A large number of Users were concerned with the operation of these experiment stations and their design criteria was cleared through JDivision, Since some of these Users were unable to forward their complete design criteria in time to meet the construction schedule, it was necessary to estimate their requirements and provide wiring and equipment in advance. J-Division concurred with this and, on the basis of their preliminary instrumentation criteria furnished the early part of August, 1950, all basic panels and special circuit breakers, switches, etc., were ordered. Cancellation of stations 132a, 132b, 132c, 141, 142, 143, and 144, on Runit resulted in the first reassignment of panels on August 17, 1950. Final criteria was received from J-Division on October 12, 1950, as a result of which additional panels were ordered for stations 140 and 144 on the Aomon Group and Engebi. A final reassignment of power panels allocat- ing each panel to the structure it would best serve was issued on Decem~ ber 14, 1950. All materials purchased for this phase of the job were tagged "SCISTAT" for identification purposes of shipping and storage and were used only for the Scientific Stations. In order to assure a low voltage drop together with good voltage reg- ulation for the instrumentation loads, it was decided to serve these loads from a separate transformer bank. The utility loads such as lighting, de- humidifiers, etc., were grouped together on a second transformer bank. This arrangement reduced the possibility of utility load fluctuations affecting the instrument circuits. The utility system was supplied at 120/208 volts, 3-phase, 4-wire through type MO circuit breaker panels for lighting and through fusible switch panel containing circuit breaker main for power. The fusible switch type of panel was used for power distribution in order to provide flexibility in circuit arrangements and ease of changing ratings. Lighting fixtures installed were vapor-proof type without guards except in a few cases where globe was omitted because of low ceilings. The instrumentation circuits were supplied through a converti-fuse type panel containing main switch, Switch sizes used were 30, 60 and 100 ampere rating and ample link-type fuses and fuse-reducers were furnished to permit easy changing of fuse ratings. In other words, a 100 ampere switch could be fused at 10 amperes by using the proper size fuse reducer, This flexibility proved to be of great value during the actual operations, Receptacle strips were installed in Stations 6a, 69, and 132a, b, c. These “plug-in" strips were cut to desired length and assembled with 2 and 3 wire receptacles, The assembled "strips" were mounted on the surface of the station walls, The purpose of these strips was to provide power for the Users' operational equipment. 120/208 volt direct burial service cables entered the stations through conduit sleeves which extended from the panel pull-box to just beyond the outside paved area, These cables were 600 volt, multiconductor, type RJ, installed between transformer and panel. 5-183