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mined for the most part by a consideration of each individual case. The purpose for which the plant is installed, unusual conditions to which any part may be subjected, necessary delays occurring during the process of construction, relation of one part of the installation to another, time intervening between the completion of the plant and its active operation, operation before completion and like considerations should be given careful attention).
All work shall be regularly and systematically tested while in process of construction and any defects found shall be immediately remedied.
The final tests shall be made in the presence
of the | architect \ or his representative^and^ the right is reserved by (the purchaser) in case any doubt arises as to the fulfillment of the true spirit and intent of the specifications, to demand a test by expert engineers selected as is usual in matters of arbitration, whose decision shall be final on all disputed points, the expense of such test to be borne equally by both parties unless the apparatus or material shall prove defective, in which case the contractor shall bear the expense, and shall alsoJ remedy the defects. He shall also be liable for any damage or loss to (the purchaser) resulting from conditions incident to the remedying of such defects,
17. inspection. During its progress the work shall be subject to the inspection of the j ^JSftoS f or his representative, and of the
j Board of Fire Underwriters. )
( Board of Inspectors. j
On its completion a
( Board of Fire Underwriters ) . fl .
j Board of Inspectors [ certificate
shall be furnished (the purchaser) by the contractor stating that all the insurance rules and regulations under which the work was done have been complied with. All costs of such inspection to be borne by the contractor.
is. insurance All work shall be done in accordance with
the rules and regulations of .
is. Accept (Note.—The same considerations that determine the character of the tests will also enter largely into the conditions of the acceptance.)
(The purchaser) will assume no liability nor responsibility for any part of the installation until formally accepted in Avriting.
No part of the installation will be accepted until (the purchaser) is satisfied that it fully complies with the spirit and intent of the specifications.
The acceptance of any portion of the work shall not be construed as a final acceptance, and the failure of any part to perform its proper function shall be sufficient ground for the rejection of the whole.
The final acceptance shall be given only after the completion of the work contemplated under the specifications according to their true spirit and intent, and after the final tests as specified. Such acceptance, however, shall not prejudice any claim which (the purchaser) may have for the replacement of defective material for the time specified.
The date of the completion of the final tests shall be taken as the date of such final acceptance, provided such tests prove satisfactory.
(To conform to individual cases.)
10. Terms of Payment.
INSTALLATION OF DYNAMOS AND SWITCHBOARDS.
Low Potential, Direct Current System, Two-
This contractor shall furnish, and, unless otherwise specified, erect the following apparatus and material:
21. Dynamos. direct current, constant potential dy
namo(s) (each) having a normal capacity of
— amperes at volts.
The(se) dynamo(s) shall be
of the latest and most efficient pattern;
hours without increasing the temperature of any parespecially the armature, fields, and commutator, to such a degree as to endanger the insulation or decrease the efficiency of operation; shall not spark appreciably with proper care of the commutator and adjustment of brushes, nor under considerable variation of load; shall have an insulation resistance of not less than —— ohms between all parts insulated from each other; shall be adapted to operate at such speed as will allow the use of high speed, automatic cut-off engines belted direct; shall be provided with efficientJjOTling devices; the armature shall be balanced both electrically and mechanically so that there will be no tendency to spring the shaft, or to draw the armature toward either bearing so as to cause excessive friction and heating, and no vibration; the dy namo(s) shall be so designed that the power required will be automatically proportioned to the number and candle power of the lamps burning at any time; that with the proper connections any number may be operated in parallel of whatever ampere capacity, provided the voltage be the same; that when connected so to operate it shall be possible, with ordinary care and precaution, to add to or take away from the circuit any dynamo without in any manner affecting the operation of the remainder, or causing any change in the candle power or steadiness of the lamps; and that when two or more are operating on the same circuit in parallel the load may be divided bet ween them in proportion to their respective capacities under all conditions, from no load to full load; and that with the proper connections any number of pairs, a pair consisting of two similar dynamos, may be manipulated in the same manner and with the same effect as single dynamos, as indicated ahove,