Intrinsic safety is a crucial component of ensuring safety in hazardous environments. Such electrical and electronic equipment are specifically designed and implemented to prevent the equipment from producing sparks or excessive heat that could ignite flammable gases, vapours, or dust in these environments.

However, successfully implementing such safety measures requires careful attention to detail and a thorough understanding of the requirements and regulations. Any mistake during the execution process could compromise the safety of the work environment. Therefore, it is essential that you know the common mistakes to avoid when implementing intrinsic safety measures in your workplace.

Mistake #1: No dedicated ground connection

Intrinsically safe junction boxes are designed to limit the amount of electrical energy that can be transferred to the hazardous environment, reducing the likelihood of an explosion. And to ensure this equipment is intrinsically safe, it requires a dedicated ground connection that has to be maintained over time.

Without a dedicated ground connection to provide a low resistance path for electrical current to flow safely to the ground, there is a risk of potential differences between the equipment and the ground, leading to electrical sparks or discharges. In hazardous environments where explosive gases or combustible dust may be present, the slightest spark or electrical discharge can cause an explosion, potentially causing harm to equipment and personnel.

Mistake #2: Failing to identify Ex enclosures

Explosion-proof enclosures must be clearly identified by providing a warning label that indicates the equipment’s purpose and any necessary safety information. The warning label must be visible and easily readable, clearly signifying the type of hazardous location in which they can be used and any relevant certification information. 

Proper labelling of explosion-proof enclosures ensures the equipment is correctly installed and used in compliance with its requirements. As such, businesses can rest easy knowing the effectiveness of their equipment is not compromised. Worker safety is also prioritised, and companies are not at risk of non-compliance penalties and fines.

Mistake #3: Failing to maintain sufficient distances between intrinsically safe circuits

The circuits in intrinsically safe junction boxes are designed to operate at low voltage and low current levels to minimise the risk of electrical energy transfer. However, if these circuits are in close proximity to each other or non-intrinsically safe circuits, there is a risk that electrical energy could be transferred between circuits through capacitive or inductive coupling. When this happens, electrical sparks or discharges may be generated, igniting explosive gases or combustible dust in the atmosphere.

To prevent such incidents from happening, businesses must maintain a sufficient distance between intrinsically safe circuits to minimise electrical energy transfer. The recommended distance is at least 50mm. Although, other factors, such as the voltage and current levels involved, the type of equipment, and the hazardous environment in which the equipment is being used, can affect the specific distance required. 

Mistake #4: Selecting and installing the wrong cable gland

Cable glands are used to connect cables to equipment and ensure they are secured and protected from damage. As such, the selection and installation process of the cable glands cannot be haphazard. Businesses can consult a manufacturer and follow its guidelines to ensure the appropriate cable gland is selected and installed.

At the end of the day, businesses must ensure the selected cable glands can hold the cable in place without damaging it or the wires inside. And in a hazardous environment with explosive gases or combustible dust in the atmosphere, the appropriate explosion-proof cable glands must be installed to minimise the risk of an explosion.

Learn More: Explosion-Proof Cable Gland Selection Guide: Types And Applications

Intrinsic safety measures are essential for maintaining safe operations in hazardous environments. Therefore, it is crucial for businesses to avoid any mistakes during the implementation process that can compromise the equipment’s effectiveness. We hope what we shared has helped you improve the effectiveness of your intrinsic safety measures and ensure your operations remain safe and compliant with regulations.

If you require explosion-proof enclosures and intrinsically safe equipment for your business operation, look no further than Supermec! We are committed to offering innovative, reliable, and high-quality products and services to ensure businesses meet every safety requirement at their workplace. Do not hesitate to contact us today to learn more about our products.