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1948-49 Theatre Catalog, 7th Edition, Page 354 (341)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 354
Page 354

1948-49 Theatre Catalog, 7th Edition, Page 354


THEATRE SEATING CAPACITY 400 600 800 1500 2000 and Up 1 Exit and Aisle Lights 8-10 Watt Exit 10-10-Watt Exit 10410 Watt Exit 12-10 Watt Exit 500 Watts 10-10 Watt Aisle 20-10 Watt Aisle 24-10 Watt Aisle 30-10 Watt Aisle and -777 Total-180 Watts Total-300 Watts Total-340 Watts Total-420 Watts Up 2 Projection and 1500 W. Lamp or 1 KW Arc 50 Amp.-37 Volt 70 Amp.-37 Volt 70-Amp.-d7 Volt Booth Lights 1 KW Arc-14 Motor- 14 Motor- . Arc-1A Motor- Arc-M, Motor Arc and up 2-40 Watt Lights 240 Watt Lights 3-40 Watt Lights 3-40 Watt Lights 6000 to 18,000 Total for two Total for two Total for two Total for two Watts Projectors-3780 Projectors-2780 Projectors-4520 Projectors-6000 Watts (Max.) Watts (Maia) Watts (Max.) Watts (Main) 3 Sound Amp. 150 Watts 200 Watts 200 Watts 200 Watts 500 Watts 4 V Marquee (No estimates given. Requirements range from 100 to 30,000 watts, with theatre size not always an indicator.) 5 Rest Rooms 2-40 Watt Lights 2-40 Watt Lights 4-40 Watt Lights 8-40 Watt Lights 400 Watts and Up Total-80 Watts Total-80VHWatts Total-160 Watts Total-320 Watts 5 Heating Oil-V; H.P.- Oil-1 H.P.- Oil-11A; H.P. Oil-2 H.P. Oil-314. H.r.550 Watts 1000 Watts 1500 Watts 2000 Watts 3500 Watts Stoker-2 H.P.- Stoker-3 II.P.- Stoker-5 I-I.P.- Stoker-6 H.P.- Stoker-8 H.P. 2000 Watts 3000 Watts 5000 Watts 6000 Watts 8000 Watts ; (Add 1450 Watts) (Add 2000 lVatts) (Add 3500 Watts) (Add 4000 Watts) (Add 4500 Watts) 7 Cooling (Approx.) Water-4V2 KW- Water-8 KW Water-10 KW Water-10 KW (No: )liicluded 1n Refrigerant-18 KW Refrigerant-27 KW Refrigerant-36 KW Refrigerant-67.5 KW tota s i 8 POD-Corn 2200 Watts 2200 Watts 2800 Watts 2800 Watts 2800 Watts 7 W Machine 9 Other Lighting: 150 Watts 200 Watts 600 Watts 800 Watts 800 Watts and Up Ticket Office. Halls, 'Lohby, etc. - n Minimum Load 4,110 Watts 3,280 Watts 5.060 Watts 6,620 Watts 7,000 watts and Up (Items 1, 2, 3) (using lamps) 3.110 Watts (Using 1 KW Arc) Power Unit 5 KW 5 KW 10 KW 10 KW 10 KW and Up Recommended for Limited Operation Normal Load 7,090 Watts 6,760 Watts 10,110 Watts 12,540 Watts 14,500 Watts (Item 7 not incl.) (using lamps) ' (Baed on on heating) 5,090 watts (If Stoker heat 18 used, add wattages indicated in Item 6 to totals.) (Using 1 KW Arc) Power Unit 10 KW 10 KW 15 KW 15 KW 15 KW and Up Recommended for Normal Operation

*Figured on .045 tons of refrigerant used per seat, 1 H.P. used per ton, and 1000 Watts per H.P.

COST OF POWER UNITS COST OF LINE TRANSFER CONTROLS TOTAL 5 KW $ .862.50 $119.00 5 981.50 10 KW 1,445.00 195.00 1,640.00 15 KW 1,945.00 275.00 2,220.00 25 KW 2,295.00 275.00 2,570.00 35 KW 3,295.00 550.00 3,845.00

Note: These costs are not industry average. They are one manufacturers prices.


It is interesting to note that a theatre of 2000 seating capacity, or five times the capacity of a 400-seat house. requires only 50% increase in the size of a standby plant for normal operation. This is largely due to the fact that projection and booth lights requirements are relatively constant for both small and large theatres, when compared to other requirements.

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The recommended capacities of standby power plants, both for the "limited operation" and iinormal operation" columns, include the required wattage for running two projectors simultaneously while reels are being changed.

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Because the requirements for electric power to light fronts and marquees Varies so much, no figures are given. A survey of a number of theatres, showed that marquee lighting varies all the way from 500 watts to 30,000 watts. And it is not always the large theatres that use the most marquee lighting. In estimating the requirements for this purpose, therefore, add whatever wattage necessary for either partial or complete marquee lighting, and add to the recommended totals contained in the table.

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Exit lightsare generally 10-watt. Aisle lights are either 7 or 10-watt. The lighting needed for these two services is consequently very negligible. In a small theatre, it may total only 100 watts and even the largest house will not require much over 800 watts for this purpose.


Neon lighting takes approximately one 15,000-volt transformer for every 50 feet of tubing. Most such transformers are Hi-Power factor type requiring about 300 watts each. Roughly, four transformers will provide enough tubing for a small marquee. An extremely large marquee may take as many as 100 transformers that draw 30,000 watts. Approximately 500 watts are needed for each transformer of the LO-Power factor type.

* >2: 1:

Most practical type of standby plants for theatre use is the gas or gasoline engine powered. Diesel is not recommended, for two reasons. First, gas, gasoline engine driven plants will start quickly, an important factor in theatre standby operation. Diesel plants, on the other hand, generally are harder to start. Second, the main reason for using Diesel engines for power plants is their low fuel consumption factor. But since no theatre standby plant is expected to run for long periods of time, fuel economy is eliminated as a factor.

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Special attachments for operating standby plants from natural (city) gas, or from butane or propane, are available.

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Under certain conditions lack of space, objection to radiator heat, avoidance of noise-it is recommended that the standby plant be hooked up to city water; but even in the larger installations, the amount of needed water is relatively minor (from less than one gallon per minute, to six gallons per minute at 60 degrees).
1948-49 Theatre Catalog, 7th Edition, Page 354