Professional Electrical Installations in Nairobi & Kenya | GossTech — Residential, Commercial & Industrial
Power Distribution & Sub‑Main Installations in Nairobi and Across Kenya — GossTech
Professional Power Distribution & Sub‑Main Installation Services in Nairobi & Kenya | GossTech
Meta description: GossTech delivers expert power distribution and sub‑main installation services across Nairobi and Kenya — safe LV/MV distribution, sub‑main cabling, switchboards, earthing, testing & commissioning for residential, commercial and industrial projects. Contact 0723613664 • info@gosstech.co.ke • www.gosstech.co.ke.
Introduction — Why correct power distribution matters
Reliable power distribution is the backbone of every safe home, office, factory and public building. Whether you are wiring a new office block in Westlands, upgrading an ageing sub‑main in an industrial park along Thika Road, or commissioning a mini‑grid for a rural community in Kisumu county, professionally designed and installed power distribution systems reduce downtime, prevent fires, and save money over the life of the installation.
At GossTech, we specialise in end‑to‑end power distribution and sub‑main installation services across Nairobi and major towns in Kenya. From design and load calculations through to installation, testing and long‑term maintenance, our certified electricians and engineers deliver compliant, robust systems tailored to each site.
This pillar post explains what we do, the areas we serve (including a full list of estates in and around Nairobi), typical project steps, technical services, compliance and safety practices, and FAQs for clients planning power distribution or sub‑main work.
Quick snapshot — Our core power distribution services
| Service | What it covers | Typical clients |
|---|---|---|
| Power distribution design & load studies | Site surveys, load calculations, single‑line diagrams, protective device selection | Residential developments, offices, factories, malls |
| Sub‑main cable supply & installation | LV sub‑mains, glandings, conduits, tray routing, cable termination | Multi‑storey buildings, commercial fit‑outs, industrial units |
| Switchboard & distribution board installation | Design/supply of DBs, MCCBs, MCBs, isolators, metering | Apartments, retail outlets, public buildings |
| Main earthing & lightning protection | Earth pits, conductor sizing, bonding, SPD installation | All sectors — safety-critical |
| Testing & commissioning | Insulation resistance, continuity, polarity, earth loop, functional tests | New builds, refurbishments, safety compliance |
| Preventive maintenance & inspections | Thermal imaging, torque checks, cleaning, labeling | Facility managers, landlords, property owners |
| Emergency repairs & fault finding | Rapid response to outages, cable faults, tripping | Homeowners, SMEs, industrial clients |
Areas we serve — Nationwide with Nairobi as our hub
GossTech operates across Nairobi and major towns in Kenya. Below we list the areas covered and a summary of the electrical and power distribution services we provide in each.
Nairobi Metropolitan Area (we serve all estates in and around Nairobi)
We serve all the estates in and around Nairobi including (but not limited to):
- Westlands
- Kilimani
- Lavington
- Kileleshwa
- Parklands
- Gigiri
- Muthaiga
- Ridgeways
- Karen
- Lang’ata
- Kawangware
- Rongai
- Embakasi
- South B
- South C
- South C Estate
- South B Estate
- South C & South B areas
- South C, South B and surrounding estates
- Nairobi CBD
- Eastleigh
- Donholm
- Umoja
- Kayole
- Kibera
- Ngara
- Ngong Road corridor
- Thika Road corridor
- Roysambu
- Kasarani
- Zimmerman
- Umoja I & II
- Buruburu
- Githurai
- Huruma
- Mathare
- Kahawa West
- Juja Road suburbs
Note: If your estate isn’t listed above, we still serve it — we operate across Nairobi and all surrounding townships.
What we do in Nairobi:
- Design and install LV/MV sub‑mains for multi‑storey residential and commercial buildings.
- Install main distribution boards (MDB) and tenant distribution boards with proper segregation and labeling.
