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What are the test stages applicable in cable industry:-

Incoming inspection (Routine)
In-process inspection (Routine)
Final test and inspection (Routine)
Type tests on raw material, components, and finished goods
Third-party validation tests for product certification

Incoming inspection (The most ignored topic but could be most profitable as well):-

A cable manufacturer is ideally supposed to put an incoming inspection system which should ideally include:-

Weighing, documentation check, and visual inspection (to make sure that the correct quantity and material is supplied)
The specific gravity test of plastics (This test is very important to cable cost optimization as the consumption of plastic is done in Volume (Litres) whereas you buy it in Kilograms so to understand better the price/liter of plastic gives you an insight of costs per meter/volume of cable. Also, a specific gravity test of plastic (generally called density) gives a fair idea of fillers or heavy contaminations in the plastic.
Limiting oxygen index– At least once per 5 lots should be done. This test also is very important not only for flame resistivity of finished cable but again for cable cost optimization too. Compounds (especially PVC and LSZH) are made of several chemicals and antimony is one who is responsible for fire/flame resistivity of the compound, however, it’s one of the most expensive chemicals too. so in case if you do not require a very high flame resistance such as LOI of 34% or likewise, you can always ask your supplier to optimize the level of LOI as well as cost/kg for the compound.
Conductor:- Any metal whether its CU, Aluminium, Alloy or a superconductive one should be tested for its Resistance and weight per meter. This again gives you a gross margin over cable cost optimization as the conductors are on average 70% of a cable by cost. We can help companies on such projects as these are a bit long term projects following six sigma methodology and talking about it in a post is not possible. Email us at [email protected] in case this topic intrigues you and you want to know more.