West Virginia Code of State Rules › Agency 150 - Public Service Commission › Title 150 - EXEMPT LEGISLATIVE RULE PUBLIC SERVICE COMMISSION › Series 150-03 - Government of Electric Utilities › Section 150-3-7 - Standards of Quality of Service

Current through Register Vol. XLI, No. 28, July 12, 2024
7.1. Standard voltage -- Each utility shall
				adopt a standard nominal voltage or standard nominal voltages, as may be
				required by the design of its distribution system for its entire constant
				voltage service, or for each of the several districts into which the systems
				may be divided, which standard voltages shall be filed with the
				Commission.
7.2. Voltage
				regulation.
7.2.1. Residential or lighting --
				The voltage level at the customer's service entrance equipment for a
				residential customer or a customer using service primarily for lighting shall
				be maintained between 112 volts and 127 volts on a 120 volt base.
7.2.2. Power.
7.2.2.a. For service rendered under a power
				contract or primarily for power purposes the voltage variation shall not exceed
				ten percent (10%) above or ten percent (10%) below standard voltage at any time
				the service is regularly furnished.
7.2.2.b. Service under a power contract means
				service furnished principally for industrial purposes. Where a limited amount
				of lighting (twenty percent (20%)) or less by connected load) is permitted to
				be connected under these contracts, the entire load shall be considered power
				as far as voltage variation is concerned.
7.2.3. Measurement point.
7.2.3.a. The point where voltage measurements
				are to be made shall be at the customer's service entrance equipment or at the
				lamps in the case of multiple street lighting.
7.2.3.b. The utility will be responsible for
				the voltage delivered at this point if the utility furnishes the service
				entrance conductors, carries them in its fixed capital account or accepts the
				responsibility of ownership.
7.2.3.c. If the customer furnishes and
				maintains the service entrance conductors, proper allowance may be made on any
				voltage tests if the conductors are not of reasonable size.
7.2.4. Combined light and power --
				By contracts contemplating an appreciable consumption or demand for lighting
				purposes is meant such service as street lighting, residential, commercial
				lighting, and combined lighting and power. If service is furnished at primary
				voltage to an ultimate customer under a combined lighting and power contract it
				is expected that the utility will limit the voltage fluctuation to give proper
				secondary voltage within the limits prescribed, assuming proper equipment is
				supplied by the customer.
7.2.5.
				Voltage variation -- The variation in voltage allowed in all parts of the rule
				except Rule 7.2.6. means the gradual change in voltage as a result of normal
				changes in load.
7.2.6. Flicker --
				Flicker is frequent and sudden changes in voltage occurring in one (1) second
				or less and exceeding three percent (3%) of the standard voltage. While
				occasional voltage fluctuations in excess of that listed above must be expected
				in the normal operation of a system, continuous flicker will be construed as
				below standard service, unless such variations are caused by the customer's own
				equipment.
7.2.7. Emergency service
				-- A greater variation in voltage than specified in this rule will be allowed
				for emergency service, but standby service must comply with the rules unless
				covered by a special contract.