IEC 61482 is an international standard that pertains to protective clothing designed to provide protection against the thermal hazards of an electric arc. The title of the standard is “Live working – Protective clothing against the thermal hazards of an electric arc.” It falls under the domain of electrical safety and personal protective equipment (PPE).

Electric arcs can generate intense heat and energy, which can pose significant hazards to workers in industries where electrical systems are present, such as power generation, distribution, and maintenance. IEC 61482 aims to ensure that protective clothing worn by workers in these industries provides effective protection against the thermal hazards associated with electric arcs.

The standard outlines two different methods for testing and classifying protective clothing:

1. Box Test Method (IEC 61482-1-1): This method involves exposing a fabric sample to an electric arc in a controlled environment. The fabric is tested to determine its arc rating, which indicates the level of thermal protection it provides against the energy generated by an electric arc. The arc rating helps in categorizing the fabric’s ability to protect the wearer.
2. Open Arc Test Method (IEC 61482-1-2): This method simulates a real-world scenario where the clothing is worn by a mannequin that is exposed to an electric arc. The arc exposure generates heat and energy similar to an actual electrical fault. This method assesses the garment’s performance in a more realistic setting.

The results of these tests lead to the classification of protective clothing into different categories, which provide information about the level of protection they offer against electric arcs. These categories include:

• Class 1: Clothing providing protection against electric arc exposure with an arc rating of at least 4 kA (kiloamperes).
• Class 2: Clothing providing protection against electric arc exposure with an arc rating of at least 7 kA.
• Class 3: Clothing providing protection against electric arc exposure with an arc rating of at least 25 kA.

Manufacturers use these classifications to indicate the level of protection offered by their garments against electric arc hazards.

It’s important to note that standards can be updated or revised, so it’s recommended to consult the latest version of IEC 61482 or any relevant updates to ensure accurate and up-to-date information.

EN ISO 11612 is a European standard that pertains to protective clothing designed to protect the wearer from heat and flames. The standard is titled “Protective clothing – Clothing to protect against heat and flame” and falls under the category of personal protective equipment (PPE). EN ISO 11612 specifies the requirements and testing methods for clothing that is intended to provide protection against various levels of heat and flame exposure.

The standard covers clothing that is used in a variety of industrial settings where workers might be exposed to potential hazards such as flames, radiant heat, convective heat, molten metal splashes, and contact heat. The main purpose of this standard is to ensure that the protective clothing effectively minimizes the risk of burns and injuries that can result from exposure to heat and flames.

EN ISO 11612 categorizes protective clothing into different performance levels based on its ability to resist heat and flame exposure. The standard specifies the requirements for each level, covering aspects like flame spread, convective and radiant heat resistance, and resistance to molten metal splashes.

The main parameters covered by EN ISO 11612 include:

1. A: Limited Flame Spread – This parameter measures the clothing’s ability to resist the spread of flames across its surface.
2. B: Convective Heat Resistance – This parameter indicates the clothing’s ability to protect against heat transmitted through convection, such as exposure to hot air.
3. C: Radiant Heat Resistance – This parameter measures the clothing’s ability to protect against radiant heat, such as heat radiating from flames.
4. D: Molten Aluminum Splash Resistance – This parameter assesses the clothing’s ability to resist molten aluminum splashes.
5. E: Molten Iron Splash Resistance – This parameter assesses the clothing’s ability to resist molten iron splashes.
6. F: Contact Heat Resistance – This parameter measures the clothing’s ability to protect against contact with heated surfaces.

Manufacturers use these codes to indicate the protective properties of their garments. For example, a garment that is designed to offer protection against flame spread, convective and radiant heat, and molten metal splashes might be labeled with the code A1, B1, C1, E1.

As standards can change and evolve, it’s important to refer to the most recent version of EN ISO 11612 or any updates to ensure accurate and current information.