Commercial
Three-storey office electrical fit-out
Full lighting, small power and distribution for a commercial office refit — boards labelled, tested and certified before handover.
Nairobi · Commercial & Industrial
Power installed with precision. Delivered with proof.
Semji Limited designs, installs and maintains electrical systems for commercial and industrial clients across Kenya — engineered to code, tested to certainty, and built to keep running.
EPRA-guided practice
KS/IEC wiring standards
Fully insured works
100%
Certified sign-off
24/7
Emergency response
0-harm
Safety commitment
// 01 · Capabilities
What we wire, maintain and certify
Four disciplines under one licensed team — from first-fix installation to the compliance paperwork that keeps your insurer and your regulator satisfied.
01
Electrical installations
New builds, fit-outs and upgrades — distribution boards, wiring, three-phase supply and controls.
Explore 02Maintenance & repair
Planned preventive maintenance, fault-finding and rapid response to keep operations powered.
Explore 03Equipment hire & supply
Generators, distribution and tooling through trusted supplier partnerships — sized to your site.
Explore 04Safety & compliance
Inspection, testing, earthing verification and certification documentation you can hand to auditors.
Explore
// 02 · Why Semji
A young firm with an engineer's discipline
We are deliberately building a reputation the slow way — through documented work, clean installations and clients who call us back. Every job leaves a paper trail you can trust.
Read our story01
Safety before speed
Isolation, lock-off and risk assessment on every task. We would rather move a deadline than move a corner.
02
Qualified technical staff
Trained, certification-guided electricians who work to KS and IEC wiring standards — not improvisation.
03
Everything documented
Test results, drawings and certificates handed over on completion. Your compliance file, ready for audit.
04
Responsive when it counts
Downtime is expensive. Our maintenance clients get a same-day path to a technician, day or night.
// 03 · Trusted on site
What clients say about working with us
They treated our factory fit-out like their own. Clean routing, labelled boards, and every certificate in hand on the day we opened.
Operations Lead · Light industrial client
Fast to site when a distribution board tripped repeatedly. Found the fault, explained it plainly, fixed it properly.
Facilities Manager · Retail complex, Nairobi
Young team, but the professionalism is not junior. Quotes are detailed and they stick to what they promise.
Project Consultant · Commercial developer
EPRA-guided practice
KS & IEC standards
Insured & bonded
KEBS-referenced materials
Built young. Run like it matters.
Semji Limited is an upcoming electrical contracting firm in Nairobi. We are small enough to care about every connection, and disciplined enough to document every one.
// Our story
A contractor clients can grow with
Semji Limited was founded on a simple frustration: too much electrical work in Kenya is done fast, undocumented, and left for the next person to untangle. We started to prove another way is possible — installations that are clean, tested and certified, delivered by technicians who treat the trade as engineering.
We are a young company, and we say so openly. What we lack in decades, we make up for in rigour, responsiveness and a genuine hunger to earn a long-term reputation. Every project we take on is a chance to show what careful electrical work looks like.
Company profile
Registered asSemji Limited
Base of operationsNairobi, Kenya
FocusCommercial · Industrial
Working standardsKS · IEC
StageGrowth
EthosSafety-first
// What we stand on
Mission & the values that hold it up
Our mission is to deliver electrical systems that are safe, compliant and dependable — and to build a Kenyan contracting business known for doing things properly, at scale.
Safety is non-negotiable
Isolation, testing and PPE are not optional extras. We protect our people, your people and your property on every job.
Precision over speed
Neat routing, correct sizing and labelled boards. Work that the next technician — and the auditor — can read at a glance.
Growth with integrity
We want to scale — but only on a foundation of work we're proud to put our name on. Reputation compounds.
Compliance as standard
We work to recognised wiring standards and hand over documentation — not promises — on completion.
Responsiveness
Fast quotes, clear timelines and a real person on the phone when a fault can't wait until morning.
Partnership
We build long relationships with clients and suppliers so we can bring the right equipment and expertise to any brief.
// Trajectory
Where we are, and where we're headed
A young firm is a growing firm. Here's the honest arc — from first installations to the scaled, certified contractor we're building toward.
Start
Founded in Nairobi
Semji Limited established with a focus on doing commercial and residential electrical work the documented way.
