ABNT NBR-5410 low voltage installations, what is it?

Electricity is dangerous, so when we refer to electricity we must always take safety into account. Electricity is a phenomenon that human beings use, but cannot put their hands on, for this reason, for professionals in this area there are a series of standards and recommendations, such as NBR 5410, intended for low voltage electrical installations. Find out which standards an electrician must follow, what is ABNT, what is NBR 5410 among other doubts, come on the person!

What standards should the electrician follow?

The technical recommendations that the electricity professional must follow are the NBR’s Brazilian Norms, these try to normalize the facilities and services so that they do not offer risks to humans, animals, material goods.

The NBR’s are approved by ABNT, Brazilian Association of Technical Standards, ABNT is the one who has the rights to the standards and who can make the standards available for download, such as the NBR-5410 in pdf.

What is NBR 5410?

The Brazilian standard NBR-5410 is that it stipulates the adequate conditions for the usual and safe operation of low voltage electrical installations, that is, up to 1000V in alternating voltage and 1500V in continuous voltage.

The number-5410 is mainly applied in building, public, commercial installations, etc. Working as a guide for the professional, regarding what to do or not to do. The standard has a different text, explaining and placing rules in low voltage installations, so it makes a big difference to know it and mainly to apply it.

The main objective of the NBR-5410 is to establish the conditions that low voltage electrical installations must satisfy in order to guarantee safety, the proper functioning of the installation and the conservation of assets.

What is ABNT?

ABNT (Brazilian Association of Technical Standards) is a private, non-profit organization that aims to standardize production techniques made in the national territory. Therefore, as it is a private institution, its application is not an obligation, because they are not public documents, but several laws make the standards consulted and applied, this topic is very controversial and the recommendation is to always use the standards. to ensure quality service.

Where NBR-5410 applies:

The NBR-5410 is a standard for all low voltage electrical installations, so we think about residential installation, so the topics below clarify and exemplify the application of this standard.

  • Uncovered areas, external to the buildings;
  • Camping, marine, and similar facilities;
  • Temporary installations such as construction sites, fairs, etc .;
  • Electrical circuits that are not inside equipment, operating under-voltage greater than 1000 volts, and powered by an installation equal to or less than 1000 volts and alternating current;
  • New and existing installations, under renovation;
  • Electric circuits supplied with a nominal voltage equal to or less than 1000 V in alternating current (AC), frequency below 400 Hz, or 1500 V and direct current (DC);
  • Wiring and electrical networks that are not covered by the standards for the equipment in use;
  • Fixed electrical signal lines with the exception of the equipment’s internal circuits.

Low voltage electrical installations

Where NBR-5410 does not apply:

Some of the points that will be mentioned belong to specific norms specific to the installation, even though they are inside low voltage installations, that’s why the NBR-5410 does not apply to them. The application of NBR-5410 does not exempt from following other standards applied in specific situations or places and the regulations that the installation must follow.

  • Electric traction installations;
  • Electrical installations for motor vehicles, electric cars, for example;
  • Vessel and aircraft installations;
  • Equipment for the suppression of radioelectric disturbances, insofar as it does not compromise the security of the installations;
  • Street lighting;
  • Public electrical distribution networks;
  • Installations for protection against direct lightning strikes, however this standard considers the consequences of atmospheric phenomena on the installations, for example, selection of protection devices against overvoltage;
  • Mine facilities;
  • Installations in electric fences.

Difference between NR and NBR:

NR’s are regulatory standards for issues related to occupational safety and medicine, published only by the Ministry of Labor and Employment, and are entirely mandatory.

The NBR’s are technical standards, conceived through consensus and studies related to the theme, they are voluntary and only become mandatory when this condition is established by the government. They stipulate requirements for quality, performance, safety, etc.

Final considerations.

Undoubtedly making an installation based on the norms is correct, as this ensures the proper functioning, the conservation of assets and especially safety. The standards are created to regulate and bring equality between electrical installations, in addition to guaranteeing quality.

Complying with the standard is to ensure that the installations are within what is considered to be safe operation, thus minimizing the risk of accidents as much as possible.