Common use of Test required Clause in Contracts

Test required. The tests shall be conformed to the latest related IEC. 3.3.3.1 cross–sectional area: the cross sectional area of the stranded conductor shall be taken as the sum of the areas of the aluminum wires composing the conductor based on the diameter measurements, this area shall not vary from the nominal value by more than ± 2 % in any sample and by ± 1.5 % for the average of any four measured values at location selected at random with a minimum spacing 20 cm. 3.3.3.2 Conductor diameter: the conductor diameter shall be measured midway between the closing die and the capstan on the stranding machine, measurement shall be made with caliper graduated to be read in 0.01 mm, the diameter shall be average of two readings, rounded to two decimals of a millimeter taken at right angles to each other at the same location, the diameter of the conductor shall not vary by ± 1 % from the nominal. 3.3.3.3 Linear density – mass per unit length: The linear density (mass per unit length) of the conductor shall be determined by using apparatus capable of achieving an accuracy of ± 1 %. The mass of the conductor per unit length without grease shall not vary from its nominal value by more than ± 2 %. The mass of grease in a conductor shall be determined from the difference between the mass of the conductor with grease and its mass after removing all the grease. 3.3.3.4 breaking strength of the wires: breaking strength tests shall be made on wires obtained from conductors after stranding , the specimen of wires shall be taken from the conductor sample and shall be removed from its position and straightened , the load shall be applied gradually with a rate of separation of the jaws not less than 25mm per minute and not greater than 100mm per minute , the load at failure divided by the cross section area of the wire shall not be less than 95% of the applicable stress requirement prior stranding.