Now
Building a track record
Delivering installations, maintenance contracts and compliance work — and growing a qualified technical team.
Next
Industrial & scale
Deepening industrial capability, formalising supplier partnerships, and expanding planned-maintenance offerings.
Goal
A trusted name in Kenyan contracting
To be the electrical partner commercial and industrial clients recommend by name — for safety and for standards.
// Leadership & team
The people behind the work
Placeholder profiles — swap in real names, photos and credentials as the team is confirmed. Every technician on site works under qualified supervision.
Managing Director
Founder / Lead
Sets standards, scopes projects and owns client relationships. [Placeholder]
Technical Lead
Chief Electrician
Oversees installations, testing and sign-off to KS/IEC standards. [Placeholder]
Site Supervisor
Operations
Runs day-to-day site safety, scheduling and quality control. [Placeholder]
Client & Quotes
Business
First point of contact for quotes, scheduling and support. [Placeholder]
// Standards & partnerships
The frameworks we work within
We align our practice with Kenya's electrical regulatory and standards bodies, and partner with reputable suppliers. Confirm and display live licence numbers here as they are issued.
EPRA
Energy & Petroleum Regulatory Authority — the framework guiding electrical contractor licensing in Kenya.
KEBS
Kenya Bureau of Standards — we specify and source materials that meet recognised quality marks.
IEC / KS wiring
Installations executed to international and Kenyan wiring regulations for safety and consistency.
Supplier partners
Trusted relationships for generators, switchgear and tooling — the right equipment, sized to the job.
Four disciplines. One accountable team.
From the first cable run to the final certificate, Semji handles the full electrical lifecycle — so you have one contractor to hold responsible.
// Service 01
Electrical installations
Complete power systems for new builds, fit-outs, refurbishments and expansions. We plan the load, install to standard, and label everything so your system is legible for years.
- Distribution boards, sub-mains & three-phase supply
- Lighting, power, data containment & small power
- Motor circuits, controls & machine connections
- Earthing, bonding & surge protection
// Service 02
Maintenance & repair
Electrical faults get worse and more expensive the longer they wait. Our planned maintenance keeps small issues small, and our repair response gets you back online fast.
- Planned preventive maintenance schedules
- Fault-finding, diagnostics & corrective repair
- Board upgrades, rewiring & load re-balancing
- Emergency call-outs with a same-day path to a technician
// Service 03
Equipment hire & supply
Through trusted supplier partnerships, we source and hire the right electrical equipment for your site — correctly sized, safely connected and supported by our own technicians.
- Generator hire, sizing & safe changeover connection
- Temporary power & distribution for sites and events
- Supply of switchgear, cabling & fittings to spec
- Vetted partners for quality-marked components
// Service 04
Safety & compliance
The work isn't finished until it's proven. We inspect, test and document electrical systems so you can satisfy insurers, auditors and regulators — with paperwork, not promises.
- Inspection & testing of new and existing installations
- Earthing verification & insulation resistance testing
- Certification & handover documentation
- Remedial works to bring systems up to standard
// How we work
A clear path from enquiry to sign-off
The same four steps on every job — because predictable process is how you keep quality consistent as you grow.
01
Survey & scope
We visit, assess the load and risks, and agree exactly what's needed.
02
Itemised quote
A clear, line-by-line proposal — materials, labour and timeline, no surprises.
03
Install & test
Careful execution to KS/IEC standards, with testing built into the work.
04
Certify & hand over
Documentation, drawings and certificates delivered on completion.
Work we're happy to be judged on
A growing portfolio of installations, maintenance contracts and compliance jobs. Placeholder case studies below — replace with your own photos and figures as projects complete.
Industrial
Workshop three-phase & motor circuits
Three-phase supply, motor connections and control wiring for production machinery, with correct protection and isolation.
Maintenance
Recurring board trip diagnosed & fixed
Traced an intermittent distribution-board trip to a failing circuit, replaced the affected components and re-balanced the load.
Residential
Full house wiring & certification
First-fix and second-fix wiring for a new residential build — lighting, sockets, water-heater circuits and a certified consumer unit.
Commercial
Lighting & power for retail units
Energy-conscious LED lighting layout and dedicated circuits for a row of retail units, sub-metered per tenant.