- Retrofit older installations with safer earthing, surge protection and residual current devices (RCDs).
- Provide ongoing preventive maintenance and load balancing for offices, apartments and retail complexes.
- Emergency response for outages on critical circuits.
Central Kenya (Nakuru, Naivasha, Nyeri, Thika, Kiambu)
Summary: In Central Kenya we support industrial parks, horticulture cold‑chains, commercial centers and growing residential estates. Our services include robust sub‑main installations sized for high starting currents (pumps, chillers), coordination studies for multiple feeders, and MV/LV step‑down coordination where required.
Typical projects: Cold storage facilities in Naivasha, estate sub‑mains in Kiambu, industrial power distribution in Nakuru.
Rift Valley (Eldoret, Kericho, Kapsabet, Nakuru)
Summary: We deliver power distribution solutions for agricultural processors, tea factories, and commercial developments. We focus on reliable starting duty arrangements, harmonics mitigation for motor‑heavy loads and comprehensive testing.
Western & Nyanza (Kisumu, Kisii, Bungoma, Kakamega)
Summary: Services include rural sub‑mains, mini‑grid tie‑ins, LV distribution upgrades in growing towns and industrial electrification for small and medium enterprises.
Coast (Mombasa, Malindi, Kilifi)
Summary: In coastal areas we provide corrosion‑resistant installations, surge protection for lightning‑prone zones and resilient earthing systems adapted for sandy soils.
Eastern & South Eastern (Machakos, Kitengela, Athi River)
Summary: We work with developers and industrial clients to provide scalable sub‑main solutions for warehouses, logistics hubs and residential expansions. We focus on future‑proof conduit routes and easy access for maintenance.
North Eastern & Other Counties (Garissa, Mandera, Wajir, remote towns)
Summary: For remote projects we arrange logistics, modular switchrooms and off‑grid tie‑ins (solar+genset) that integrate with LV distribution and sub‑main infrastructure.
Technical breakdown — What a typical sub‑main or power distribution project looks like
1. Site survey & feasibility
- Walkthrough and asset mapping.
- Load inventory (lighting, sockets, HVAC, motors, lifts) and demand forecast.
- Review existing infrastructure and incoming service capacity.
2. Load calculations & single‑line diagram
- Detailed load calculations (connected vs. demand load).
- Single‑line diagram with protection grading, cable routes and switchgear specification.
3. Design & specification
- Select cable size/type (armored/unarmored, XLPE, PVC), containment (trunking/tray/ducts), and conduit runs.
- Specify MDB, subdistributions, metering and protection equipment (MCCBs, RCDs, relays).
- Earthing and lightning protection design.
4. Installation & cable pulling
- Civil coordination for trenching or containment installation.
- Cable pulling, termination and glandings to manufacturers’ torque specs.
- Installation of switchboards, enclosures and labels.
5. Testing & commissioning
- Insulation resistance tests, continuity, polarity, earth loop impedance and functional tests.
- Thermographic survey to identify hot spots after energization.
- Handover documentation and as‑built drawings.
6. Maintenance & ongoing support
- Planned preventative maintenance schedules, thermal imaging, and mechanical checks.
- Short response time SLA for critical failures.
Compliance & standards we follow
GossTech follows Kenyan standards and international best practice including:
- Kenya Bureau of Standards (KEBS) codes where applicable.
- IEC standards for switchgear, cable sizing and earthing.
- Occupational Health & Safety (OSHA) practices on site.
- Local utility (KPLC/National Grid) interface requirements and metering standards.
We ensure that all installations are documented, tested and issued with appropriate certificates and commissioning reports.
Typical deliverables for clients
- Site survey and proposal.
- Single‑line diagrams and bill of quantities (BoQ).
- As‑built drawings on completion (electrical schematics, cable schedules).
- Test and commissioning reports including insulation and earth tests.
- Maintenance schedule and service agreement options.
