UK manufacturers lose 800 hours yearly to downtime from wiring faults

Faulty wiring linked to costly UK manufacturing downtime

UK manufacturers lose around 800 hours of production time each year due to equipment downtime, according to precision tooling distributor Heamar.

The company said the delays amount to more than 15 hours per week, often blamed on mechanical or software failures.

David Martin, Managing Director at Heamar, said: “Every second counts in the manufacturing sector; even minor delays caused by unforeseen issues can result in major disruption.

“According to The Chartered Institute of Logistics and Transport, downtime costs UK manufacturers around £180 billion each year.

“There have been numerous high-profile incidents of downtime affecting major manufacturing sites. For example, in 2023, Toyota’s Japanese manufacturing plant was knocked offline for 24 hours due to a single software glitch.

“In the UK, Jaguar Land Rover experienced a major shutdown in August/September 2025 due to a cyber-attack, halting production and disrupting the supply chain.”

Martin added: “Whilst modern manufacturing continues to advance, particularly with the integration of AI, these examples show how software can be unreliable sometimes.

“Combine that with faulty wiring, which can be responsible for a significant share of disruptions, downtime can become a costly mistake.”

Hidden electrical faults undermine production efficiency

Heamar explained that electrical preparation errors are often invisible until they cause system failure.

Martin said: “Failures and faulty wiring can trigger serious operational problems with knock-on effects across the supply chain.

“From poor crimps and nicked wire conductors, to damaged insulation, seemingly minor electrical prep errors can have serious consequences.

“These issues can lead to control panel failures, sensor dropouts, or even motor stoppages and emergency shutdowns caused by short circuits.

“The real problem is that these faults are often invisible to the naked eye and only become apparent once they cause a full production halt, costing manufacturers valuable hours or even days in lost output.”

Tooling quality and technician training key to prevention

Martin noted that the root causes of downtime often lie in outdated tools and limited training for electrical technicians.

He said: “One major contributing factor of software issues caused by faulty wiring is the continued use of worn or inappropriate tools for stripping and crimping connections.

“Even a slightly inconsistent crimp or a wire that has been nicked when stripping its insulation can introduce resistance, heat, or circuit instability, all of which degrade system reliability over time.

“What’s interesting is that while manufacturers invest heavily in automation and digital monitoring, the quality of the electrical work behind it is often overlooked.”

Martin continued: “That’s why a combination of training, tooling, and process discipline is essential. While some managers may view this as an avoidable expense, the cost of inaction is far greater; one wiring mistake can lead to hours of costly disruption.

“To prevent avoidable downtime, workshops, and production teams must ensure technicians are properly trained and equipped with precision-calibrated tools; including wire strippers, crimping tools and wire connectors designed for modern control systems.

“Quality assurance at the wiring stage is one of the simplest and most cost-effective ways to improve uptime. With the right tools and standards in place, factories can dramatically reduce avoidable stoppages and extend equipment life.

“When paired with ongoing skills’ development, technicians are better able to spot issues before they escalate, shifting maintenance from reactive to proactive. In a sector where every minute of uptime counts, that level of preparedness is critical.”

Relevance for fire and safety professionals

Electrical and mechanical engineers working in industrial and manufacturing settings can draw parallels between Heamar’s findings and safety-critical environments.

Faulty wiring and poor electrical preparation have direct implications for fire risk, as resistance and heat build-up in mis-crimped or damaged connections can increase the chance of ignition.

Maintenance supervisors, risk assessors and safety auditors can use this insight to strengthen preventive maintenance strategies by integrating regular wiring inspections and staff training into equipment safety programmes.

Procurement officers responsible for specifying tools and testing devices can also ensure equipment meets precision standards to reduce both downtime and electrical fire hazards.