od Figure 2-40. CHAPTERII, SECTION 3 Pipe Arrays Leading to Station 24 due to temperature changes or any vibrations from being transmitted to the scientific equipment. Roller supports and expansion joints in front of the fixed supports maintained accurate pipe alignment and provided for the longitudinal movementof the pipes. Power from the island primary distribution system led to a load center consisting of a dis- connect switch, a 112.5 KVA transformer, and a circuit breaker secondary distribution panel of 120/208 volt, 3-phase, 4 wire, 60 cycle. This load center also provided the power to two trailer receptacles and Stations 1817.02, 1816 and 1312.01. The connected load was 80 KW. Power distribution for utility and scientific purposes within Station 24 was made through an 18-circuit lighting panel. The scientific power was supplied through a special steel cabinet equipped with 20 duplex receptacles. Power to the receptacles ran through a ‘‘variac” volt- age control device which permitted adjustment from zero to 17 per cent above line voltage. Timing signals were supplied through a 37- . conductor cable terminating in a watertight 52-pair terminal cabinet. Telephone lines were provided through one 6-pair and four 1-pair cables terminating in a 52-pair terminal cabinet. In the process of station construction, dif- ficulty in pouring concrete was encountered due to the base of the foundation being underwater. This situation was overcome by placing the forms and back filling around them, thus forming a makeshift cassion. Prior to concrete place- ment, the water was pumped to as low a level as possible to eliminate dropping the concrete through the water. A total of 230 cubic yards of concrete was used in this station. The concrete cylinders taken averaged 4,421 psi when broken at 28 days. This average was high because a richer mix was used for the portion of the structure that was located in the water. Page 2-57