Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 39 - SAFETY STANDARDS-GENERAL
Subchapter B - ELECTRIC SAFETY
PROTECTIVE ARRANGEMENTS
Section 39.192 - Scope

(1) Electrical utilization equipment between 25 volts and 750 volts, if accessible to other than qualified electrical operators, as in mills, factories, mercantile establishments, hotels, theaters, and other public buildings, cars and other vehicles, and dwellings and similar places. Signal equipment connected to signal lines is exempted, except from the provisions of §§ 39.301-39.304 (relating to telephone and other signal apparatus on circuits exposed by supply lines).

(2) Equipment and conductors exceeding 750 volts, in addition to complying with the provisions for stations and other applicable provisions of this Subchapter, shall, where accessible to other than qualified electrical operators, have ungrounded current-carrying parts either incased in permanently grounded metal cases or conduits, or otherwise suitably guarded to prevent access or too close approach to such current-carrying parts by any specially authorized persons.

(3) Electrical utilization equipment, however, as well as generating equipment, if enclosed in a separate room which is inaccesible to unauthorized persons, and when in service is under control of a qualified electrical operator whose attention is not distracted by other processes, shall be installed in conformity with the provisions of §§ 39.81-39.90 (relating to installation and maintenance of electrical supply station and equipment).