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the residence district. Gasoline street lamps had been used in the past, but at the time that the electric lifting was installed, but few of these lamps were in commission. Center-span suspension of street lamps was decided upon, inasmuch as this construction results in more efficient illumination of both sides of the street, althouît necess- itates the additional expense of two poles per lamp (one for each side of the street) instead of but one pole with a bracket arm. The estimated peak load as shown by the tabulations in Table 1 is approximately 20.5 K.W. Sufficient generator capacity must be added to make it possible to charge the battery during the peak period and as a preliminary figure a 25 ampere, 225 volt battery was assumed as the maximum which would be required. This was determined from the following tabulation, which shows the size batteries and generator used in several installations in small towns. TABLE 2. BATTERY INSTALLATIONS IN VILLAGES. 5.
Page 2 and 3: Illinois Institute of Technology UN
Page 7 and 8: THE INSTALLATION OF AN ELECTRIC LIC
Page 9 and 10: TABLE OP COITENTS, —oooOooo— Se
Page 11 and 12: oooOnoo ?ig. 1 Plat of the Village
Page 13 and 14: THE mSHALLATIOS OP AN ELECTRIC LIGH
Page 15 and 16: SECTION I, HISTORY. The Village of
Page 17 and 18: SECTIOir II, Size of the Generator,
Page 19 and 20: This estimate is very liberal. The
Page 21: station capacity. This figure may a
Page 25 and 26: Ihs total estimated load le therefo
Page 27 and 28: sfeLOWs that •ttiis estimate chec
Page 29 and 30: Compensator ; This generator shall
Page 31 and 32: Alternating Current System ; SECTIO
Page 33 and 34: tunnels in the hills on each side o
Page 35 and 36: In the 18 typical plants Investigat
Page 37 and 38: TABLE NO. 3 COPPER CALCULATIONS Len
Page 39 and 40: 125/250 VOLT SYSTEM. peet Of Size o
Page 41 and 42: In addition to Its advaatages from
Page 43 and 44: SECTIOS IV* The Storage Battery. 15
Page 45 and 46: 16. longer psrlod of time each day
Page 47 and 48: to accomodate four additional plate
Page 49 and 50: apparatus is special and therefore
Page 51 and 52: SBCTION T. The Switchboard. In the
Page 53 and 54: 20. Is required. For intelligent op
Page 55 and 56: panel contains all the apparatus sr
Page 57 and 58: I!FEM #2 ; Egxtlpnent 1 - DJ. Type
Page 59 and 60: ITEM #4; 2 - D»PJ).T. 250 V. 60 am
Page 61 and 62: Poles ; SECTION VI. The Line Constm
Page 63 and 64: are 3 feet long, four-pin arms 4 fe
Page 65 and 66: The lamp can be lowered by means of
Page 67 and 68: 400 - 3/8" X 4" galT. carriage bolt
Page 69 and 70: eluding the cost of erection, SECTI
Page 72 and 73:
.II? .JGITO;;;;:. -xo iaelq b:
Page 77:
O JiOO Too -^
Page 85 and 86:
ELECTRIC SERVICE SUPPLIES COMPANY I
Page 87:
ELECTRIC SERVICE U P P L I E S COMP
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