Industrial
Generator changeover installation
Sized and installed a standby generator with safe automatic changeover, keeping critical loads live during outages.
Maintenance
Planned preventive maintenance contract
Scheduled inspections and testing across a multi-tenant building, catching wear before it became downtime.
Commercial
Electrical inspection & certification
Full test-and-inspect of an existing installation, with a remedial list and certified documentation for the insurer.
Showing placeholder case studies. Real project photos, client names and metrics can be dropped straight into these cards.
Tell us about your project
Send the details and we'll respond with a clear, itemised quote. Prefer to talk? Call or WhatsApp us directly — a real person will pick up.
// Request a free quote
Project enquiry
Call us
+254 700 000 000
Message us for a fast reply
hello@semji.co.ke
Visit us
Kayole Junction, Nairobi, Kenya
Business hours
Mon–Fri · 8:00 – 17:30
Sat · 9:00 – 13:00
Emergency call-outs 24/7
// Find us
Based at Kayole Junction, Nairobi
Electrical supplies & equipment
Switches, bulbs, sockets, meters, PVC conduit and more — genuine, standards-compliant components. Add to cart and pick up at Kayole Junction.
In stock
Switches
1-Gang 1-Way Light Switch
Single-pole rocker switch for standard lighting circuits. Flush screwless flat plate.
Type: 1-gang 1-wayWhite
KES 250 / pc
In stock
Switches
2-Gang 2-Way Light Switch
Two-gang two-way switch for controlling lights from two points — stairs, hallways, large rooms.
Type: 2-gang 2-wayWhite
KES 420 / pc
In stock
Lighting
LED Bulb 9W — Warm White
Energy-saving 9W LED, B22/E27 fitting, ~806 lumens. Warm 3000K glow for homes and offices.
Type: 9W · 3000KWarm white
KES 320 / pc
In stock
Lighting
LED Bulb 12W — Cool White
Bright 12W LED, ~1100 lumens, 6500K daylight. Ideal for workshops, kitchens and retail.
Type: 12W · 6500KCool white
KES 380 / pc
In stock
Lighting
LED Floodlight 50W
IP66 weatherproof outdoor floodlight for yards, signage and security. Cool white, wide beam.
Type: 50W · IP66Black housing
KES 2,650 / pc
In stock
Sockets
13A Switched Socket — Single
Single 13A switched wall socket, Type G (3-pin), with neon indicator. Shuttered for safety.
Type: 13A · singleWhite
KES 480 / pc
In stock
Sockets
13A Switched Socket — Double
Twin 13A switched socket outlet for desks, kitchens and workstations. Individually switched.
Type: 13A · doubleWhite
KES 780 / pc
In stock
Meters
Single-Phase Digital Sub-Meter
Din-rail single-phase kWh sub-meter with LCD readout — ideal for tenants and cost allocation.
Type: 1-phase · 240VDIN-rail mount
KES 3,500 / pc
Out of stock
Meters
Three-Phase Energy Meter
Three-phase four-wire kWh meter for commercial and light-industrial supplies. Restocking soon.
Type: 3-phase · 415VCT-ready
KES 12,500 / pc
In stock
PVC Pipes
PVC Conduit Pipe 20mm (3m)
Heavy-gauge 20mm PVC conduit for surface and concealed wiring. Sold per 3-metre length.
Type: 20mm · 3mGrey
KES 180 / length
In stock
PVC Pipes
PVC Conduit Pipe 25mm (3m)
25mm PVC conduit for heavier cable runs and sub-mains. UV-stable, sold per 3-metre length.
Type: 25mm · 3mWhite
KES 240 / length
In stock
Accessories
MCB 32A Circuit Breaker
Single-pole 32A Type-C miniature circuit breaker, DIN-rail. Overload and short-circuit protection.
Type: 1P · 32A · Type C
KES 450 / pc
In stock
Cables
Twin & Earth Cable 2.5mm²
2.5mm² flat twin-and-earth cable for ring and radial power circuits. Priced per metre, cut to order.
Type: 2.5mm² · T&E
KES 130 / metre
In stock
Distribution
8-Way Consumer Unit
8-way metal consumer unit / distribution board with busbar. Houses MCBs and RCBOs for the whole installation.
Type: 8-way · metal
KES 4,800 / pc