During the 1950s, New Haven managements allowed their electric locomotives to deteriorate and began to use FL-9 diesels to pull freight trains under wires that had to remain electrified for passenger service into New York City. After declaring bankruptcy in 1961, the trustees realized they needed new electric freight locomotives and, in 1963, they acquired 12 nearly new electric locomotives from the Norfolk & Western’s Virginian Railway at the bargain price of $300,000 total. These 3,300 HP motors, designated EF-4, and numbered #300-310, were known as “bricks” on the New Haven and usually ran in pairs. They utilized 11,000-volt AC power and converted it to DC for the traction motors, like the New Haven’s EP-5 passenger electrics. They ran between Cedar Hill (New Haven) and Bay Ridge (Brooklyn) and lasted until the Penn Central takeover in 1969, when they became PC Class E-33 and were removed from New Haven territory. They became Conrail property in 1976 and ran until 1981.