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panel contains all the apparatus srieeifled In the first two panels
mentioned above, with the exception that there are four power feeder
switches instead of three. This combination of two panels into one
means a considerable saving, and will satisfactorily render the re-
quired service, and was therefoire adopted. "Che attached photostat
21.
(Figure 4) shows the general layout of the switchboard, the specifica-
tions for which are as follows;
SWITCHBOARD SPBCIPICATIONS.
Uaterlal of panels to be black marine finished slate.
Instruments to have dull black finish.
Panels to be mounted on substantial pipe framework.
Cardholders to be supplied ^ere necessary.
3WITCHB0AEU) TO COWTROL ;
1 - 250/125 V. 30 (A) Kw. D.C. 3-wire Generator.
2 - 250/l25 V, 100 amp. D.C. 3-wire Feeder Circuits.
2 - 250/l25 V. EOO amps, (max.) D.C. 3-wire Feeder Circuits.
4 - 250 V. 30 amps, (max.) D.C. 2-wire Feeder Circuits.
2 - 125 7. 50 amps. D.C. Battery Charging Circuits.
SWITCHBOARD TO CONSIST OF ;
1 - D.C. Combination 3-wire Generator & 4-cirouit Feeder Panel,
1 - D.C. 2-^ire, 4-circuit Feeder Panel.
1 - D.C. Battery Charging Panel,
Bus Material.
ITE!M #1 ;
1 - D.C. Combination 3-wire Generator and 4-clreiiit Feeder Panel.
Capacity; 250/l25 7. 30 (A) BS».
SIM; 48 X 32 X l-l/2" - Cat. 126552
16 X 32 X 1-1/2" - Cat . 126560
Mounted on 76" pipe supports.