Earth Bonding Gas Meter Cost Guide

Earth bonding is also known as equipotential bonding. It is a procedure in which gas pipes are connected to the property's main electrical earthing system. It means it is a process that ensures all the metal pipework on the property is at the same electrical potential. The bonding then helps reduce the risk of electrical shock in the event of a fault. Earth bonding is a legal requirement in the UK under the IET Wiring Regulations BS 7671. It is also an important safety precaution.

It is seen that most homeowners do not know its importance or the hazards of not having it. They come to know when any electrical or gas engineer comes for inspection and points out its absence. In its absence, a single fault can expose the pipework to dangerous conditions. 

In this blog, you will learn about earth bonding, its requirements and costs in the UK, and the factors driving its price increases. Earth bonding is a significant process for the safety of any property.

Importance of Earth Bonding

It is the connection of the metallic parts of a property, including water and gas pipes, to the property's central earthing system. It does not indicate that electricity flows through the pipes during regular use. But it provides a safe path to earth in case a damaged electrical cable comes into contact with the gas pipe.

The primary purpose is to ensure the same electrical potential across all metallic pipes installed on a property. If there is no earth bonding, a severe electrical shock can occur if any faulty appliance or cable comes into contact with the gas pipe. In the case of proper earth bonding, current travels to earth through the bonding and immediately trips the circuit breaker or fuse. 

The wiring used for earth bonding in the UK is 10 mm² in diameter, with a specific color of green and yellow, and is a copper conductor. This wiring is clamped to the gas pipe near the gas meter. It is not something you can install yourself, as it can be dangerous. Always contact a qualified engineer to do this work so they can comply with BS 7671:2018 IET Wiring Regulations. It is essential for the safety of your home and the people around you so that there can be no electrical hazards.

Why Earth Bonding for Gas Meters is Needed

It is a legal requirement in the UK, so there is no way out. It comes under Part P of the Building Regulations. It is a serious matter that can risk lives, thus everyone is mandated to follow the regulations. The gas meters are usually near the wiring, which means a minimum fault can lead to a dangerous situation as the current can flow along the pipe. 

A person can face a severe electric shock if they touch the pipe while having contact with a conducting surface. These are the scenarios in which bonding comes into effect: the fuse or circuit breaker will trip immediately, preventing a dangerous situation. It is required to comply with the regulations as well. There is a routine checkup of earth bonding when you apply for Gas Safety Certificates, as well as during Electrical Installation Condition Reports. 

The gas engineers, property inspectors, and NICEIC electricians thoroughly check for bonding during inspection visits. The inspection fails if the bonding is not done adequately or incompletely, as it is a critical criterion for property landlords to fulfill. Modern homes have mostly plastic pipework installed, but the entrance section has metallic parts that require earth bonding. If you do not fulfill this requirement, the insurance of your property can be invalidated as well, and you compromise the safety of your home. 

Components of Earth Bonding

A combination of materials is used for earth bonding under the guidance of professional engineers. The engineers are trained in this matter; thus, they make sure each regulation is complied with. Some main components are as follows:

1. Type of conductor used in Bonding: The conductor commonly used for earth bonding in the UK is 10 mm², with a preferred color of green and yellow, and the metal used is copper. The function of this conductor is to have a connection to the main earthing system of the property. It helps to create a path with low resistance so that faulty currents can flow through it. 
2. Quality of Connectors and Clamps: Ensure the clamps are high-quality and not cheap, so the connection remains durable. Additionally, high-quality connectors should be used to join the conductor to the main unit. It should be noted that both components should be corrosion-resistant to prevent bonding degradation over time. 
3. Trunking of Cable: Trunking, or conduit, protects the cable conductor in case of damage, especially in high-traffic areas. It also helps to keep the installation neat and not messy. 
4. Testing of Equipment after Installation: Electric engineers test all equipment and wiring after installation to ensure compliance with BS 7671 standards. 
5. Manual work: It should be done professionally by a trained engineer. It includes drilling, cable routing, clamp fixation, and electrical wiring testing. Most of the cost goes into this component as it requires precision and involves legal compliance. 

It is critical to use the correct materials and to be precise about the installation techniques. Any loose end can lead to inspection failure and a safety risk. 

Factors that Influence Costing in the UK

The cost of earth-bonding a gas meter in the UK can vary significantly depending on several factors. Understanding these will help homeowners and landlords budget effectively and avoid unexpected expenses:

1. Complexity and Total Distance of Bonding: The distance between the main gas unit and bonding conductor is crucial, as it influences the cost directly. The long or complex route in which drilling is required through ceilings, walls, and floors increases the cost of material as well as labor. 
2. Type of Property: Another main factor affecting the cost is the type of property. Flats or a detached property where access to the meter is difficult cost more compared to a semi-detached house, where the meter is easy to reach. Difficult access prolongs installation time and increases costs. 
3. Labor Rates: Labor rates can vary by area. In rural areas and Northern England, the rates are lower compared to the South East and London. Moreover, professional electrical engineers who are Part P certified charge more than the usual ones, but they ensure everything complies with legal requirements. 
4. Quality of Material and Upgradation: Sometimes, the main earthing unit may require an upgrade to improve compliance, which can increase costs. Copper cables are inexpensive themselves, but trunking and corrosion-free components may add to the total cost. 
5. Compliance and Certification: Issuance of EIC (Certificate of Electrical Installation) is normally included in the labor cost. An extra fee may be charged if it's not included. It is very important to make sure that legal compliance is met. 

Cost of Earth Bonding in the UK

Many factors contribute to deciding the cost of earth bonding in the UK. The main factors include the property's location, type, and complexity. The average range is £150-£250. This is the rate of standard installation, in includes certification, materials, and professional labor. If the bonding is required for a small flat where meter access is easy, then it can cost around £75 to £120. These are time-consuming jobs, thus costing less. 

The cost for a complex property structure where the meter is not easily accessible then the cost is around £300 and £400. Drilling, long cable runs, trunking, and any required upgrades influence the cost. Prices can also vary by region, with Central London having higher rates than Northern England. Sometimes, there are offers in which you can get both water and gas bonding at a discounted price. 

FAQs

What is the most suitable place for the installation of earth Bonding?

Ans: The most suitable point to install earth bonding is the main entrance point of the pipework. The best is to install it within 600mm of radius. 

How can I know whether the earth bonding is required for my property or not?

Ans: It is a legal requirement; thus, it is important to consult a professional certified engineer so that they can inspect your property and let you know about the requirement.

What is the general cost of the earth bonding installation?

Ans: It ranges from £75 to £400 depending upon the location, region, labor required, and type of property. 

Conclusion

Earth bonding is a crucial preventive measure for your home's safety. Other than safety, it is a legal requirement in the UK to comply with BS 7671 regulations, which state that earth bonding is essential to ensure that insurance and inspection of the property remain valid. The cost ranges from £75 to £400, as it depends on multiple factors, as discussed. Professionals should be hired rather than trying to do it themselves, as it is a risky job. Make sure to schedule regular inspections to avoid dangerous situations and to ensure compliance with legal requirements.