LOAD LIMITS FOR WELDERS AND OTHER FLUCTUATING LOADS

Welders and other fluctuating loads can cause voltage and harmonic disturbances to the Customer's service and the Company's system. Input limits are:

(a) Single-Phase 120/240 Volt Services

The input current to a single-phase arc welder or other fluctuating load shall not exceed 37 amperes when connected across 240 volts on a 120/240 volt single-phase service to a single occupancy building or residence. Welders and fluctuating loads are not permitted to be connected across 120 volts.

(b) Three-Phase 230 Volt Services

The input current of a single-phase or three-phase arc-welder or other fluctuating load shall not exceed 100 amperes at 230 volts on a 230 volt, three-phase service.

(c) Other Services

Welders and fluctuating loads are generally not permitted to be connected on 120/208 volt services. Customers shall contact the Division Office to request service for larger welders and fluctuating loads on other services. It is important to request service limits as soon as the welder or fluctuating load size is chosen so the Company can make the detailed analysis required. When the load requires the Company to install facilities in excess of those required for a normal installation, the excess costs will be paid by the Customer.