CCTV Installation in Kisumu and Western Kenya: Getting the Power Right

When a CCTV system in western Kenya stops working, the camera is usually the last thing at fault. The usual culprits are a power supply that died when electricity came back after an outage, a recorder that corrupted its disk during a brownout, or water that found its way into a joint during the long rains. Choosing a camera takes an afternoon. Getting the power and cabling right is what decides whether the system is still recording next year. This guide is for homes, shops, schools and offices in Kisumu, Kakamega, Bungoma, Kisii, Busia and the surrounding counties, and it focuses on that unglamorous side of the job.

Why power decides whether CCTV keeps working

A CCTV system is a set of small electronic devices running around the clock. Three kinds of power problem hurt it:

• Outages. When the power goes off, an unprotected system stops recording. If the recorder was writing to the disk at that moment, the file system can be damaged, and repeated hard shutdowns shorten a disk's life.
• Surges and spikes. The moment power returns after an outage, and during storms, the supply can spike. Cheap power adaptors and camera boards are the first casualties. A common pattern is one camera dying after each storm until someone fixes the cause.
• Brownouts. Low voltage for long periods makes power supplies run hot and can cause cameras to reboot in a loop, especially at night when the infrared or white light comes on and the camera draws more current.

None of these are solved by buying a more expensive camera. They are solved by earthing, surge protection and correctly sized power supplies, in that order.

Earthing: the part many installs skip

An earthed system gives a surge somewhere to go other than through your recorder. In practice that means:

• A proper earth electrode for the building, tested by an electrician, with the recorder, network switch and any metal equipment cabinet connected to it.
• Metal poles carrying outdoor cameras bonded to earth, particularly tall poles standing in the open.
• One earthing system for the CCTV equipment, not a separate improvised rod for each device. Separate earths at different points can let current flow along the data cables between them.
• If the property also has an electric fence, its energiser earth is a separate system. Keep it apart from the building's electrical earth as the energiser's manual describes, and do not tie CCTV equipment to the fence earth.

Work on the building's earthing and distribution board is electrical installation work. In Kenya that generally has to be done by, or under the supervision of, a licensed electrical worker under the Electric Power (Electrical Installation Work) Rules, 2006 (EPRA electricity regulations). A CCTV installer can tell you what is needed; the board work itself is for the electrician.

Surge protection, layer by layer

No single device stops every surge. Protection works in layers, each catching what the one before missed.

1. At the distribution board. A surge protection device fitted in the board by an electrician protects every circuit in the building, not just the CCTV.
2. At the recorder. The recorder, router and PoE switch should plug into a UPS with automatic voltage regulation, not straight into the wall. The APC 650VA UPS (KSh 8,000) is a line-interactive unit with AVR, accepting 180–270 V input, which smooths brownouts as well as covering outages.
3. At the camera power supply. For HD analogue cameras powered from 12V, a proper switch-mode supply is much safer than a pile of cheap plug-in adaptors. Our 12V 3A power supply unit (KSh 1,800) has short-circuit, overload and over-voltage protection built in.
4. On long outdoor data runs. A network cable running between two buildings, or up a tall pole, can pick up a surge from a nearby strike and carry it to the switch. Where runs like this are unavoidable, ask about data-line surge protection at each end, and keep the run as short as practical.

Sizing the power supply, PoE switch and UPS

Undersized power supplies are a quiet cause of night-time faults. A camera can work all day, then reboot every few minutes after dark because its light has switched on and the supply cannot keep up. Size everything with headroom, roughly 20–25% spare, rather than running a supply at its limit.

Read the power rating on each device's label or datasheet. The figures in this table are an illustration of the method, not the ratings of any particular product:

The 8-port switch in that example is the D-Link DGS-1100-08P (KSh 13,800), which has 802.3af PoE on all eight ports and a 64 W PoE budget. If you go the HD analogue route with cameras such as the Hikvision ColorVu 1080p (KSh 3,400), note that it records to a DVR rather than an NVR, and it needs 12V power at each camera position; our post on IP versus analogue CCTV compares the two approaches.

The 650VA UPS above is rated at 325 W. On a small system that load fits comfortably, but run time is limited by its battery: expect minutes to perhaps an hour depending on load and battery age, not a full night. The manufacturer's runtime chart is the reference. For long outages, the options are a larger UPS or a battery-and-inverter setup; our guide on UPS backup for CCTV explains how to work it out, and the power and accessories section lists what we stock.

One more point on 12V cameras: voltage drops along thin cable. A camera 50 metres from its power supply on thin wire may get noticeably less than 12V, and that shows up as night-time reboots. Either run heavier power cable, place the supply closer to the cameras, or use PoE, which handles distance better.

Running cable through the rains

Western Kenya gets heavy rain for long stretches of the year, and cable that is fine in a dry season fails once the ground is soaked.

• Use outdoor-rated cable for anything outside. The ASL outdoor Cat6 cable (KSh 18,000) has an outdoor jacket for sun and moisture. Indoor cable on an outside wall cracks and wicks water.
• Bury in conduit, not bare. Cable crossing a compound goes in conduit in a trench, deep enough that a jembe will not reach it, with pull boxes at the bends.
• Keep data and mains apart. Do not share a conduit with mains power. Running them together invites interference and lets a mains fault reach the cameras.
• No joints in the open. Every joint goes in a sealed box. Bring cables into boxes and cameras from below with a drip loop so water runs off before it reaches the connector.
• Respect the 100-metre limit. A network cable run from camera to switch should not exceed 100 metres. Beyond that, add a switch part-way or use fibre.

If cameras start dropping out during or after rain, check joints and boxes first. Our CCTV troubleshooting guide walks through the order of checks.

Notes for Kisumu, Kakamega, Bungoma, Kisii and Busia

Kisumu. Near the lake, swarms of lake flies and other insects gather around lights at night. Cameras with built-in lights attract them, and spider webs follow. Expect false motion alerts and a hazy night picture unless the cameras are cleaned regularly; mounting under an overhang rather than next to an outside security light helps.

Kakamega. With frequent rain, the sealing and drip-loop points above matter most here. Check junction boxes after the first heavy storms of each season.

Bungoma and Busia. Shops and stores in busy trading centres are the common case. Keep the recorder inside, locked and on a UPS, and point one camera at the till. For businesses recording staff and customers, the Data Protection Act, 2019 generally applies, including ODPC registration and signage (Kenyans.co.ke summary); confirm current requirements with the ODPC.

Kisii. Hilly plots mean buildings at different levels and cable runs that climb or drop steeply. Plan conduit routes that stay out of runoff channels, and anchor cable on slopes so it does not drag on its connectors.

Ordering from Nairobi and arranging installation

Our shop is in Nairobi, at White Angle House, Room 62, Kenneth Matiba Road. Orders to Kisumu, Kakamega, Bungoma, Kisii, Busia and the rest of western Kenya are delivered for a flat KSh 300 per order, typically within 24 to 48 hours, with cash on delivery; see our shipping page. Most products carry the manufacturer's warranty, and returns are accepted within 7 days. To check how much disk space your cameras will need, use the CCTV hard disk calculator.

We supply and install CCTV in Kisumu and across Western Kenya. Call or WhatsApp us on +254 718 811 661 to discuss your site and get a quote. Tell us how many cameras you need, the distances between buildings and what backup power is already there, and we can advise on the parts list.