New Jersey Administrative Code
Title 14 - PUBLIC UTILITIES
Chapter 5 - ELECTRIC SERVICE
Subchapter 3 - SERVICE
Section 14:5-3.2 - Adequacy of service

(a) EDCs supplying electrical energy on a constant potential system shall adopt and maintain a standard nominal voltage as measured at the point of attachment to the customer's wiring; and the normal variations, as measured by a standardized voltmeter, shall not vary for periods exceeding five minutes for all secondary voltages more than five percent above, nor more than five percent below said standard nominal voltage for said location, which is in force at the time; provided, however, the variations in voltage caused by the operation of apparatus in the customer's premises in violation of the utility's rules, the action of the elements, or other causes beyond the EDC's control shall not be considered a violation of this provision.

(b) Each EDC shall supply alternating current at a standard frequency per industry standard, the suitability of which may be determined by the Board, and shall maintain this frequency. However, changes or variations of frequency, which are clearly not due to lack of proper equipment or reasonable care on the part of the EDC shall not be considered a violation of this rule.