IEC standard 60364-5-54 is the fundamental pillar for the design, selection, and installation of earthing systems and protective conductors in low-voltage systems. At Procainsa, we apply these standards to ensure the safety of people and the integrity of industrial assets.
IEC 60364-5-54
At Procainsa, we transform the technical requirements of IEC standard 60364 5 54 into robust engineering solutions for your industrial infrastructure. We don’t just design earthing systems; we guarantee the integrity of your assets and the safety of your personnel through rigorous regulatory compliance. Whether you need a design from scratch or an audit of an existing installation, our technical team ensures that every conductor, electrode, and connection complies with the industry’s most demanding resistance and durability standards.
Our services include:
Design and sizing of earthing networks and protective conductors.
Technical audits for regulatory compliance in industrial plants.
Corrosion studies for material selection according to soil type.
Measurements and tests of certified continuity.
Electrodes, earth conductors, and main terminals.
Sizing and types of materials.
To prevent dangerous potential differences.
IEC 60364-5-54
IEC standard 60364-5-54 focuses specifically on the selection and installation of earthing systems and protective conductors within low-voltage electrical systems. Its fundamental objective is to establish the necessary technical conditions for these systems to ensure the safety of people against electric shocks and the protection of assets against insulation failures. It regulates everything from the physical arrangement of earth electrodes to the configuration of main terminals, ensuring that any fault current is safely conducted to the ground without generating dangerous touch voltages for operators.
IEC 60364-5-54
One of the critical points addressed by IEC 60364-5-54 is the durability of materials. It is not enough for the system to work on the first day; it must withstand the chemical aggressiveness of the soil in the long term.
At Procainsa, as experts in corrosion engineering, we place special emphasis on this section of the standard. The choice of materials (copper, galvanized steel, or stainless steel) must be made after a prior study of the soil’s resistivity and composition.
Poor selection can lead to galvanic corrosion, compromising the continuity of the protective circuit and leaving the installation vulnerable to electrical faults.
IEC 60364-5-54 allows the use of various materials, provided they guarantee mechanical strength and corrosion protection. The most common are copper (bare or tinned), hot-dip galvanized steel, and stainless steel. The standard strictly prohibits the use of metal pipes for flammable services (gas) as earthing electrodes, and only permits water pipes under very strict conditions and with prior authorization.
There are two main methods accepted by the standard for determining the thickness of the earthing cable:
Simplified selection method: The cross-section of the protective conductor is chosen directly based on the size of the installation’s phase conductors (generally, if the phase is less than 16 mm², the earth conductor must be the same).
Thermal calculation method: This is a more precise calculation that takes into account the maximum fault current and the operating time of the protective devices. This method allows for cost optimization in large industrial projects, as it often permits the use of smaller cable cross-sections than the simplified method without compromising safety.
Although the standard describes various types of electrodes, it strongly recommends the use of foundation electrodes (embedded in concrete) for new constructions. This system offers low earth resistance and excellent equipotentiality, in addition to being naturally protected against corrosion by the concrete itself, simultaneously fulfilling electrical safety and lightning protection functions.
The protective conductor (PE) is the one that connects the exposed conductive parts of equipment to the main earthing terminal to ensure disconnection in case of a fault. On the other hand, the equipotential bonding conductor’s function is to connect accessible metallic parts (such as water pipes or building structures) to equalize their electrical potentials and prevent dangerous voltages from existing between them, even if there is no direct equipment fault.
