This thesis focuses on the dimensional measurements of electrical conductors, which are used to build transformer windings. Using experiments at the test station, we determined the conditions for measurements, analyzed the dimensional changes of conductors under load and performed measurements of different types of conductors. We found that the LVDT sensors’ deviations from the correct dimensions can be large and non-linear. Therefore, we calibrated the sensor using gage blocks. Electrical conductors rapidly deform under load; therefore, managing the load during dimensional measurements is a key component of this process. The conductors’ measurements showed that the deviations from their tolerated dimensions can be considerable. We also noticed great differences in the build quality of conductors made by different manufacturers. On the basis of our findings, we decided to purchase a new measuring device for measuring the dimensions of the conductors. We introduced the measuring device into production and thus enabled the verification of the conductors’ dimensions within the prescribed conformity. This enables the input supply control of the electrical conductors and allows for better control over the process of making electrical windings.