB, MCCB panel installation and busbar connections
  • Transformer Commissioning: 500kVA to 2.5MVA, oil-filled and cast resin, tap changer setting
  • Cabling: Armoured XLPE/SWA/PVC, glanding, termination, and identification per cable schedule
EXECUTION METHOD
  • Load flow analysis & short circuit calculation
  • Protection coordination study
  • Primary injection testing & relay calibration

Motor Control

VFD • Soft Starter • MCC • PLC

SCOPE OF WORK
  • MCC Panels: Form 2 to Form 4 segregation, drawer-type or fixed, IP42 to IP54
  • Variable Frequency Drives: 0.75kW to 315kW, sensorless vector control, brake choppers
  • PLC Integration: Siemens, Allen Bradley, Schneider - programming & HMI development
EXECUTION METHOD
  • Motor starting current calculation
  • Harmonic analysis & filtering
  • IO mapping & logic development

Power Quality

PFC • Harmonic Filters • APFC

SCOPE OF WORK
  • Power Factor Correction: Capacitor bank sizing, automatic APFC panels, detuned reactors
  • Harmonic Mitigation: Passive & active harmonic filters, THD reduction to <5%
  • Power Monitoring: Energy meters, power analyzers, SCADA integration
EXECUTION METHOD
  • Power quality audit (7-day logging)
  • Capacitor sizing calculation
  • Harmonic spectrum analysis
DOMESTIC & COMMERCIAL

Residential & Commercial Electrical Systems

From single-phase domestic rewires to three-phase commercial installations.

Complete House Wiring

New Builds Rewires Extensions
WHAT WE DO:
  • Consumer Units: 4-way to 24-way, RCBO protection, SPD installation
  • Final Circuits: Ring mains, radial circuits, lighting circuits, cooker/showers
  • Earthing: TN-S, TN-C-S, TT systems, earth rod installation, bonding
  • Testing: IR test, loop impedance, RCD trip times, PIR/EICR certification

Solar PV Systems

Grid-tie Hybrid Off-grid
WHAT WE DO:
  • System Design: Load profiling, panel orientation, string sizing, shading analysis
  • Installation: Roof-mounted, ground-mounted, solar tracking, battery banks
  • Inverters: String inverters, micro-inverters, hybrid inverters, bimodal operation
  • Battery Storage: Lithium-ion, lead-carbon, battery management systems

Commercial Fit-out

Offices Retail Restaurants
WHAT WE DO:
  • Distribution: 3-phase DBs, sub-mains, rising mains, busbar trunking
  • Lighting: LED retrofits, emergency lighting, DALI/BMS integration
  • Small Power: Socket outlets, floor boxes, underfloor distribution
  • HVAC Electrical: AHU connections, chiller power, control wiring
ENGINEERING METHODOLOGY

Our Electrical Installation Process

Systematic approach from concept to commissioning

01

Technical Assessment

Load audit, site survey, existing installation evaluation

  • Load profiling & demand calculation
  • Short circuit & fault level analysis
  • Earthing system verification
02

System Design

Detailed schematics, specifications, and compliance documentation

  • Single line diagrams & schematic drawings
  • Cable sizing & voltage drop calculation
  • Protection coordination study
03

Installation

Professional execution with minimal disruption

  • Cable pulling, tray & trunking installation
  • Panel fabrication & assembly
  • Termination & labelling per schedule
04

Testing & Commissioning

Verification, certification, and handover

  • Insulation resistance testing (IR)
  • Earth loop impedance measurement
  • Functional testing & EICR certification
SPECIFICATION STANDARDS

We Install to International Standards

All materials and workmanship comply with:

  • IEC International Electrotechnical Commission
  • NESPA Nigerian Electrical Safety Code
  • ISO ISO 9001:2015 Quality Management
  • BS British Standards (BS 7671, BS EN)
Schneider Electric
MCB, RCD, DB, Switchgear
Siemens
PLC, VFD, MCC, Control
ABB
Contactors, Relays, Breakers
Legrand
Wiring devices, Cable management
Full Documentation Provided

As-built drawings, cable schedules, test certificates, operation & maintenance manuals

24/7 ENGINEERING SUPPORT

Electrical Maintenance & Emergency Response

Preventive maintenance contracts • 2-hour emergency response • Fully equipped service vehicles

  • Quarterly PPM inspections
  • Thermographic scanning
  • Load monitoring & analysis
  • Emergency fault diagnosis
  • Spare parts management
  • Annual compliance certification

24/7 Emergency

+234 803 205 2517


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