Pricing & budget considerations (guide)
Costs vary by scale, cable length, access and the complexity of switchgear. Below is a simple guideline table — contact us for a specific quotation.
| Project size | Typical scope | Ballpark budget (KSh) * |
|---|---|---|
| Small residential | Single‑phase sub‑main, DBs, earthing | 30,000 — 150,000 |
| Medium (multi‑unit) | LV sub‑mains, multiple DBs, surge protection | 150,000 — 750,000 |
| Commercial | Three‑phase sub‑mains, MDB, metering, earthing | 750,000 — 3,500,000 |
| Industrial | MV/LV coordination, large feeders, motor control centres | 3,500,000+ |
* Estimates only. Final quotes after site visit and design.
Why choose GossTech — our differentiators
- Specialised expertise: Certified electricians and engineers experienced in LV and industrial distribution.
- End‑to‑end service: Design, install, commission and maintain — single point of accountability.
- Safety first: Rigorously enforced site procedures, PPE and compliance checks.
- Transparent pricing: Clear BoQs and documentation.
- Rapid response: Nairobi hub for fast emergency response plus regional teams.
Case studies (short)
1. Commercial Office Block — Westlands, Nairobi
Scope: Full LV distribution for a 10‑storey office including tenant sub‑mains, centralised MDB and generator changeover.
Outcome: Completed on time with a 30% reduction in nuisance tripping after load balancing and SPD installation.
2. Cold Storage Facility — Naivasha
Scope: High‑inrush motor starting arrangements, harmonic filters and robust earthing.
Outcome: Stable operation of refrigeration plant and reduced downtime during peak seasons.
3. Retail Mall Upgrade — Mombasa
Scope: Replacement of old sub‑mains, improved segregation and labeling.
Outcome: Faster fault isolation and an improved preventive maintenance program.
Frequently Asked Questions (FAQs)
Q: What is a sub‑main?
A sub‑main is a feeder cable that distributes power from the main distribution board (MDB) to secondary distribution boards or major loads in a building. Sub‑mains are sized and protected depending on load and installation length.
Q: When should I replace an old sub‑main?
If you experience frequent tripping, overheating at termination points, visible damage, or have an increase in connected load without adequate capacity, it’s time for an assessment.
Q: Do you handle MV work?
Yes — for industrial clients that require medium‑voltage coordination we design MV/LV interfaces and liaise with the utility where necessary. MV work is carried out by our qualified teams with appropriate safety and permits.
Q: How long does a typical installation take?
Times vary. Small residential jobs can take a few days; commercial or industrial installations (design, procurement and installation) may take several weeks. We provide realistic timelines after site assessment.
Q: Do you provide warranties?
Yes. We offer workmanship warranties and provide documentation for equipment warranties from manufacturers where applicable.
Checklist — what we need from you before we start
- Site access and any existing drawings.
- List of major loads and operating schedules (e.g., HVAC runtime).
- Utility supply details (incoming capacity, metering point).
- Any landlord or utility permits required.
Contact & call to action
Ready to upgrade your power distribution or install a new sub‑main? Contact GossTech today for a no‑obligation site survey and professional quote:
- Phone: 0723613664
- Email: info@gosstech.co.ke
- Web: www.gosstech.co.ke
We serve projects across Nairobi — including all estates in and around Nairobi — and nationwide across Kenya. Whether it’s a small residential upgrade or a large industrial distribution project, GossTech has the skills and local presence to deliver.
Appendix — Detailed list of common services & deliverables
- Site survey & load inventory
- Single‑line and schematic drawings
- Cable schedules and BOQ
- Switchgear specification and supply
- Cable containment, termination and labelling
- Earthing & lightning protection implementation
- Testing & commissioning reports
- As‑built documentation and handover pack
- Planned maintenance contracts and emergency callouts
Document prepared by GossTech — for enquiries contact 0723613664 • info@gosstech.co.ke • www.gosstech.co.ke