Certain words when used in contracts, schedules and rules and regulations for electric service of the city shall be understood to have the following meanings.
(a) “Company” means the City of Philippi.
(b) “Customer” means any person, firm, corporation or municipality receiving and using electric service supplied by the Company through a service connection or owning the premises so supplied through such service connection.
(c) “Service” means any electric energy or service which the Company may supply, or any duty or obligation which may be performed by it.
(d) “Month” means approximately one-twelfth of a year and may be any period of 25 to 35 consecutive days.
(e) “Service connection” means each connection through which the company furnishes any electric service to the customer.
(f) “Operation” means a single enterprise conducted by a customer where all of such enterprise is prosecuted as one unit.