Burner HT Cable for Oil & Diesel Burners | Wisdo Merchants
Technical Overview
| Item | Details |
|---|---|
| Product | Burner HT (high-tension) ignition cable |
| Function | Carries high voltage from the ignition transformer to the ignition electrodes |
| Used on | Oil and diesel burners with transformer and electrode ignition |
| Typical burners | Domestic, commercial and industrial burners, including Riello and Baite models |
| Works with | Burner ignition transformers and burner electrodes |
| Supply | Sold by Wisdo Merchants, Industrial Area, Nairobi |
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Burner HT Cable for Oil and Diesel Burners
A burner HT cable carries the high-voltage current that lights your boiler, oven or dryer. HT stands for “high tension”, meaning high voltage. The cable connects the ignition transformer to the burner electrodes. When it cracks, burns or loosens, the spark weakens and the burner fails to light. At Wisdo Merchants in Nairobi, we supply HT ignition cables to boiler technicians, bakeries, laundries and maintenance teams across Kenya.
Why a Good Burner HT Cable Matters
Every time an oil burner starts, the transformer sends thousands of volts through the HT cable to the electrodes. A spark then jumps across the electrode gap and ignites the fuel spray from the nozzle. If the cable insulation is damaged, current leaks away before it reaches the electrodes. As a result, the spark becomes weak or disappears completely.
The burner then tries to start, fails to ignite and goes to lockout (a safety shutdown). For a hotel boiler or bakery oven, that means lost hot water, cold ovens and an urgent call-out. Replacing a worn HT cable is quick and inexpensive. Therefore, it is one of the first parts to check when a burner struggles to light.
Burner HT Cable Features and Benefits
- Reliable spark: A sound cable delivers full high voltage to the electrodes, so the burner lights first time.
- Fewer lockouts: Good insulation stops current from leaking to the burner body, which reduces failed starts and nuisance shutdowns.
- Quick replacement: Technicians can usually swap the cable in minutes without removing the burner from the boiler.
- Lower running costs: Clean, first-time ignition avoids unburnt fuel building up in the combustion chamber.
- Expert matching: Our team helps you choose the right cable and terminals for your burner model.
Technical Overview
| Item | Details |
|---|---|
| Product | Burner HT (high-tension) ignition cable |
| Function | Carries high voltage from the ignition transformer to the ignition electrodes |
| Used on | Oil and diesel burners with transformer and electrode ignition |
| Typical burners | Domestic, commercial and industrial oil and diesel burners |
| Insulation | Red high-voltage insulated lead |
| Terminals | Ready-made, with brass push-on terminals in black insulating sleeves at both ends |
| Works with | Burner ignition transformers and burner electrodes |
| Supply | Sold by Wisdo Merchants, Industrial Area, Nairobi |
Cable length and terminal type vary between burner models. Share your burner make and model, or a photo of the old cable, and we will confirm the right match.
Burner HT Cable Applications and How to Fit It
Our HT ignition cables suit burners used for:
- Steam and hot water boilers in hotels, hospitals, schools and factories
- Bakery ovens and commercial kitchen equipment
- Dryers, laundry equipment and process heating plants
- Diesel burners such as the Riello G5 burner and similar models
For example, a hotel boiler that locks out every morning often has a cracked HT lead near the hot burner head. Replacing it usually restores reliable ignition straight away.
How to replace the cable:
- First, switch off and isolate the power supply to the burner.
- Next, note how the old cable is routed, then pull it gently off the transformer and electrode terminals.
- Then push the new cable firmly onto both terminals until it seats fully.
- After that, route the cable away from hot surfaces and sharp edges.
- Finally, restore power and run the burner to confirm it lights cleanly.
While the burner is open, also inspect the electrodes, the burner nozzle and the electrode gap. Worn parts there cause similar ignition faults.
Safety and Handling
An HT cable carries very high voltage while the burner runs. Always isolate the power before you touch the cable, transformer or electrodes. Never test for a spark by holding the cable. In addition, keep the cable clear of fuel leaks and oil-soaked surfaces.
Replace any cable that is cracked, brittle, burnt or loose at the terminals. Do not repair a damaged HT cable with insulating tape, because high voltage can still escape through the damaged section. If you are unsure, ask a qualified burner technician to fit the part.
Frequently Asked Questions
How do I know my burner HT cable needs replacing?
Common signs include a burner that fails to light, frequent lockouts and a weak or missing spark. You may also see cracks, burn marks or loose terminals on the cable itself.
Can I repair a damaged HT cable?
No. Tape cannot safely contain the high voltage, so current may still leak. Instead, replace the cable with a new one.
Will any HT cable fit my burner?
Not always. Length and terminal type differ between models. Send us your burner make and model, and we will confirm the correct cable.
Should I check other parts at the same time?
Yes. A failing transformer, worn electrodes or a blocked nozzle can cause the same symptoms. Our team can help you diagnose the fault and supply the parts.
Order a Burner HT Cable in Nairobi
Keep your boiler, oven or dryer lighting first time. Wisdo Merchants supplies burner spares from Dar es Salaam Road, off Enterprise Road, Industrial Area, Nairobi. Confirmed orders are delivered the same day, subject to stock availability. Call +254 795 938305 or email sales@wisdomerchants.com for a quote.
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