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 39.195 - General requirements

(a) Electrical utilization equipment shall be of such construction and so installed and maintained as to reduce the life hazard as far as practicable.

(b) The requirements of the National Electrical (Fire) Code for the installation of wiring and fittings should be followed.

(c) If materials or devices are available which have been subjected to examination by some properly qualified body and found to comply with the general requirements of the National Electrical Safety Code, the National Electrical Code, and other nonconflicting accepted standards which apply for any given purpose, such materials or devices should be used in preference to others which have not been so examined regarding their suitability for the given purpose. In order to avoid the necessity for repetition of such examinations by different examiners, frequently with inadequate facilities for such work, and to avoid the confusion which may result from conflicting reports as to the suitability of devices examined for a given purpose, it is necessary that such examinations be made under standard conditions, and the record made generally available through promulgation by organizations properly equipped and qualified for experimental testing, inspections of the run of goods at factories and service value determinations through field inspections, and whose findings are subject to appeal to the Bureau of Standards.