Se você é proprietário do prédio, e fornece " supervisão contínua de gerenciamento de edifícios ". Então sim, o painel pode ser trancado. Caso contrário, não. Os inquilinos precisam ter acesso aos seus painéis.

Bem, tecnicamente ... A porta pode ser trancada, mas os inquilinos devem ter uma chave.

National Electrical Code 2014

Chapter 2 Wiring and Protection

Article 240 Overcurrent Protection

240.24 Location in or on Premises.

(B) Occupancy. Each occupant shall have ready access to all overcurrent devices protecting the conductors supplying that occupancy, unless otherwise permitted in 240.24(B)(1) and (B)(2).

(1) Service and Feeder Overcurrent Devices. Where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the service overcurrent devices and feeder overcurrent devices supplying more than one occupancy shall be permitted to be accessible only to authorized management personnel in the following:

(1) Multiple-occupancy buildings

(2) Guest rooms or guest suites.

(2) Branch-Circuit Overcurrent Devices. Where electric service and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the branch-circuit overcurrent devices supplying any guest rooms or guest suites without permanent provisions for cooking shall be permitted to be accessible only to authorized management personnel.