Is a three-pin plug safe?

The end of the three-pin plug became controversial, but do you know why the Brazilian plug standard is safer? In this article we will show you why the three-pin plug is safer than the others. Come on guys!

Is a three-pin plug safe?

The main argument for there to be a single pattern of outlets in Brazil was security. And as clear as three-pin plugs seem to be more secure, there are still people questioning whether this plug pattern is really safer. We already said that this new model of sockets is safer, we will show two factors that make the three-pin sockets safer.

The first factor undoubtedly is the mandatory electrical grounding pin and hole , for when the equipment is not doubly isolated. Every professional in the Electrical Industry knows how grounding helps to reduce the consequences of electrical accidents.

Mandatory pin and electrical grounding hole.

Electrical grounding has the function of leaving all electrical installations, electrical and electronic equipment on the same electrical potential. One of the functions of grounding is to drain leakage charges, so as not to subject people to electrical discharges from equipment, either by leakage current , which is going to the housing or by electrostatic discharge. In addition, electrical grounding can also be functional, for a better quality of electrical energy, for example.

Unfortunately, we are aware of the precariousness of electrical installations in Brazil, that is, the vast majority of homes do not have electrical grounding, but this should not be used as an argument to be against the new standard.

For houses that have the correct grounding and use the third pin of the sockets with the grounding system, this house is undoubtedly safer than the others in terms of electric shock.

The second factor that is one of the biggest differentials of the new plug pattern is the lowering of the taps. See in the image below that the location where the pins are fitted is recessed in the socket of the new standard differs from the old standard. And inside the socket of the new standard the contacts are also deeper.

The place where the pins are fitted is lower.

This lowering of the sockets guarantees two different protections. The first is that it does not allow partial insertion of the plug and accidental contact. In the old standard socket that does not have the recess, we can see in the image below, that the socket offers contact without being fully seated, leaving the pin exposed.

The socket provides contact without being fully seated.

This detail favors the possibility of accidental contact with the energized part. As the plugin the old outlet may be exposed there is the possibility of accidental contact, further facilitating the risk of getting an electric shock.

As the plug in the old outlet may be exposed.

Comparing the plug of the new standard with the old standard, you can see in the image below that the plug must be fully inserted to have electrical contact.

The plug must be fully inserted to have electrical contact.

When taking the new standard, the metal part is totally protected, thus offering less risk and avoiding accidental contact with the energized part.

In the new standard sock

The end of the three-pin plug became controversial, but do you know why the Brazilian plug standard is safer? In this article, we will show you why the three-pin plug is safer than the others. Come on, guys!

Is a three-pin plug safe?

The main argument for there to be a single pattern of outlets in Brazil was security. And as clear as three-pin plugs seem to be more secure, there are still people questioning whether this plug pattern is really safer. We already said that this new model of sockets is safer, we will show two factors that make the three-pin sockets safer.

The first factor undoubtedly is the mandatory electrical grounding pin and hole, for when the equipment is not doubly isolated. Every professional in the Electrical Industry knows how grounding helps to reduce the consequences of electrical accidents.

Mandatory pin and electrical grounding hole.

Electrical grounding has the function of leaving all electrical installations, electrical and electronic equipment on the same electrical potential. One of the functions of grounding is to drain leakage charges, so as not to subject people to electrical discharges from equipment, either by leakage current, which is going to the housing or by electrostatic discharge. In addition, electrical grounding can also be functional, for the better quality of electrical energy, for example.

Unfortunately, we are aware of the precariousness of electrical installations in Brazil, that is, the vast majority of homes do not have electrical grounding, but this should not be used as an argument to be against the new standard.

For houses that have the correct grounding and use the third pin of the sockets with the grounding system, this house is undoubtedly safer than the others in terms of electric shock.

The second factor that is one of the biggest differentials of the new plug pattern is the lowering of the taps. See in the image below that the location where the pins are fitted is recessed in the socket of the new standard differently from the old standard. And inside the socket of the new standard the contacts are also deeper.

 

The place where the pins are fitted is lower.

This lowering of the sockets guarantees two different protections. The first is that it does not allow partial insertion of the plug and accidental contact. In the old standard socket that does not have the recess, we can see in the image below, that the socket offers contact without being fully seated, leaving the pin exposed.

 

The socket provides contact without being fully seated.

This details favors the possibility of accidental contact with the energized part. As the plug in the old outlet may be exposed there is the possibility of accidental contact, further facilitating the risk of getting an electric shock.

 

As the plug in the old outlet may be exposed.

Comparing the plug of the new standard with the old standard, you can see in the image below that the plug must be fully inserted to have electrical contact.

 

The plug must be fully inserted to have electrical contact.

When taking the new standard, the metal part is totally protected, thus offering less risk and avoiding accidental contact with the energized part.

 

In the new standard socket the metal part is completely protected.

The second protection of the lowering of the sockets is in the case of overlapping sockets of the old model, there is a risk of placing only one plug pin in the socket, the so-called unipolar contact. With a new standard socket, unipolar contact is not possible.

 

Risk of placing only one pin of the plug in the socket, unipolar contact.

Regardless of other factors that favor the adoption of other standards, it is important to always value safety and this adopted standard is very safe. As professionals in the Electrical World, we have to know the details before we stand for or against the end of the mandatory single plug standard in Brazil. Below is a video from the World of Electrical, talking about the end of the three-pin plugs.

et the metal part is completely protected.

The second protection of the lowering of the sockets is in the case of overlapping sockets of the old model, there is a risk of placing only one plug pin in the socket, the so-called unipolar contact. With a new standard socket, unipolar contact is not possible.

Risk of placing only one pin of the plugin the socket, unipolar contact.

Regardless of other factors that favor the adoption of other standards, it is important to always value safety and this adopted standard is very safe. As professionals in the Electrical World, we have to know the details before we stand for or against the end of the mandatory single plug standard in Brazil. Below is a video from the World of Electrical, talking about the end of the three-pin plugs.