Concessionaires of generation, transmission and distribution of electric energy and its entities of classroom pressure the MTE with the objective to modify security norm that proíbe the high-voltage execution of services in nets for an only professional. One is about item 10.7.3 of the NR-10. On the other hand, in letter sent to the minister of the work, Marine Luiz, the Union of the Eletricitários of São Paulo (STIEESP) asks for that the item is kept. The letter is a repudiation to the attitude of controllers and representative entities of the companies of the sector.