Category: Knowledge about Safety Shoes

What is electric resistant safety footwear?
Can electric resistant safety footwear resist 10^∧4V from Pikachu?

 

Do you know what voltage is? Voltage lies in the general electricity discharging phenomenon. The unit of the voltage is volts (V). Generally speaking, we care about the appliances for 110V or 220V whenever aboard. Therefore, a transformer will be used while the electrical appliance does not match the voltage.

 

Electric resistant safety footwear is also called electric insulated one.

 

The so-called electric resistance is to prevent electric current from flowing through, also known as insulation. Therefore, electric resistant safety footwear is also called electric insulated one, which is meant to protects the wearers from electric shock by preventing dangerous currents from flowing through the foot through the body.

 

How much voltage can a pair of electric resistant safety footwear withstand?

 

Although the electric resistant safety shoes can prevent the current from passing through, it has a certain load value. In CNS20345, which EN50321 (foreign reference) is cited, it can be electric resistant safety shoes while it is not be penetrated after the application of AC 5000V for three minutes. Stricter standards, such as ASTMF2413, 18000V for 1 minute.

 

Can electric resistant safety footwear resist 10^∧4V from Pikachu?

 

In Taiwan, the electrical capability of a pair of  electric resistant safety footwear is basically 3,300V. Ours withstand 12,000V, and some in other brands can withstand 18,000V. However, none has not resisted 10^∧4V from Pikachu so far.

 

What workplaces will you need to wear electric resistant safety footwear at?

 

Such as distributing technicians, power-repairing technicians and electricians.

 

What kind of personnel is electric insulated safety footwear not suitable for?

 

At any workplaces where may cause dangerous working environments due to static electricity generated by the human body, such as gas plants, liquefied natural gas plants, petroleum corporations, certain clean rooms etc. (Introduction of anti-static shoes as reference)

 

 

• The inspection report for Soletec electric resistant safety footwear are attached as reference:

   Electric resistance is 12,000V in 2019.

 

What is anti-static footwear?

How do we test anti-static footwear?

 

 

What is about anti-static footwear?

 

Many labor friends wear safety footwear, and some people especially wear anti-puncture one. Have you ever heard of anti-static footwear or one with electric insulation? What exactly is anti-static footwear? Why will you need to wear it?

 

Before speaking of anti-static, we should talk about “static”. What is static? In daily life, we feel electric current flowing through our bodies while there is a sudden touch of metal objects. That is static, electricity discharging phenomenon. And, anti-static appliances are meant to reduce or eliminate static happening. There are some ways to decrease or eliminate static, such as wet, ground and static eliminator. The use of anti-static footwear is grounding. In short, it is to contact the electricity of our bodies with the ground, and it will avoid static electricity once the static electricity in our bodies is grounded.

 

Based on the M.O.E.A (Bureau of Standards, Metrology and Inspection) in Taiwan, ISO (International Organization for Standardization) and EN (European Standard), the requirements for anti-static footwear shall be 10∧5Ω < electric resistance≦10∧9Ω.

 

Take hitting the ground with bare feet for example, it will not be electrically conductive while bare feet on the wood. However, it will be while bare feet on an iron plate. In other words, general shoes are like wood while anti-static footwear is just like an iron plate. 10∧5Ω < electric resistance≦10∧9Ω.

 

How is anti-static footwear tested? Watch the video.

 

Basic formula for electricity: V (voltage) = I (current) x R (resistance). As shown in the video, we give a voltage of 1000V to measure the resistance of the shoe.

 

What workplaces will you need to wear anti-static footwear at?

 

At any workplaces where may cause dangerous working environments due to static electricity generated by the human body, such as gas plants, liquefied natural gas plants, petroleum corporations, certain clean rooms etc.

 

What kind of personnel is anti-static footwear not suitable for?

 

Such as electricians and power-repairing technicians. They will get an electric shock easily in rainy days or in shoes conducting electricity. (Introduction of electric resistant safety footwear as reference)